Author: "Mihara S" / Topic: high energy physics::experiment - Searchworks@Jio Institute Digital Library Search Results

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141 results on '"Mihara S"'

1. PIONEER: Studies of Rare Pion Decays

Author: Altmannshofer, W., Gori, S., Godoy, M., Grillo, A., Mazza, S., Ott, J., Schumm, B., Seiden, A., Tarka, M., Binney, H., Garcia, A., Hertzog, D., Hodge, Z., Kammel, P., LaBounty, J., Roehnelt, R., Blucher, E., Bryman, D., Chen, S., Cirigliano, V., Corrodi, S., Hernandez, C. Ortega, Cuen-Rochin, S., Czarnecki, A., DiCanto, A., Jaffe, D., Kettel, S., Tischenko, V., Tricoli, A., Worcester, E., Doria, L., Gorchtein, M., Ries, D., Gaponenko, A., Kiburg, B., Mott, J., Polly, C., Gibbons, L., Labe, K., Glaser, C., Počanić, D., Gorringe, T., Hoferichter, M., Ito, S., Mihara, S., Iwamoto, T., Mori, T., Ootani, W., Wataru, T., Langenegger, U., Schwendimann, P., Malbrunot, C., Mischke, R., Numao, T., Pachal, K., Sher, A., Velghe, B., Wong, V., Soter, A., Shrock, R., and Sullivan, T.
Subjects: Physics - Instrumentation and Detectors, hep-ex, FOS: Physical sciences, hep-ph, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), High Energy Physics::Experiment, Detectors and Experimental Techniques, physics.ins-det, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract: A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\mu}$ is known to 1 part in $10^4$, which is 15 times more precise than the current experimental result. An experiment reaching the theoretical accuracy will test lepton flavor universality at an unprecedented level, probing mass scales up to the PeV range. Measurement of pion beta decay, $\pi^+\to \pi^0 e^+ \nu (\gamma)$, with 3 to 10-fold improvement in sensitivity, will determine $V_{ud}$ in a theoretically pristine manner and test CKM unitarity, which is very important in light of the recently emerged tensions. In addition, various exotic rare decays involving sterile neutrinos and axions will be searched for with unprecedented sensitivity. The experiment design benefits from experience with the recent PIENU and PEN experiments at TRIUMF and the Paul Scherrer Institut (PSI). Excellent energy and time resolutions, greatly increased calorimeter depth, high-speed detector and electronics response, large solid angle coverage, and complete event reconstruction are all critical aspects of the approach. The PIONEER experiment design includes a 3$\pi$ sr 25 radiation length calorimeter, a segmented low gain avalanche detector stopping target, a positron tracker, and other detectors. Using intense pion beams, and state-of-the-art instrumentation and computational resources, the experiments can be performed at the PSI ring cyclotron.
Published: 2022

2. A New Charged Lepton Flavor Violation Program at Fermilab

Author: Aoki, M., Appleby, R. B., Aslaninejad, M., Barlow, R., Bernstein, R. H., Bloise, C., Lorenzo Calibbi, Cervelli, F., Culbertson, R., Gouvea, Andre Luiz, Di Falco, S., Diociaiuti, E., Donati, S., Donghia, R., Echenard, B., Gaponenko, A., Giovannella, S., Group, C., Happacher, F., Hedges, M. T., Hitlin, D. G., Hungerford, E., Johnstone, C., Kaplan, D. M., Kargiantoulakis, M., Kelliher, D. J., Kirch, K., Knecht, A., Kuno, Y., Kurup, A., Lagrange, J. -B, Lancaster, M., Long, K., Luca, A., Lynch, K., Machida, S., Martini, M., Middleton, S., Mihara, S., Miller, J., Miscetti, S., Morescalchi, L., Mori, Y., Murat, P., Muratori, B., Neuffer, D., Papa, A., Pasternak, J., Pedreschi, E., Pezzullo, G., Planche, T., Porter, F., Prebys, E., Prior, C. R., Pronskikh, V., Ray, R., Renga, F., Rogers, C., Sarra, I., Sato, A., Smith, S. L., Spinella, F., Stratakis, D., Syphers, M., Truong, N. M., Tygier, S., Uchida, Y., and Yucel, M.
Subjects: High Energy Physics - Experiment (hep-ex), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Physics::Accelerator Physics, FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: The muon has played a central role in establishing the Standard Model of particle physics, and continues to provide valuable information about the nature of new physics. A new complex at Fermilab, the Advanced Muon Facility, would provide the world's most intense positive and negative muon beams by exploiting the full potential of PIP-II and the Booster upgrade. This facility would enable a broad muon physics program, including studies of charged lepton flavor violation, muonium-antimuonium transitions, a storage ring muon EDM experiment, and muon spin rotation experiments. This document describes a staged realization of this complex, together with a series of next-generation experiments to search for charged lepton flavor violation., Comment: A Contributed Paper for Snowmass 2021
Published: 2022
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3. Muon polarization in the MEG experiment: predictions and measurements

Author: Baldini, A. M., Bao, Y., Baracchini, E., Bemporad, C., Berg, F., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, Gianluca, Cei, F., Chiarello, G., Chiri, C., De Bari, A., De Gerone, M., D’Onofrio, A., Dussoni, S., Fujii, Y., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwamoto, T., Kaneko, D., Kang, T. I., Kettle, P. R., Khazin, B. I., Khomutov, N., Korenchenko, A., Kravchuk, N., Lim, G. M. A., Mihara, S., Molzon, W., Mori, Toshinori, Mtchedlishvili, A., Nakaura, S., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Ootani, W., Panareo, M., Papa, A., Pepino, A., Piredda, G., Pizzigoni, G., Popov, A., Renga, F., Ripiccini, Emanuele, Ritt, S., Rossella, M., Rutar, G., Sawada, R., Sergiampietri, F., Signorelli, G., Tassielli, G. F., Tenchini, F., Uchiyama, Y., Venturini, M., Voena, C., Yamamoto, A., Yoshida, K., You, Z., Yudin, Y. u. V., Baldini, A. M., Bao, Y., Baracchini, E., Bemporad, C., Berg, F., Biasotti, M., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiarello, Gianluigi, Chiri, Claudio, Bari, A. De, Gerone, M. De, D’Onofrio, A., Dussoni, S., Fujii, Y., Galli, L., Gatti, F., Grancagnolo, F., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hodge, Z., Ieki, K., Ignatov, F., Iwamoto, T., Kaneko, D., Kang, T. I., Kettle, P. R., Khazin, B. I., Khomutov, N., Korenchenko, A., Kravchuk, N., Lim, G. M. A., Mihara, S., Molzon, W., Mori, Toshinori, Mtchedlishvili, A., Nakaura, S., Nicolò, D., Nishiguchi, H., Nishimura, M., Ogawa, S., Ootani, W., Panareo, Marco, Papa, A., Pepino, Aurora, Piredda, G., Pizzigoni, G., Popov, A., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Rutar, G., Sawada, R., Sergiampietri, F., Signorelli, G., Tassielli, GIOVANNI FRANCESCO, Tenchini, F., Uchiyama, Y., Venturini, M., Voena, C., Yamamoto, A., Yoshida, K., You, Z., and Yudin, Y. u. V.
Subjects: Muon, Polarization, Lepton Flavor Violation, Michel decay, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, lepton flavour violation, FOS: Physical sciences, muon decay, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Physics::Accelerator Physics, High Energy Physics::Experiment, Engineering (miscellaneous)
Abstract: The MEG experiment makes use of one of the world's most intense low energy muon beams, in order to search for the lepton flavour violating process $\mu^{+} \rightarrow {\rm e}^{+} \gamma$. We determined the residual beam polarization at the thin stopping target, by measuring the asymmetry of the angular distribution of Michel decay positrons as a function of energy. The initial muon beam polarization at the production is predicted to be $P_{\mu} = -1$ by the Standard Model (SM) with massless neutrinos. We estimated our residual muon polarization to be $P_{\mu} = -0.85 \pm 0.03 ~ {\rm (stat)} ~ { }^{+ 0.04}_{-0.05} ~ {\rm (syst)}$ at the stopping target, which is consistent with the SM predictions when the depolarizing effects occurring during the muon production, propagation and moderation in the target are taken into account. The knowledge of beam polarization is of fundamental importance in order to model the background of our ${\megsign}$ search induced by the muon radiative decay: $\mu^{+} \rightarrow {\rm e}^{+} \bar{\nu}_{\mu} \nu_{\rm e} \gamma$.
Published: 2016

4. Search for neutral MSSM Higgs bosons at LEP

Author: Schael, S., Barate, R., Bruneliere, R., Bonis, I. D., Decamp, D., Goy, C., Jezequel, S., Lees, J. P., Martin, F., Merle, E., Minard, M. N., Pietrzyk, B., Trocme, B., Bravo, S., Casado, M. P., Chmeissani, M., Crespo, J. M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Martinez, M., Pacheco, A., Ruiz, H., Colaleo, A., Creanza, D., Filippis, N. D., Palma, M. d., Iaselli, G., Maggi, G., Maggi, M., Nuzzo, S., Ranieri, A., Raso, G., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Tricomi, A., Zito, G., Huang, X., Lin, J., Ouyang, Q., Wang, T., Xie, Y., Xu, R., Xue, S., Zhang, J., Zhang, L., Zhao, W., Abbaneo, D., Barklow, T., Buchmueller, O., Cattaneo, M., Clerbaux, B., Drevermann, H., Forty, R. W., Frank, M., Gianotti, F., Hansen, J. B., Harvey, J., Hutchcroft, D. E., Janot, P., Jost, B., Kado, M., Mato, P., Moutoussi, A., Ranjard, F., Rolandi, L., Schlatter, D., Teubert, F., Valassi, A., Videau, I., Badaud, F., Dessagne, S., Falvard, A., Fayolle, D., Gay, P., Jousset, J., Michel, B., Monteil, S., Pallin, D., Pascolo, J. M., Perret, P., Hansen, J. D., Hansen, J. R., Hansen, P. H., Kraan, A. C., Nilsson, B. S., Kyriakis, A., Markou, C., Simopoulou, E., Vayaki, A., Zachariadou, K., Blondel, A., Brient, J. C., Machefert, F., Rouge, A., Videau, H., Ciulli, V., Focardi, E., Parrini, G., Antonelli, A., Antonelli, M., Bencivenni, G., Bossi, F., Capon, G., Cerutti, F., Chiarella, V., Mannocchi, C., Laurelli, P., Mannocchi, G., Murtas, G. P., Passalacqua, L., Kennedy, J., Lynch, J. G., Negus, P., O'Shea, V., Thompson, A. S., Wasserbaech, S., Cavanaugh, R., Dhamotharan, S., Geweniger, C., Hanke, P., Hepp, V., Kluge, E. E., Putzer, A., Stenzel, H., Tittel, K., Wunsch, M., Beuselinck, R., Cameron, W., Davies, G., Dornan, P. J., Girone, M., Marinelli, N., Nowell, J., Rutherford, S. A., Sedgbeer, J. K., Thompson, J. C., White, R., Chete, V. M., Girtler, P., Kneringer, E., Kuhn, D., Rudolph, G., Bouhova Thacker, E., Bowdery, C. K., Clarke, D. P., Ellis, G., Finch, A. J., Foster, F., Hughes, G., R. W. L., Pearson, M. R., Robertson, N. A., Smizanska, M., Der, O. v., Delaere, C., Leibenguth, G., Lemaitre, V., Blumenschein, U., Hoelldorfer, F., Jakobs, K., Kayser, F., Mueller, A. S., Renk, B., Sander, H. G., Schmeling, S., Wachsmuth, H., Zeitnitz, C., Ziegler, T., Bonissent, A., Coyle, P., Curtil, C., Ealet, A., Fouchez, D., Payre, P., Tilquin, A., Ragusa, F., David, A., Dietl, H., Ganis, G., Huettmann, K., Luetjens, G., Maenner, W., Moser, H. G., Settles, R., Villegas, M., Wolf, G., Boucrot, J., Callot, O., Davier, M., Duflot, L., Grivaz, J. F., Heusse, P., Jacholkowska, A., Serin, L., Veillet, J. J., Azzurri, P., Bagliesi, G., Boccali, T., Foa, L., Giammanco, A., Giassi, A., Ligabue, F., Messineo, A., Palla, F., Sanguinetti, G., Sciaba, A., Sguazzoni, G., Spagnolo, P., Tenchini, R., Venturi, A., Verdini, P. G., Awunor, O., Blair, G. A., Cowan, G., Garcia Bellido, A., Green, M. G., Medcalf, T., Misiejuk, A., Strong, J. A., Teixeira Dias, P., Clifft, R. W., Edgecock, T. R., Norton, P. R., Tomalin, I. R., Ward, J. J., Bloch Devaux, B., Boumediene, D., Colas, P., Fabbro, B., Lancon, E., Lemaire, M. C., Locci, E., Perez, P., Rander, J., Tuchming, B., Vallage, B., Litke, A. M., Taylor, G., Booth, C. N., Cartwright, S., Combley, F., Hodgson, P. N., Lehto, M., Thompson, L. F., Boehrer, A., Brandt, S., Grupen, C., Hess, J., Ngac, A., Prange, G., Borean, C., Giannini, G., He, H., Putz, J., Rothberg, J., Armstrong, S. R., Berkelman, K., Cranmer, K., D. P. S., Gao, Y., Gonzalez, S., Hayes, O. J., Hu, H., Jin, S., Kile, J., Mcnamara, P. A., Nielsen, J., Pan, Y. B., Von, J. H., Wiedenmann, W., Wu, J., S. L., Wu, Wu, X., Zobernig, G., Dissertori, G., Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., Alemany Fernandez, R., Allmendinger, T., Allport, P. P., Amaldi, U., Amapane, N., Amato, S., Anashkin, E., Andreazza, A., Andringa, S., Anjos, N., Antilogus, P., Apel, W. D., Arnoud, Y., Ask, S., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Ballestrero, A., Bambade, P., Barbier, R., Bardin, D., Barker, G. J., Baroncelli, A., Battaglia, M., Baubillier, M., Becks, K. H., Begalli, M., Behrmann, A., Ben Haim, E., Benekos, N., Benvenuti, A., Berat, C., Berggren, M., Berntzon, L., Bertrand, D., Besancon, M., Besson, N., Bloch, D., Blom, M., Bluj, M., Bonesini, M., Boonekamp, M., P. S. L., Borisov, G., Botner, O., Bouquet, B., T. J. V., Boyko, I., Bracko, M., Brenner, R., Brodet, E., Bruckman, P., Brunet, J. M., Buschbeck, B., Buschmann, P., Calvi, M., Camporesi, T., Canale, V., Carena, F., Castro, N., Cavallo, F., Chapkin, M., Charpentier, P., Checchia, P., Chierici, R., Chliapnikov, P., Chudoba, J., Chung, S. U., Cieslik, K., Collins, P., Contri, R., Cosme, G., Cossutti, F., Costa, M. J., Crennell, D., Cuevas, J., D'Hondt, J., Dalmau, J., Silva, T. d., Silva, W. d., Ricca, G. D., Angelis, A. D., Boer, W. D., Clercq, C. D., Lotto, B. D., Maria, N. D., Min, A. D., Paula, L. d., Ciaccio, L. D., Simone, A. D., Doroba, K., Drees, J., Eigen, G., Ekelof, T., Ellert, M., Elsing, M., Espirito, M. C., Fanourakis, G., Fassouliotis, D., Feindt, M., Fernandez, J., Ferrer, A., Ferro, F., Flagmeyer, U., Foeth, H., Fokitis, E., Fulda Quenzer, F., Fuster, J., Gandelman, M., Garcia, C., Gavillet, P., Gazis, E., Gokieli, R., Golob, B., Gomez Ceballos, G., Goncalves, P., Graziani, E., Grosdidier, G., Grzelak, K., Guy, J., Haag, C., Hallgren, A., Hamacher, K., Hamilton, K., Haug, S., Hauler, F., Hedberg, V., Hennecke, M., Herr, H., Hoffman, J., Holmgren, S. O., Holt, P. J., Houlden, M. A., Hultqvist, K., Jackson, J. N., Jarlskog, G., Jarry, P., Jeans, D., Johansson, E. K., Johansson, P. D., Jonsson, P., Joram, C., Jungermann, L., Kapusta, F., Katsanevas, S., Katsoufis, E., Kernel, G., Kersevan, B. P., Kerzel, U., King, B. T., Kjaer, N. J., Kluit, P., Kokkinias, P., Kourkoumelis, C., Kouznetsov, O., Krumstein, Z., Kucharczyk, M., Lamsa, J., Leder, G., Ledroit, F., Leinonen, L., Leitner, R., Lemonne, J., Lepeltier, V., Lesiak, T., Liebig, W., Liko, D., Lipniacka, A., Lopes, J. H., Lopez, J. M., Loukas, D., Lutz, P., Lyons, L., Macnaughton, J., Malek, A., Maltezos, S., Mandl, F., Marco, J., Marco, R., Marechal, B., Margoni, M., Marin, J. C., Mariotti, C., Markou, A., Martinez Rivero, C., Masik, J., Mastroyiannopoulos, N., Matorras, F., Matteuzzi, C., Mazzucato, F., Mazzucato, M., Nulty, R. M., Meroni, C., Migliore, E., Mitaroff, W., Mjoernmark, U., Moa, T., Moch, M., Moenig, K., Monge, MARIA ROBERTA, Montenegro, J., Moraes, D., Moreno, S., Morettini, P., Mueller, U., Muenich, K., Mulders, M., Mundim, L., Murray, W., Muryn, B., Myatt, G., Myklebust, T., Nassiakou, M., Navarria, F., Nawrocki, K., Nicolaidou, R., Nikolenko, M., Oblakowska Mucha, A., Obraztsov, V., Olshevski, A., Onofre, A., Orava, R., Osterberg, K., Ouraou, A., Oyanguren, A., Paganoni, M., Paiano, S., Palacios, J. P., Palka, H., Papadopoulou, T. D., Pape, L., Parkes, C., Parodi, Fabrizio, Parzefall, U., Passeri, A., Passon, O., Peralta, L., Perepelitsa, V., Perrotta, A., Petrolini, Alessandro, Piedra, J., Pieri, L., Pierre, F., Pimenta, M., Piotto, E., Podobnik, T., Poireau, V., Pol, M. E., Polok, G., Pozdniakov, V., Pukhaeva, N., Pullia, A., Rames, J., Read, A., Rebecchi, P., Rehn, J., Reid, D., Reinhardt, R., Renton, P., Richard, F., Ridky, J., Rivero, M., Rodriguez, D., Romero, A., Ronchese, P., Roudeau, P., Rovelli, T., Ruhlmann Kleider, V., Ryabtchikov, D., Sadovsky, A., Salmi, L., Salt, J., Sander, C., Savoy Navarro, A., Schwickerath, U., Segar, A., Sekulin, R., Siebel, M., Sisakian, A., Smadja, G., Smirnova, O., Sokolov, A., Sopczak, A., Sosnowski, R., Spassov, T., Stanitzki, M., Stocchi, A., Strauss, J., Stugu, B., Szczekowski, M., Szeptycka, M., Szumlak, T., Tabarelli, T., Taffard, A. C., Tegenfeldt, F., Timmermans, J., Tkatchev, L., Tobin, M., Todorovova, S., Tome, B., Tonazzo, A., Tortosa, P., Travnicek, P., Treille, D., Tristram, G., Trochimczuk, M., Troncon, C., Turluer, M. L., Tyapkin, I. A., Tyapkin, P., Tzamarias, S., Uvarov, V., Valenti, G., Dam, P. V., Eldik, J. V., Remortel, N. v., Vulpen, I. V., Vegni, G., Veloso, F., Venus, W., Verdier, P., Verzi, V., Vilanova, D., Vitale, L., Vrba, V., Wahlen, H., Washbrook, A. J., Weiser, C., Wicke, D., Wickens, J., Wilkinson, G., Winter, M., Witek, M., Yushchenko, O., Zalewska, A., Zalewski, P., Zavrtanik, D., Zhuravlov, V., Zimin, N. I., Zintchenko, A., Zupan, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M. G., Anderhub, H., Andreev, V. P., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S. V., Banerjee, S., Barczyk, A., Barillere, R., Bartalini, P., Basile, M., Batalova, N., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biglietti, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Boehm, A., Boldizsar, L., Borgia, B., Bottai, S., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., Brochu, F., Burger, J. D., Burger, W. J., Cai, X. D., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A., Casaus, J., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Chamizo, M., Chang, Y. H., Chemarin, M., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, G., Cifarelli, L., Cindolo, F., Clare, I., Clare, R., Coignet, G., Colino, N., Costantini, S., B. d., La, Cucciarelli, S., Asmundis, R. d., Deglon, P., Debreczeni, J., Degre, A., Dehmelt, K., Deiters, K., Volpe, D. d., Delmeire, E., Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierckxsens, M., Dionisi, C., Dittmar, M., Doria, A., Dova, M. T., Duchesneau, D., Duda, M., Echenard, B., Eline, A., Hage, A. E., Mamouni, H. E., Engler, A., Eppling, F. J., Extermann, P., Falagan, M. A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., Fisher, W., Forconi, G., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gentile, S., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hatzifotiadou, D., Hebbeker, T., Herve, A., Hirschfelder, J., Hofer, H., Hohlmann, M., Holzner, G., Hou, S. R., Hu, J., Jin, B. N., Jindal, P., Jones, L. W., Jong, P. d., Josa Mutuberria, I., Kaur, M., Kienzle Focacci, M. N., Kim, J. K., Kirkby, J., Kittel, W., Klimentov, A., Konig, A. C., Kopal, M., Koutsenko, V., Kraeber, M., Kraemer, R. W., Krueger, A., Kunin, A., P. L., De, Laktineh, I., Landi, G., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., J. M., Le, Leiste, R., Levtchenko, M., Levtchenko, P., Li, C., Likhoded, S., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Luci, C., Luminari, L., Lustermann, W., W. G., Ma, Malgeri, L., Malinin, A., C. M., Na, Mans, J., Martin, J. P., Marzano, F., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, L., Meschini, M., Metzger, W. J., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Muanza, G. S., A. J. M., Musicar, B., Musy, M., Nagy, S., Natale, S., Napolitano, M., Nessi Tedaldi, F., Newman, H., Nisati, A., Novak, T., Nowak, H., Ofierzynski, R., Organtini, G., Pal, I., Palomares, C., Paolucci, P., Paramatti, R., Passaleva, G., Patricelli, S., Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret Gallix, D., Piccolo, D., Pierella, F., Pieri, M., Pioppi, M., Piroue, P. A., Pistolesi, E., Plyaskin, V., Pohl, M., Pojidaev, V., Pothier, J., Prokofiev, D., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Ranieri, R., Raspereza, A., Razis, P., Rembeczki, S., Ren, D., Rescigno, M., Reucroft, S., Riemann, S., Riles, K., Roe, B. P., Romero, L., Rosca, A., Rosemann, C., Rosenbleck, C., Rosier Lees, S., Roth, S., Rubio, J. A., Ruggiero, G., Rykaczewski, H., Sakharov, A., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Schaefer, C., Schegelsky, V., Schopper, H., Schotanus, D. J., Sciacca, C., Servoli, L., Shevchenko, S., Shivarov, N., Shoutko, V., Shumilov, E., Shvorob, A., Son, D., Souga, C., Spillantini, P., Steuer, M., Stickland, D. P., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Sushkov, S., Suter, H., Swain, J. D., Szillasi, Z., Tang, X. W., Tarjan, P., Tauscher, L., Taylor, L., Tellili, B., Teyssier, D., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Ulbricht, J., Valente, E., Van, R. T., Vasquez, R., Vesztergombi, G., Vetlitsky, I., Viertel, G., Vivargent, M., Vlachos, S., Vodopianov, I., Vogel, H., Vogt, H., Vorobiev, I., Vorobyov, A. A., Wadhwa, M., Wang, Q., Wang, X. L., Wang, Z. M., Weber, M., Wynhoff, S., Xia, L., Z. Z., Xu, Yamamoto, J., Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhao, J., Zhu, G. Y., Zhu, R. Y., Zhuang, H. L., Zichichi, A., Zimmermann, B., Zoeller, M., Abbiendi, G., Ainsley, C., Akesson, P. F., Alexander, G., Allison, J., Amaral, P., Anagnostou, G., Anderson, K. J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., Bell, P. J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, R. M., Buesser, K., Burckhart, H. J., Campana, S., Carnegie, R. K., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Jong, S. d., Roeck, A. D., E. A., De, Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J. W., Gascon Shotkin, S. M., Gaycken, G., Geich Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Guenther, P. O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harel, A., Hauschild, M., Hawkes, C. M., Hawkings, R., Hemingway, R. J., Herten, G., Heuer, R. D., Hill, J. C., Hoffman, K., Horvath, D., Igo Kemenes, P., Ishii, K., Jeremie, H., Jost, U., Jovanovic, P., Junk, T. R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kraemer, T., Krieger, P., Krogh, J. v., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G. D., Landsman, H., Lanske, D., Layter, J. G., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S. L., Loebinger, F. K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A. J., Masetti, G., Mashimo, T., Maettig, P., Mckenna, J., Mcpherson, R. A., Meijers, F., Menges, W., Merritt, F. S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H. A., Nisius, R., O'Neale, S. W., Oh, A., Oreglia, M. J., Orito, S., Pahl, C., Pasztor, G., Pater, J. R., Pilcher, J. E., Pinfold, J., Plane, D. E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J. M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., E. K. G., Schaile, A. D., Schaile, O., Scharff Hansen, P., Schieck, J., Schoerner Sadenius, T., Schroeder, M., Schumacher, M., Scott, W. G., Seuster, R., Shears, T. G., Shen, B. C., Sherwood, P., Skuja, A., Smith, A. M., Sobie, R., Soldner Rembold, S., Spano, F., Stahl, A., Strom, D., Stroehmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M. A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner Watson, M. F., Ueda, I., Ujvari, B., Vollmer, C. F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Wilson, G. W., Wilson, J. A., Wyatt, T. R., Yamashita, S., Zer Zion, D., Zivkovic, L., Heinemeyer, S., Pilaftsis, A., Weiglein, G., Collaboration, L., Collaboration, A., Collaboration, D., Collaboration, O., Grp, L. W., Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique et Astroparticules (LPTA), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), ALEPH, DELPHI, L3, OPAL, Laboratoire d'Annecy de Physique des Particules (LAPP), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), ALEPH Collaboration, DELPHI Collaboration, L3 Collaboration, OPAL Collaboration, S., Schael, Aloisio, Alberto, Alviggi, Mariagrazia, Canale, Vincenzo, Chiefari, Giovanni, DELLA VOLPE, Domenico, Merola, Leonardo, Napolitano, Marco, Patricelli, Sergio, Sciacca, Crisostomo, Giannini, Gianrossano, DELLA RICCA, Giuseppe, Vitale, Lorenzo, Schael, S., Barate, R., Bruneliere, R., De Bonis, I., Decamp, D., Goy, C., Jezequel, S., Lees, J. P., Martin, F., Merle, E., Minard, M. N., Pietrzyk, B., Trocme, B., Bravo, S., Casado, M. P., Chmeissani, M., Crespo, J. M., Fernandez, E., Fernandez Bosman, M., Garrido, L., Martinez, M., Pacheco, A., Ruiz, H., Colaleo, A., Creanza, D., De Filippis, N., de Palma, M., Iaselli, G., Maggi, G., Maggi, M., Nuzzo, S., Ranieri, A., Raso, G., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Tricomi, A., Zito, G., Huang, X., Lin, J., Ouyang, Q., Wang, T., Xie, Y., Xu, R., Xue, S., Zhang, J., Zhang, L., Zhao, W., Abbaneo, D., Barklow, T., Buchmueller, O., Cattaneo, M., Clerbaux, B., Drevermann, H., Forty, R. W., Frank, M., Gianotti, F., Hansen, J. B., Harvey, J., Hutchcroft, D. E., Janot, P., Jost, B., Kado, M., Mato, P., Moutoussi, A., Ranjard, F., Rolandi, Luigi, Schlatter, D., Teubert, F., Valassi, A., Videau, I., Badaud, F., Dessagne, S., Falvard, A., Fayolle, D., Gay, P., Jousset, J., Michel, B., Monteil, S., Pallin, D., Pascolo, J. M., Perret, P., Hansen, J. D., Hansen, J. R., Hansen, P. H., Kraan, A. C., Nilsson, B. S., Kyriakis, A., Markou, C., Simopoulou, E., Vayaki, A., Zachariadou, K., Blondel, A., Brient, J. C., Machefert, F., Rouge, A., Videau, H., Ciulli, V., Focardi, E., Parrini, G., Antonelli, A., Antonelli, M., Bencivenni, G., Bossi, F., Capon, G., Cerutti, F., Chiarella, V., Mannocchi, C., Laurelli, P., Mannocchi, G., Murtas, G. P., Passalacqua, L., Kennedy, J., Lynch, J. G., Negus, P., O'Shea, V., Thompson, A. S., Wasserbaech, S., Cavanaugh, R., Dhamotharan, S., Geweniger, C., Hanke, P., Hepp, V., Kluge, E. E., Putzer, A., Stenzel, H., Tittel, K., Wunsch, M., Beuselinck, R., Cameron, W., Davies, G., Dornan, P. J., Girone, M., Marinelli, N., Nowell, J., Rutherford, S. A., Sedgbeer, J. K., Thompson, J. C., White, R., Chete, V. M., Girtler, P., Kneringer, E., Kuhn, D., Rudolph, G., Bouhova Thacker, E., Bowdery, C. K., Clarke, D. P., Ellis, G., Finch, A. J., Foster, F., Hughes, G., Jones, R. W. L., Pearson, M. R., Robertson, N. A., Smizanska, M., van der Aa, O., Delaere, C., Leibenguth, G., Lemaitre, V., Blumenschein, U., Hoelldorfer, F., Jakobs, K., Kayser, F., Mueller, A. S., Renk, B., Sander, H. G., Schmeling, S., Wachsmuth, H., Zeitnitz, C., Ziegler, T., Bonissent, A., Coyle, P., Curtil, C., Ealet, A., Fouchez, D., Payre, P., Tilquin, A., Ragusa, F., David, A., Dietl, H., Ganis, G., Huettmann, K., Luetjens, G., Maenner, W., Moser, H. G., Settles, R., Villegas, M., Wolf, G., Boucrot, J., Callot, O., Davier, M., Duflot, L., Grivaz, J. F., Heusse, P., Jacholkowska, A., Serin, L., Veillet, J. J., Azzurri, P., Bagliesi, G., Boccali, T., Foa, L., Giammanco, A., Giassi, A., Ligabue, Franco, Messineo, A., Palla, F., Sanguinetti, G., Sciaba, A., Sguazzoni, G., Spagnolo, P., Tenchini, R., Venturi, A., Verdini, P. G., Awunor, O., Blair, G. A., Cowan, G., Garcia Bellido, A., Green, M. G., Medcalf, T., Misiejuk, A., Strong, J. A., Teixeira Dias, P., Clifft, R. W., Edgecock, T. R., Norton, P. R., Tomalin, I. 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J., Crennell, D., Cuevas, J., D'Hondt, J., Dalmau, J., da Silva, T., da Silva, W., Della Ricca, G., De Angelis, A., De Boer, W., De Clercq, C., De Lotto, B., De Maria, N., De Min, A., de Paula, L., Di Ciaccio, L., Di Simone, A., Doroba, K., Drees, J., Eigen, G., Ekelof, T., Ellert, M., Elsing, M., Santo M. C., Espirito, Fanourakis, G., Fassouliotis, D., Feindt, M., Fernandez, J., Ferrer, A., Ferro, F., Flagmeyer, U., Foeth, H., Fokitis, E., Fulda Quenzer, F., Fuster, J., Gandelman, M., Garcia, C., Gavillet, P., Gazis, E., Gokieli, R., Golob, B., Gomez Ceballos, G., Goncalves, P., Graziani, E., Grosdidier, G., Grzelak, K., Guy, J., Haag, C., Hallgren, A., Hamacher, K., Hamilton, K., Haug, S., Hauler, F., Hedberg, V., Hennecke, M., Herr, H., Hoffman, J., Holmgren, S. O., Holt, P. J., Houlden, M. A., Hultqvist, K., Jackson, J. N., Jarlskog, G., Jarry, P., Jeans, D., Johansson, E. K., Johansson, P. D., Jonsson, P., Joram, C., Jungermann, L., Kapusta, F., Katsanevas, S., Katsoufis, E., Kernel, G., Kersevan, B. P., Kerzel, U., King, B. T., Kjaer, N. J., Kluit, P., Kokkinias, P., Kourkoumelis, C., Kouznetsov, O., Krumstein, Z., Kucharczyk, M., Lamsa, J., Leder, G., Ledroit, F., Leinonen, L., Leitner, R., Lemonne, J., Lepeltier, V., Lesiak, T., Liebig, W., Liko, D., Lipniacka, A., Lopes, J. H., Lopez, J. M., Loukas, D., Lutz, P., Lyons, L., Macnaughton, J., Malek, A., Maltezos, S., Mandl, F., Marco, J., Marco, R., Marechal, B., Margoni, M., Marin, J. C., Mariotti, C., Markou, A., Martinez Rivero, C., Masik, J., Mastroyiannopoulos, N., Matorras, F., Matteuzzi, C., Mazzucato, F., Mazzucato, M., Mc Nulty, R., Meroni, C., Migliore, E., Mitaroff, W., Mjoernmark, U., Moa, T., Moch, M., Moenig, K., Monge, R., Montenegro, J., Moraes, D., Moreno, S., Morettini, P., Mueller, U., Muenich, K., Mulders, M., Mundim, L., Murray, W., Muryn, B., Myatt, G., Myklebust, T., Nassiakou, M., Navarria, F., Nawrocki, K., Nicolaidou, R., Nikolenko, M., Oblakowska Mucha, A., Obraztsov, V., Olshevski, A., Onofre, A., Orava, R., Osterberg, K., Ouraou, A., Oyanguren, A., Paganoni, M., Paiano, S., Palacios, J. P., Palka, H., Papadopoulou, T. D., Pape, L., Parkes, C., Parodi, F., Parzefall, U., Passeri, A., Passon, O., Peralta, L., Perepelitsa, V., Perrotta, A., Petrolini, A., Piedra, J., Pieri, L., Pierre, F., Pimenta, M., Piotto, E., Podobnik, T., Poireau, V., Pol, M. E., Polok, G., Pozdniakov, V., Pukhaeva, N., Pullia, A., Rames, J., Read, A., Rebecchi, P., Rehn, J., Reid, D., Reinhardt, R., Renton, P., Richard, F., Ridky, J., Rivero, M., Rodriguez, D., Romero, A., Ronchese, P., Roudeau, P., Rovelli, T., Ruhlmann Kleider, V., Ryabtchikov, D., Sadovsky, A., Salmi, L., Salt, J., Sander, C., Savoy Navarro, A., Schwickerath, U., Segar, A., Sekulin, R., Siebel, M., Sisakian, A., Smadja, G., Smirnova, O., Sokolov, A., Sopczak, A., Sosnowski, R., Spassov, T., Stanitzki, M., Stocchi, A., Strauss, J., Stugu, B., Szczekowski, M., Szeptycka, M., Szumlak, T., Tabarelli, T., Taffard, A. C., Tegenfeldt, F., Timmermans, J., Tkatchev, L., Tobin, M., Todorovova, S., Tome, B., Tonazzo, A., Tortosa, P., Travnicek, P., Treille, D., Tristram, G., Trochimczuk, M., Troncon, C., Turluer, M. L., Tyapkin, I. 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BRUNET, B. BUSCHBECK, P. BUSCHMANN, M. CALVI, T. CAMPORESI, V. CANALE, F. CARENA, N. CASTRO, F. CAVALLO, M. CHAPKIN, P. CHARPENTIER, P. CHECCHIA, R. CHIERICI, P. SHLYAPNIKOV, J. CHUDOBA, S. CHUNG, K. CIESLIK, P. COLLINS, R. CONTRI, G. COSME, F. COSSUTTI, M. COSTA, D. CRENNELL, J. CUEVAS, J. D'HONDT, J. DALMAU, T. DA SILVA, W. DA SILVA, G. DELLA RICCA, A. DE ANGELIS, W. DE BOER, C. DE CLERCQ, B. DE LOTTO, N. DEMARIA, A. DE MIN, L. DE PAULA, L. DI CIACCIO, A. DI SIMONE, K. DOROBA, J. DREES, G. EIGEN, T. EKELOF, M. ELLERT, M. ELSING, M.C. ESPIRITO SANTO, G. FANOURAKIS, D. FASSOULIOTIS, M. FEINDT, J. FERNANDEZ, A. FERRER, F. FERRO, U. FLAGMEYER, H. FOETH, E. FOKITIS, F. FULDA-QUENZER, J. FUSTER, M. GANDELMAN, C. GARCIA, P. GAVILLET, EVANGELOS GAZIS, R. GOKIELI, B. GOLOB, G. GOMEZ-CEBALLOS, P. GONCALVES, E. GRAZIANI, G. GROSDIDIER, K. GRZELAK, J. GUY, C. HAAG, A. HALLGREN, K. HAMACHER, K. HAMILTON, S. HAUG, F. HAULER, V. HEDBERG, M. HENNECKE, H. HERR, J. HOFFMAN, S. HOLMGREN, P. HOLT, M. HOULDEN, K. HULTQVIST, J. JACKSON, G. JARLSKOG, P. JARRY, D. JEANS, E. JOHANSSON, P.D. JOHANSSON, P. JONSSON, C. JORAM, L. JUNGERMANN, F. KAPUSTA, S. KATSANEVAS, E. KATSOUFIS, G. KERNEL, B. KERSEVAN, U. KERZEL, B. KING, N. KJAER, P. KLUIT, P. KOKKINIAS, C. KOURKOUMELIS, O. KUZNETSOV, Z. KRUMSHTEIN, M. KUCHARCZYK, J. LAMSA, G. LEDER, F. LEDROIT, L. LEINONEN, R. LEITNER, J. LEMONNE, V. LEPELTIER, T. LESIAK, W. LIEBIG, D. LIKO, A. LIPNIACKA, J. LOPES, J. LOPEZ, D. LOUKAS, P. LUTZ, L. LYONS, J. MACNAUGHTON, A. MALEK, S. MALTEZOS, F. MANDL, J. MARCO, R. MARCO, B. MARECHAL, M. MARGONI, J. MARIN, C. MARIOTTI, A. MARKOU, C. MARTINEZ-RIVERO, J. MASIK, N. MASTROYIANNOPOULOS, F. MATORRAS, C. MATTEUZZI, F. MAZZUCATO, M. MAZZUCATO, R. MCNULTY, C. MERONI, E. MIGLIORE, W. MITAROFF, U. MJORNMARK, T. MOA, M. MOCH, K. MONIG, R. MONGE, J. MONTENEGRO, D. MORAES, S. MORENO, P. MORETTINI, U. MUELLER, K. MUNICH, M. MULDERS, L. MUNDIM, W. MURRAY, B. MURYN, G. MYATT, T. MYKLEBUST, M. NASSIAKOU, F. 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FISHER, W. FISHER, G. FORCONI, K. FREUDENREICH, C. FURETTA, Y. GALAKTIONOV, S. GANGULI, P. GARCIA-ABIA, M. GATAULLIN, S. GENTILE, S. GIAGU, Z. GONG, G. GRENIER, O. GRIMM, M. GRUENEWALD, M. GUIDA, V. GUPTA, A. GURTU, L. GUTAY, D. HAAS, D. HATZIFOTIADOU, T. HEBBEKER, A. HERVE, J. HIRSCHFELDER, H. HOFER, M. HOHLMANN, G. HOLZNER, S. HOU, J. HU, B. JIN, P. JINDAL, L. JONES, P. DE JONG, I. JOSA-MUTUBERRIA, M. KAUR, M. KIENZLE-FOCACCI, J. KIM, J. KIRKBY, W. KITTEL, A. KLIMENTOV, A. KO, M. KOPAL, V. KOUTSENKO, M. KRABER, R. KRAEMER, A. KRUGER, A. KUNIN, P. LADRON DE GUEVARA, I. LAKTINEH, G. LANDI, M. LEBEAU, A. LEBEDEV, P. LEBRUN, P. LECOMTE, P. LECOQ, P. LE COULTRE, J. LE GOFF, R. LEISTE, M. LEVTCHENKO, P. LEVCHENKO, C. LI, S. LIKHODED, C. LIN, W. LIN, F. LINDE, L. LISTA, Z. LIU, W. LOHMANN, E. LONGO, Y. LU, C. LUCI, L. LUMINARI, W. LUSTERMANN, W.G. MA, L. MALGERI, A. MALININ, C. MANA, J. MANS, J. MARTIN, F. MARZANO, K. MAZUMDAR, R. MCNEIL, S. MELE, L. MEROLA, M. MESCHINI, W. METZGER, A. 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BELLERIVE, G. BENELLI, S. BETHKE, O. BIEBEL, O. BOERIU, P. BOCK, M. BOUTEMEUR, S. BRAIBANT, L. BRIGLIADORI, R. BROWN, K. BUESSER, H. BURCKHART, S. CAMPANA, R. CARNEGIE, A. CARTER, J. CARTER, C. CHANG, D. CHARLTON, C. CIOCCA, A. CSILLING, M. CUFFIANI, S. DADO, S. DE JONG, A. DE ROECK, E.A. DE WOLF, K. DESCH, B. DIENES, M. DONKERS, J. DUBBERT, E. DUCHOVNI, G. DUCKECK, I. DUERDOTH, E. ETZION, F. FABBRI, L. FELD, P. FERRARI, F. FIEDLER, I. FLECK, M. FORD, A. FREY, P. GAGNON, J. GARY, S. GASCON-SHOTKIN, G. GAYCKEN, C. GEICH-GIMBEL, G. GIACOMELLI, P. GIACOMELLI, M. GIUNTA, J. GOLDBERG, E. GROSS, J. GRUNHAUS, M. GRUWE, P. GU, A. GUPTA, C. HAJDU, M. HAMANN, G. HANSON, A. HAREL, M. HAUSCHILD, C. HAWKES, R. HAWKINGS, R. HEMINGWAY, G. HERTEN, R. HEUER, J. HILL, K. HOFFMAN, D. HORVATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, U. JOST, P. JOVANOVIC, T. JUNK, N. KANAYA, J. KANZAKI, D. KARLEN, K. KAWAGOE, T. KAWAMOTO, R. KEELER, R. KELLOGG, B. KENNEDY, S. KLUTH, T. KOBAYASHI, M. KOBEL, S. KOMAMIYA, T. KRAMER, P. KRIEGER, J. VON KROGH, K. KRUGER, T. KUHL, M. KUPPER, G. LAFFERTY, H. LANDSMAN, D. LANSKE, J. LAYTER, D. LELLOUCH, J. LETTS, L. LEVINSON, J. LILLICH, S. LLOYD, F. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W. MADER, S. MARCELLINI, A. MARTIN, G. MASETTI, T. MASHIMO, P. MATTIG, J. MCKENNA, R. MCPHERSON, F. MEIJERS, W. MENGES, F. MERRITT, H. MES, N. MEYER, A. MICHELINI, S. MIHARA, G. MIKENBERG, D. MILLER, S. MOED, W. MOHR, T. MORI, A. MUTTER, K. NAGAI, I. NAKAMURA, H. NANJO, H. NEAL, R. NISIUS, S. O'NEALE, A. OH, M. OREGLIA, S. ORITO, C. PAHL, G. PASZTOR, J. PATER, J. PILCHER, J. PINFOLD, D. PLANE, B. POLI, O. POOTH, M. PRZYBYCIEN, A. QUADT, K. RABBERTZ, C. REMBSER, P. RENKEL, J. RONEY, Y. ROZEN, K. RUNGE, K. SACHS, T. SAEKI, E. SARKISIAN, A. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCHORNER-SADENIUS, MATTHIAS SCHRODER, M. SCHUMACHER, W. SCOTT, R. SEUSTER, T. SHEARS, B. SHEN, P. SHERWOOD, A. SKUJA, A. SMITH, R. SOBIE, S. SOLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STROHMER, S. TAREM, M. TASEVSKY, R. TEUSCHER, M. THOMSON, E. TORRENCE, D. TOYA, P. TRAN, I. TRIGGER, Z. TROCSANYI, E. TSUR, M. TURNER-WATSON, I. UEDA, B. UJVARI, C. VOLLMER, P. VANNEREM, R. VERTESI, M. VERZOCCHI, H. VOSS, J. VOSSEBELD, C. WARD, D. WARD, P. WATKINS, A. WATSON, N. WATSON, P. WELLS, T. WENGLER, N. WERMES, G. WILSON, J. WILSON, G. WOLF, T. WYATT, S. YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, S. HEINEMEYER, A. PILAFTSIS, and G. WEIGLEIN
Subjects: Aleph, PARTICLE PHYSICS, LARGE ELECTRON POSITRON COLLIDER, ALEPH, DELPHI, L3, OPAL, Physics and Astronomy (miscellaneous), Parameter space, 01 natural sciences, OPAL DETECTOR, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Event (probability theory), Boson, Physics, EXPLICIT CP VIOLATION, ROOT-S=189 GEV, FLAVOR INDEPENDENT SEARCH, Particle physics - Experiment, Settore FIS/01 - Fisica Sperimentale, Higgs particle. search for, SUPERGAUGE TRANSFORMATIONS, ALEPH DELPHI L3 OPAL, SUPERSYMMETRIC STANDARD MODEL, ROOT-S, Higgs boson, Particle physics, electron positron. colliding beams, electron positron. annihilation, FOS: Physical sciences, supersymmetric standard model, explicit cp violation, electric-dipole moment, e(+)e(-) collisions, root-s=189 gev, opal detector, root-s, z(0) decays, supergauge transformations, radiative-corrections, Higgs particle. electroproduction, ddc:500.2, ELECTRIC-DIPOLE MOMENT, E(+)E(-) COLLISIONS, Z(0) DECAYS, Higgs particle, LEP collider, Next-to-Minimal Supersymmetric Standard Model, Consistency (statistics), 0103 physical sciences, ddc:530, High Energy Physics, 010306 general physics, Engineering (miscellaneous), electron positron, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Higgs Boson, LEP, HIGGS, Higgs boson, standard model, Experimental High Energy Physics, High Energy Physics::Experiment, MSSM, Minimal Supersymmetric Standard Model, Higgs
Abstract: The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric Standard Model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number of "benchmark" models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large exclusions in the MSSM parameter space. Absolute limits are set on the parameter tanb and, in some scenarios, on the masses of neutral Higgs bosons., 81 pages, 22 figures, Submitted to Euro. Phys. J. C
Published: 2006

5. Tests of the standard model and constraints on new physics from measurements of fermion-pair production at 189-209 GeV at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, C.CIOCCA, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, and OPAL Collaboration
Subjects: Physics, Particle physics, Top quark, Muon, Physics and Astronomy (miscellaneous), Electron–positron annihilation, High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pair production, Chargino, Neutralino, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Event generator
Abstract: Cross-section and angular distributions for hadronic and lepton-pair final states in e+e- collisions at centre-of-mass energies between 189 GeV and 209 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. The measurements are used to determine the electromagnetic coupling constant alphaem at LEP2 energies. In addition, the results are used together with OPAL measurements at 91-183 GeV within the S-matrix formalism to determine the gamma-Z interference term and to make an almost model-independent measurement of the Z mass. Limits on extensions to the Standard Model described by effective four-fermion contact interactions or the addition of a heavy Z boson are also presented., Comment: 79 pages, 22 figures, Submitted to Eur. Phys. J. C
Published: 2004

6. Search for associated production of massive states decaying into two photons in e+e− annihilations at =88–209 GeV

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Bloodworth, I.J., Boeriu, O., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Cammin, J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Cohen, I., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Dallison, S., De Roeck, A., De Wolf, E.A., Desch, K., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Elfgren, E., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hauschildt, J., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Homer, R.J., Horvath, D., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T.P., Komamiya, S., Kormos, Laura L., Kowalewski, Robert V., Kramer, T., Kress, T., Krieger, P., von Krogh, J., Krop, D., Kupper, M., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Marchant, T.E., Martin, A.J., Martin, J.P., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trefzger, T., Tricoli, A., Trigger, I., Trocsanyi, Z., Tsur, E., Turcot, A.S., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vachon, B., Vollmer, C.F., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zacek, V., Zer-Zion, D., Zivkovic, Lidija, and OPAL Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Scalar (mathematics), FOS: Physical sciences, Sigma, Context (language use), 01 natural sciences, High Energy Physics - Experiment, Gamma gamma, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Higgs boson, High Energy Physics::Experiment, Production (computer science), Limit (mathematics), 010306 general physics, Particle Physics - Experiment
Abstract: A search is performed for production of short-lived particles in e+e- -> XY, with X -> gamma gamma and Y -> ffbar, for scalar X and scalar or vector Y. Model-independent limits in the range of 25-60 femtobarns are presented on sigma (e+e- -> XY) x B(X -> ffbar) for centre-of-mass energies in the range 205-207 GeV. The data from all LEP centre-of-mass energies 88-209 GeV are also interpreted in the context of fermiophobic Higgs boson models, for which a lower mass limit of 105.5 GeV is obtained for a "benchmark" fermiophobic Higgs boson., 17 pages, 4 figures
Published: 2002

7. Measurement of the hadronic cross-section for the scattering of two virtual photons at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Bethke, S., Biebel, O., Bloodworth, I.J., Boeriu, O., Bock, P., Bohme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Cammin, J., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Clarke, P.E.L., Clay, E., Cohen, I., Couchman, J., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Dallison, S., De Roeck, A., De Wolf, E.A., Dervan, P., Desch, K., Dienes, B., Dixit, M.S., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Futyan, D.I., Gagnon, P., Gary, J.W., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Glenzinski, D., Goldberg, J., Graham, K., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hauschildt, J., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Homer, R.J., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jawahery, A., Jeremie, H., Jones, C.R., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T.P., Komamiya, S., Kowalewski, Robert V., Kramer, T., Kress, T., Krieger, P., von Krogh, J., Krop, D., Kuhl, T., Kupper, M., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Lawson, I., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Littlewood, C., Lloyd, S.L., Loebinger, F.K., Long, G.D., Losty, M.J., Lu, J., Ludwig, J., Macchiolo, A., Macpherson, A., Mader, W., Marcellini, S., Marchant, T.E., Martin, A.J., Martin, J.P., Martinez, G., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.John, McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Rodning, N., Roney, J.M., Rosati, S., Roscoe, K., Rozen, Y., Runge, K., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E.K.G., Sbarra, C., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Skuja, A., Smith, A.M., Snow, G.A., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Spano, F., Sproston, M., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Stumpf, L., Surrow, B., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomas, J., Thomson, M.A., Torrence, E., Toya, D., Trefzger, T., Tricoli, A., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vachon, B., Vollmer, C.F., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wyatt, T.R., Yamashita, S., Zacek, V., Zer-Zion, D., G., Abbiendi, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, G., Anagnostou, K. J., Anderson, S., Arcelli, S., Asai, D., Axen, G., Azuelo, I., Bailey, E., Barberio, R. J., Barlow, R. J., Batley, T., Behnke, K. W., Bell, P. J., Bell, G., Bella, A., Bellerive, S., Bethke, O., Biebel, I. J., Bloodworth, O., Boeriu, P., Bock, J., Bohme, D., Bonacorsi, M., Boutemeur, S., Braibant, L., Brigliadori, R. M., Brown, H. J., Burckhart, J., Cammin, R. K., Carnegie, B., Caron, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, P. E., L., E., Clay, I., Cohen, J., Couchman, A., Csilling, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., De Roeck, E. A., De, P., Dervan, K., Desch, B., Diene, M. S., Dixit, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, E., Etzion, F., Fabbri, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, D., Glenzinski, J., Goldberg, K., Graham, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, A., Gupta, C., Hajdu, M., Hamann, G. G., Hanson, K., Harder, A., Harel, M., Harin Dirac, M., Hauschild, J., Hauschildt, C. M., Hawke, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, J. C., Hill, K., Hoffman, R. J., Homer, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, A., Jawahery, H., Jeremie, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapetian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, S., Kluth, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, R. V., Kowalewski, T., Kramer, T., Kre, P., Krieger, J., von Krogh, D., Krop, T., Kuhl, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, I., Lawson, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, J., Lillich, C., Littlewood, S. L., Lloyd, F. K., Loebinger, G. D., Long, M. J., Losty, J., Lu, J., Ludwig, A., Macchiolo, A., Macpherson, W., Mader, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, G., Masetti, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenzo, W., Menge, F. S., Merritt, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, S., Moed, W., Mohr, T., Mori, A., Mutter, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, C., Pahl, G., Pasztor, J. R., Pater, G. N., Patrick, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, M., Przybycien, A., Quadt, K., Rabbertz, C., Rembser, P., Renkel, H., Rick, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, Y., Rozen, K., Runge, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., C., Sbarra, A. D., Schaile, O., Schaile, P., Scharff Hansen, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, A., Skuja, A. M., Smith, G. A., Snow, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, F., Spano, M., Sproston, A., Stahl, K., Stephen, D., Strom, R., Strohmer, L., Stumpf, B., Surrow, S., Tarem, M., Tasevsky, R. J., Taylor, R., Teuscher, J., Thoma, M. A., Thomson, E., Torrence, D., Toya, T., Trefzger, A., Tricoli, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, B., Ujvari, B., Vachon, C. F., Vollmer, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, A. T., Watson, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, and D., Zer Zion
Subjects: Quark, Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Hadron, Monte Carlo method, FOS: Physical sciences, Virtual particle, Parton, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Cross section (physics), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: The interaction of virtual photons is investigated using the reaction e+e- -> e+e- hadrons based on data taken by the OPAL experiment at e+e- centre-of-mass energies sqrt(s_ee)=189-209 GeV, for W>5 GeV and at an average Q^2 of 17.9 GeV^2. The measured cross-sections are compared to predictions of the Quark Parton Model (QPM), to the Leading Order QCD Monte Carlo model PHOJET to the NLO prediction for the reaction e+e- -> e+e-qqbar, and to BFKL calculations. PHOJET, NLO e+e- -> e+e-qqbar, and QPM describe the data reasonably well, whereas the cross-section predicted by a Leading Order BFKL calculation is too large., 30 pages, 10 figures, Submitted to Eur.Phys.J. C
Published: 2002

8. Search for doubly charged Higgs bosons with the OPAL detector at LEP

Author: Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Allison, J., Anagnostou, G., Anderson, K. J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R. J., Batley, R. J., Bechtle, P., Behnke, T., Bell, K. W., Bell, P. J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Bloodworm, I. J., Boeriu, O., Bock, P., Böhme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, R. M., Burckhart, H. J., Cammin, J., Campana, S., Carnegie, R. K., Caron, B., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Clarke, P. E. L., Clay, E., Cohen, I., Couchman, J., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G. M., Dallison, S., Roeck, A., Woif, E. A., Dervan, P., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Fürtjes, A., Futyan, D. I., Gagnon, P., Gary, J. W., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Paolo Giacomelli, Giunta, M., Goldberg, J., Graham, K., Gross, E., Grunhaus, J., Gruwé, M., Günther, P. O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hauschildt, J., Hawkes, C. M., Hawkings, R., Hemingways, R. J., Hensel, C., Herten, G., Heuer, R. D., Hill, J. C., Hoffman, K., Homer, R. J., Horváth, D., Hossain, K. R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jawahery, A., Jeremie, H., Jones, C. R., Jovanovic, P., Junk, T. R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kimr, D. H., Kleine, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T. P., Komamiya, S., Kowalewski, R. V., Krämer, T., Kress, T., Krieger, P., Krogh, J., Krop, D., Kuhl, T., Küpper, M., Kyberd, P., Lafferty, G. D., Landsman, H., Lanske, D., Lawson, I., Layter, J. G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Littlewood, C., Lloyd, S. L., Loebinger, F. K., Lu, J., Ludwig, J., Macchiolo, A., Macpherson, A., Mader, W., Marcellini, S., Marchant, T. E., Martin, A. J., Martin, J. P., Martinez, G., Masetti, G., Mashimo, T., Mättig, P., Mcdonald, W. J., Mckenna, J., Mcmahon, T. J., Mcpherson, R. A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, E. S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Neal, H. A., Nisius, R., O Neale, S. W., Oh, A., Okpara, A., Oreglia, M. J., Orito, S., Pahl, C., Pásztor, G., Pater, J. R., Patrick, G. N., Pilcher, J. E., Pinfold, J., Plane, D. E., Poli, B., Polok, J., Pooth, O., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Rodning, N., Roney, J. M., Rosati, S., Roscoe, K., Rozen, Y., Runge, K., Rust, D. R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E. K. G., Schaue, A. D., Schaue, O., Scharff-Hansen, P., Schröder, M., Schumacher, M., Schwick, C., Scott, W. G., Seuster, R., Shears, T. G., Shen, B. C., Shepherd-Themistocleous, C. H., Sherwood, P., Skuja, A., Smith, A. M., Snow, G. A., Sobie, R., Söldner-Rembold, S., Spagnolo, S., Spano, F., Sproston, M., Stahl, A., Stephens, K., Strom, D., Ströhmer, R., Stumpf, L., Surrow, B., Tarem, S., Tasevsky, M., Taylor, R. J., Teuscher, R., Thomas, J., Thomson, M. A., Torrence, E., Toya, D., Trefzger, T., Tricoli, A., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M. F., Ueda, I., Ujvári, B., Vachon, B., Vollmer, C. F., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Weiterung, D., Wilson, G. W., Wilson, J. A., Wyatt, T. R., Yamashita, S., Zacek, V., Zer-Zion, D., G., Abbiendi, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, G., Anagnostou, K. J., Anderson, S., Arcelli, S., Asai, D., Axen, G., Azuelo, I., Bailey, E., Barberio, R. J., Barlow, R. J., Batley, P., Bechtle, T., Behnke, K. W., Bell, P. J., Bell, G., Bella, A., Bellerive, G., Benelli, S., Bethke, O., Biebel, I. J., Bloodworth, O., Boeriu, P., Bock, J., Bohme, D., Bonacorsi, M., Boutemeur, S., Braibant, L., Brigliadori, R. M., Brown, H. J., Burckhart, J., Cammin, S., Campana, R. K., Carnegie, B., Caron, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, P. E., L., E., Clay, I., Cohen, J., Couchmann, A., Csilling, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., De Roeck, E. A., De, P., Dervan, K., Desch, B., Diene, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, E., Etzion, F., Fabbri, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, M., Giunta, J., Goldberg, K., Graham, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, A., Gupta, C., Hajdu, M., Hamann, G. G., Hanson, K., Harder, A., Harel, M., Harin Dirac, M., Hauschild, J., Hauschildt, C. M., Hawke, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, J. C., Hill, K., Hoffman, R. J., Homer, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, A., Jawahery, H., Jeremie, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapetian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, S., Kluth, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, R. V., Kowalewski, T., Kramer, T., Kre, P., Krieger, J., von Krogh, D., Krop, T., Kuhl, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, I., Lawson, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, J., Lillich, C., Littlewood, S. L., Lloyd, F. K., Loebinger, J., Lu, J., Ludwig, A., Macchiolo, A., Macpherson, W., Mader, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, G., Masetti, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenzo, W., Menge, F. S., Merritt, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, S., Moed, W., Mohr, T., Mori, A., Mutter, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, C., Pahl, G., Pasztor, J. R., Pater, G. N., Patrick, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, A., Quadt, K., Rabbertz, C., Rembser, P., Renkel, H., Rick, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, Y., Rozen, K., Runge, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., A. D., Schaile, O., Schaile, P., Scharff Hansen, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, A., Skuja, A. M., Smith, G. A., Snow, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, F., Spano, M., Sproston, A., Stahl, K., Stephen, D., Strom, R., Strohmer, L., Stumpf, B., Surrow, S., Tarem, M., Tasevsky, R. J., Taylor, R., Teuscher, J., Thoma, M. A., Thomson, E., Torrence, D., Toya, T., Trefzger, A., Tricoli, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, B., Ujvari, B., Vachon, C. F., Vollmer, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, A. T., Watson, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, D., Zer Zion, and OPAL Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Detector, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Higgs boson, High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment, Boson
Abstract: A search for pair-produced doubly charged Higgs bosons has been performed using data samples corresponding to an integrated luminosity of about 614 pb-1 collected with the OPAL detector at LEP at centre-of-mass energies between 189GeV and 209GeV. No evidence for a signal has been observed. A mass limit of 98.5GeV/c2 at the 95% confidence level has been set for the doubly charged Higgs particle in left-right symmetric models. This is the first search for doubly charged Higgs bosons at centre-of-mass energies larger than 91GeV., Comment: 19 pages, 4 figures, Submitted to Phys. Lett. B
Published: 2002

9. Measurement of the mass and width of the W boson in e+e− collisions at 189 GeV

Author: Abbiendi, G., Ackerstaff, K., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Anderson, K.J., Arcelli, S., Asai, S., Ashby, S.F., Axen, D., Azuelos, G., Bailey, I., Ball, A.H., Barberio, E., Barlow, Roger J., Baumann, S., Behnke, T., Bell, Kenneth Watson, Bella, G., Bellerive, A., Benelli, G., Bentvelsen, S., Bethke, S., Biebel, O., Bloodworth, I.J., Boeriu, O., Bock, P., Bohme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Cammin, J., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Clarke, P.E.L., Clay, E., Cohen, I., Cooke, O.C., Couchman, J., Couyoumtzelis, C., Coxe, R.L., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Dallison, S., de Roeck, A., de Wolf, E., Dervan, P., Desch, K., Dienes, B., Dixit, M.S., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Estabrooks, P.G., Etzion, E., Fabbri, F., Fanti, M., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Futyan, D.I., Gagnon, P., Gary, J.W., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Glenzinski, D., Goldberg, J., Grandi, C., Graham, K., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Hajdu, C., Hanson, G.G., Hansroul, M., Hapke, M., Harder, K., Harel, A., Harin-Dirac, M., Hauke, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hocker, James Andrew, Hoffman, Kara Dion, Homer, R.J., Honma, A.K., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jacob, F.R., Jawahery, A., Jeremie, H., Jones, C.R., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T.P., Komamiya, S., Kowalewski, Robert V., Kress, T., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Lawson, I., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Liebisch, R., Lillich, J., List, B., Littlewood, C., Lloyd, A.W., Lloyd, S.L., Loebinger, F.K., Long, G.D., Losty, M.J., Lu, J., Ludwig, J., Macchiolo, A., Macpherson, A., Mader, W., Marcellini, S., Marchant, T.E., Martin, A.J., Martin, J.P., Martinez, G., Mashimo, T., Mattig, Peter, McDonald, W.John, McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oakham, F.G., Odorici, F., Ogren, H.O., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pasztor, G., Pater, J.R., Patrick, G.N., Patt, J., Pfeifenschneider, P., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rembser, C., Renkel, P., Rick, H., Rodning, N., Roney, J.M., Rosati, S., Roscoe, K., Rossi, A.M., Rozen, Y., Runge, K., Runolfsson, O., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E.K.G., Sbarra, C., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G.P., Skuja, A., Smith, A.M., Snow, G.A., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Sproston, M., Stahl, A., Stephens, K., Stoll, K., Strom, David M., Strohmer, R., Stumpf, L., Surrow, B., Talbot, S.D., Tarem, S., Taylor, R.J., Teuscher, R., Thiergen, M., Thomas, J., Thomson, M.A., Torrence, E., Towers, S., Toya, D., Trefzger, T., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Vachon, B., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., White, J.S., Wilson, G.W., Wilson, J.A., Wyatt, T.R., Yamashita, S., Zacek, V., Zer-Zion, D., G., Abbiendi, K., Ackerstaff, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, K. J., Anderson, S., Arcelli, S., Asai, S. F., Ashby, D., Axen, G., Azuelo, I., Bailey, A. H., Ball, E., Barberio, R. J., Barlow, S., Baumann, T., Behnke, K. W., Bell, G., Bella, A., Bellerive, G., Benelli, S., Bentvelsen, S., Bethke, O., Biebel, I. J., Bloodworth, O., Boeriu, P., Bock, J., Bohme, D., Bonacorsi, M., Boutemeur, S., Braibant, P., Bright Thoma, L., Brigliadori, R. M., Brown, H. J., Burckhart, J., Cammin, P., Capiluppi, R. K., Carnegie, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, P. E., L., E., Clay, I., Cohen, O. C., Cooke, J., Couchman, C., Couyoumtzeli, R. L., Coxe, A., Csilling, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., de Roeck, E., de Wolf, P., Dervan, K., Desch, B., Diene, M. S., Dixit, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, P. G., Estabrook, E., Etzion, F., Fabbri, M., Fanti, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, D., Glenzinski, J., Goldberg, C., Grandi, K., Graham, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, C., Hajdu, G. G., Hanson, M., Hansroul, M., Hapke, K., Harder, A., Harel, M., Harin Dirac, A., Hauke, M., Hauschild, C. M., Hawke, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, J. C., Hill, A., Hocker, K., Hoffman, R. J., Homer, A. K., Honma, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, F. R., Jacob, A., Jawahery, H., Jeremie, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapetian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, S., Kluth, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, R. V., Kowalewski, T., Kre, P., Krieger, J., von Krogh, T., Kuhl, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, I., Lawson, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, R., Liebisch, J., Lillich, B., List, C., Littlewood, A. W., Lloyd, S. L., Lloyd, F. K., Loebinger, G. D., Ling, M. J., Losty, J., Lu, J., Ludwig, A., Macchiolo, A., Macpherson, W., Mader, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenzo, W., Menge, F. S., Merritt, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, W., Mohr, A., Montanari, T., Mori, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, F. G., Oakham, F., Odorici, H. O., Ogren, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, G., Pasztor, J. R., Pater, G. N., Patrick, J., Patt, P., Pfeifenschneider, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, M., Przybycien, A., Quadt, C., Rembser, P., Renkel, H., Rick, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, A. M., Rossi, Y., Rozen, K., Runge, O., Runolfsson, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., C., Sbarra, A. D., Schaile, O., Schaile, P., Scharff Hansen, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, G. P., Siroli, A., Skuja, A. M., Smith, G. A., Snow, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, M., Sproston, A., Stahl, K., Stephen, K., Stoll, D., Strom, R., Strohmer, L., Stumpf, B., Surrow, S. D., Talbot, S., Tarem, R. J., Taylor, R., Teuscher, M., Thiergen, J., Thoma, M. A., Thomson, E., Torrence, S., Tower, D., Toya, T., Trefzger, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, B., Vachon, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, A. T., Watson, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, J. S., White, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, D., Zer Zion, and OPAL Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electroweak interaction, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics, Particle Physics - Experiment
Abstract: The mass and width of the W boson are determined in e+e- collisions at LEP using 183 pb^-1 of data recorded at a centre-of-mass energy roots=189 GeV with the OPAL detector. The invariant mass distributions from 970 WW->qqqq and 1118 WW->qqln candidate events are used to measure the mass of the W boson, Mw = 80.451 +- 0.076(stat.) +- 0.049(syst.) GeV. A direct measurement of the width of the W boson gives Gw=2.09 +- 0.18(stat.) +- 0.09(syst.) GeV. The results are combined with previous OPAL results from 78 pb^-1 of data recorded with roots from 161 to 183 GeV, to obtain: Mw = 80.432 +- 0.066(stat.) +- 0.045(syst.) GeV, Gw = 2.04 +- 0.16(stat.) +- 0.09(syst.) GeV. The consistency of the direct measurement of Mw with that inferred from other measurements of electroweak parameters provides an important test of the Standard Model of electroweak interactions., 24 pages, 4 figures, submitted to Phys. Lett. B
Published: 2001

10. Charged multiplicities in Z decays into u, d, and s Quarks

Author: Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Allison, J., Anagnostou, G., Anderson, K. J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Ball, A. H., Barberio, E., Barlow, R. J., Behnke, T., Bell, K. W., Bella, G., Bellerive, A., Benelli, G., Bentvelsen, S., Bethke, S., Biebel, O., Bloodworth, I. J., Boeriu, O., Bock, P., Böhme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, R. M., Burckhart, H. J., Cammin, J., Capiluppi, P., Carnegie, R. K., Caron, B., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Clarke, P. E. L., Clay, E., Cohen, I., Cooke, O. C., Couchman, J., Coxe, R. L., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G. M., Dallison, S., Roeck, A., Wolf, E. A., Dervan, P., Desch, K., Dienes, B., Dixit, M. S., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I. P., Estabrooks, P. G., Etzion, E., Fabbri, F., Fanti, M., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Fürtjes, A., Futyan, D. I., Gagnon, P., Gary, J. W., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Glenzinski, D., Goldberg, J., Grandi, C., Graham, K., Gross, E., Grunhaus, J., Gruwé, M., Günther, P. O., Hajdu, C., Hanson, G. G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C. M., Hawkings, R., Hemingway, R. J., Hensel, C., Herten, G., Heuer, R. D., Hill, J. C., Hocker, A., Hoffman, K., Homer, R. J., Honma, A. K., Horváth, D., Hossain, K. R., Howard, R., Hüntemeyer, P., Igo-Kemenes, P., Ishii, K., Jacob, F. R., Jawahery, A., Jeremie, H., Jones, C. R., Jovanovic, P., Junk, T. R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kiyotomo Kawagoe, Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kim, D. H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T. P., Komamiya, S., Kowalewski, R. V., Kress, T., Krieger, P., Krogh, J., Krop, D., Kuhl, T., Kupper, M., Kyberd, P., Lafferty, G. D., Landsman, H., Lanske, D., Lawson, I., Layter, J. G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Liebisch, R., Lillich, J., Littlewood, C., Lloyd, A. W., Lloyd, S. L., Loebinger, F. K., Long, G. D., Losty, M. J., Lu, J., Ludwig, J., Macchiolo, A., Macpherson, A., Mader, W., Marcellini, S., Marchant, T. E., Martin, A. J., Martin, J. P., Martinez, G., Mashimo, T., Mättig, P., Mcdonald, W. J., Mckenna, J., Mcmahon, T. J., Mcpherson, R. A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, F. S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, H. A., Nisius, R., O Neale, S. W., Oakham, F. G., Odorici, F., Oh, A., Okpara, A., Oreglia, M. J., Orito, S., Pásztor, G., Pater, J. R., Patrick, G. N., Pfeifenschneider, P., Pilcher, J. E., Pinfold, J., Plane, D. E., Poli, B., Polok, J., Pooth, O., Przybycień, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Rodning, N., Roney, J. M., Rosati, S., Roscoe, K., Rossi, A. M., Rozen, Y., Runge, K., Runolfsson, O., Rust, D. R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E. K. G., Sbarra, C., Schaile, A. D., Schaile, O., Scharff-Hansen, P., Schröder, M., Schumacher, M., Schwick, C., Scott, W. G., Seuster, R., Shears, T. G., Shen, B. C., Shepherd-Themistocleous, C. H., Sherwood, P., Siroli, G. P., Skuja, A., Smith, A. M., Snow, G. A., Sobie, R., Söldner-Rembold, S., Spagnolo, S., Sproston, M., Stahl, A., Stephens, K., Stoll, K., Strom, D., Ströhmer, R., Stumpf, L., Surrow, B., Talbot, S. D., Tarem, S., Taylor, R. J., Teuscher, R., Thomas, J., Thomson, M. A., Tönnesmann, M., Torrence, E., Towers, S., Toya, D., Trefzger, T., Trigger, I., Trócsányi, Z., Tsur, E., Turner-Watson, M. F., Ueda, I., Vachon, B., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Wetterling, D., White, J. S., Wilson, G. W., Wilson, J. A., Wyatt, T. R., Yamashita, S., Zacek, V., Zer-Zion, D., G., Abbiendi, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, G., Anagnostou, K. J., Anderson, S., Arcelli, S., Asai, D., Axen, G., Azuelo, I., Bailey, A. H., Ball, E., Barberio, R. J., Barlow, T., Behnke, K. W., Bell, G., Bella, A., Bellerive, G., Benelli, S., Bentvelsen, S., Bethke, O., Biebel, I. J., Bloodworth, O., Boeriu, P., Bock, J., Bohme, D., Bonacorsi, M., Boutemeur, S., Braibant, P., Bright Thoma, L., Brigliadori, R. M., Brown, H. J., Burckhart, J., Cammin, P., Capiluppi, R. K., Carnegie, B., Caron, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, P. E., L., E., Clay, I., Cohen, O. C., Cooke, J., Couchman, R. L., Coxe, A., Csilling, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., De Roeck, E. A., De, P., Dervan, K., Desch, B., Diene, M. S., Dixit, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, P. G., Estabrook, E., Etzion, F., Fabbri, M., Fanti, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, D., Glenzinski, J., Goldberg, C., Grandi, K., Graham, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, C., Hajdu, G. G., Hanson, K., Harder, A., Harel, M., Harin Dirac, M., Hauschild, C. M., Hawke, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, J. C., Hill, A., Hocker, K., Hoffman, R. J., Homer, A. K., Honma, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, F. R., Jacob, A., Jawahery, H., Jeremie, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapentian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, S., Kluth, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, R. V., Kowalewski, T., Kre, P., Krieger, J., von Krogh, D., Krop, T., Kuhl, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, I., Lawson, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, R., Liebisch, J., Lillich, C., Littlewood, A. W., Lloyd, S. L., Lloyd, F. K., Loebinger, G. D., Long, M. J., Losty, J., Lu, J., Ludwig, A., Macchiolo, A., Macpherson, W., Mader, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, T., Mashimo, P., Mattig, W. J., Mcdonald, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, W., Mohr, A., Montanari, T., Mori, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, F. G., Oakham, F., Odorici, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, G., Pasztor, J. R., Pater, G. N., Patrick, P., Pfeifenschneider, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, M., Przybycien, A., Quadt, K., Rabbertz, C., Rembser, P. O., Renkel, H., Rick, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, A. M., Rossi, Y., Rozen, K., Runge, O., Runolfsson, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., C., Sbarra, A. D., Schaile, O., Schaile, P., Scharff Hansen, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, G. P., Siroli, A., Skuja, A. M., Smith, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, M., Sproston, A., Stahl, K., Stephen, K., Stoll, D., Strom, R., Strohmer, L., Stumpf, B., Surrow, S. D., Talbot, S., Tarem, R. J., Taylor, R., Teuscher, J., Thoma, M. A., Thomson, M., Tonnesmann, E., Torrence, S., Tower, D., Toya, T., Trefzger, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, B., Vachon, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, J. S., White, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, and D., Zer Zion
Subjects: Quark, Physics, Particle physics, Strange quark, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Hadron, Strong interaction, Flavour, FOS: Physical sciences, 01 natural sciences, Charged particle, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Particle, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, Boson
Abstract: About 4.4 million hadronic decays of Z bosons, recorded by the OPAL detector at LEP at a centre-of-mass energy of around sqrt(s) = 91.2 GeV, are used to determine the mean charged particle multiplicities for the three light quark flavours. Events from primary u, d, and s quarks are tagged by selecting characteristic particles which carry a large fraction of the beam energy. The charged particle multiplicities are measured in the hemispheres opposite to these particles. An unfolding procedure is applied to obtain these multiplicities for each primary light quark flavour. This yields = 17.77 +- 0.51 +0.86 -1.20, = 21.44 +- 0.63 +1.46 -1.17, = 20.02 +- 0.13 +0.39 -0.37, where statistical and systematic errors are given. The results for and are almost fully statistically anti-correlated. Within the errors the result is consistent with the flavour independence of the strong interaction for the particle multiplicities in events from the light up, down, and strange quarks., Comment: 24 pages, 3 figures, submitted to Eur. Phys. J. C
Published: 2001

11. Multiplicities of $\pi^0, \eta,\rm K^0$ and of charged particles in quark and gluon jets

Author: Abbiendi, G., Ackerstaff, K., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Anderson, K.J., Arcelli, S., Asai, S., Ashby, S.F., Axen, D., Azuelos, G., Bailey, I., Ball, A.H., Barberio, E., Barlow, Roger J., Batley, J.R., Baumann, S., Behnke, T., Bell, Kenneth Watson, Bella, G., Bellerive, A., Bentvelsen, S., Bethke, S., Biebel, O., Bloodworth, I.J., Bock, P., Bohme, J., Boeriu, O., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Cammin, J., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Ciocca, C., Clarke, P.E.L., Clay, E., Cohen, I., Cooke, O.C., Couchman, J., Couyoumtzelis, C., Coxe, R.L., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Dallison, S., de Roeck, A., Dervan, P., Desch, K., Dienes, B., Dixit, M.S., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Estabrooks, P.G., Etzion, E., Fabbri, F., Fanti, M., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Futyan, D.I., Gagnon, P., Gary, J.W., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Glenzinski, D., Goldberg, J., Grandi, C., Graham, K., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Hajdu, C., Hanson, G.G., Hansroul, M., Hapke, M., Harder, K., Harel, A., Hargrove, C.K., Harin-Dirac, M., Hauke, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hildreth, M.D., Hill, J.C., Hocker, James Andrew, Hoffman, Kara Dion, Homer, R.J., Honma, A.K., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jacob, F.R., Jawahery, A., Jeremie, H., Jones, C.R., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kobayashi, T., Kobel, M., Kokott, T.P., Komamiya, S., Kowalewski, Robert V., Kress, T., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Lawson, I., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Liebisch, R., Lillich, J., List, B., Littlewood, C., Lloyd, A.W., Lloyd, S.L., Loebinger, F.K., Long, G.D., Losty, M.J., Lu, J., Ludwig, J., Macchiolo, A., Macpherson, A., Mader, W., Mannelli, M., Marcellini, S., Marchant, T.E., Martin, A.J., Martin, J.P., Martinez, G., Mashimo, T., Mattig, Peter, McDonald, W.John, McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oakham, F.G., Odorici, F., Ogren, H.O., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pasztor, G., Pater, J.R., Patrick, G.N., Patt, J., Pfeifenschneider, P., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rembser, C., Rick, H., Robins, S.A., Rodning, N., Roney, J.M., Rosati, S., Roscoe, K., Rossi, A.M., Rozen, Y., Runge, K., Runolfsson, O., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E.K.G., Sbarra, C., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schmitt, S., Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G.P., Skuja, A., Smith, A.M., Snow, G.A., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Sproston, M., Stahl, A., Stephens, K., Stoll, K., Strom, David M., Strohmer, R., Surrow, B., Talbot, S.D., Tarem, S., Taylor, R.J., Teuscher, R., Thiergen, M., Thomas, J., Thomson, M.A., Torrence, E., Towers, S., Trefzger, T., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., White, J.S., Wilson, G.W., Wilson, J.A., Wyatt, T.R., Yamashita, S., Zacek, V., Zer-Zion, D., G., Abbiendi, K., Ackerstaff, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, K. J., Anderson, S., Arcelli, S., Asai, S. F., Ashby, D., Axen, G., Azuelo, I., Bailey, A. H., Ball, E., Barberio, R. J., Barlow, J. R., Batley, S., Baumann, T., Belmke, K. W., Bell, G., Bella, A., Bellerive, S., Bentvelsen, S., Bethke, O., Biebel, I. J., Bloodworth, P., Bock, J., Bohme, O., Boeriu, D., Bonacorsi, M., Boutemeur, S., Braidant, P., Bright Thoma, L., Brigliadori, R. M., Brown, H. J., Burckhart, J., Cammin, P., Capiluppi, R. K., Carnegie, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, C., Ciocca, P. E., L., E., Clay, I., Cohen, O. C., Cooke, J., Couchman, C., Couyoumtzeli, R. L., Coxe, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., de Roeck, P., Dervan, K., Desch, B., Diene, M. S., Dixit, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, P. G., Estabrook, E., Etzion, F., Fabbri, M., Fanti, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, D., Glenzinski, J., Goldberg, C., Grandi, K., Graham, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, C., Hajdu, G. G., Hanson, M., Hansroul, M., Hapke, K., Harder, A., Harel, C. K., Hargrove, M., Harin Dirac, A., Hauke, M., Hauschild, C. M., Hawke, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, M. D., Hildreth, J. C., Hill, A., Hocker, K., Hoffman, R. J., Homer, A. K., Honma, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, F. R., Jacob, A., Jawahery, H., Jeremie, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapetian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, R. V., Kowalewski, T., Kre, P., Krieger, J., von Krogh, T., Kuhl, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, I., Lawson, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, R., Liebisch, J., Lillich, B., List, C., Littlewood, A. W., Lloyd, S. L., Lloyd, F. K., Loebinger, G. D., Long, M. J., Losty, J., Lu, J., Ludwig, A., Macchiolo, A., Macpherson, W., Mader, M., Mannelli, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenzo, F. S., Merritt, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, W., Mohr, A., Montanari, T., Mori, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, F. G., Oakham, F., Odorici, H. O., Ogren, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, G., Pasztor, J. R., Pater, G. N., Patrick, J., Patt, P., Pfeifenschneider, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, M., Przybycien, A., Quadt, C., Rembser, H., Rick, S. A., Robin, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, A. M., Rossi, Y., Rozen, K., Runge, O., Runolfsson, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., C., Sbarra, A. D., Schaile, O., Schaile, P., Scharff Hansen, S., Schmitt, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shephard Themistocleou, P., Sherwood, G. P., Siroli, A., Skuja, A. M., Smith, G. A., Snow, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, M., Sproston, A., Stahl, K., Stephen, K., Stoll, D., Strom, R., Strohmer, B., Surrow, S. D., Talbot, S., Tarem, R. J., Taylor, R., Teuscher, M., Thiergen, J., Thoma, M. A., Thomson, E., Torrence, S., Tower, T., Trefzger, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, A. T., Watson, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, J. S., White, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, and D., Zer Zion
Subjects: Quark, Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, Eta meson, Multiplicity (mathematics), 01 natural sciences, Charged particle, Gluon, 13. Climate action, 0103 physical sciences, Particle, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: We compared the multiplicities of pizero, eta, Kzero and of charged particles in quark and gluon jets in 3-jet events, as measured by the OPAL experiment at LEP. The comparisons were performed for distributions unfolded to 100% pure quark and gluon jets, at an effective scale Qjet which took into account topological dependences of the 3-jet environment. The ratio of particle multiplicity in gluon jets to that in quark jets as a function of Qjet for pizero, eta and Kzero was found to be independent of the particle species. This is consistent with the QCD prediction that the observed enhancement in the mean particle rate in gluon jets with respect to quark jets should be independent of particle species. In contrast to some theoretical predictions and previous observations, we observed no evidence for an enhancement of eta meson production in gluon jets with respect to quark jets, beyond that observed for charged particles. We measured the ratio of the slope of the average charged particle multiplicity in gluon jets to that in quark jets, C, and we compared it to a next-to-next-to-next-to leading order calculation. Our result, C=2.27+-0.20(stat+syst),is about one standard deviation higher than the perturbative prediction. We compared the multiplicities of pizero, eta, Kzero and of charged particles in quark and gluon jets in 3-jet events, as measured by the OPAL experiment at LEP. The comparisons were performed for distributions unfolded to 100% pure quark and gluon jets, at an effective scale Qjet which took into account topological dependences of the 3-jet environment. The ratio of particle multiplicity in gluon jets to that in quark jets as a function of Qjet for pizero, eta and Kzero was found to be independent of the particle species. This is consistent with the QCD prediction that the observed enhancement in the mean particle rate in gluon jets with respect to quark jets should be independent of particle species. In contrast to some theoretical predictions and previous observations, we observed no evidence for an enhancement of eta meson production in gluon jets with respect to quark jets, beyond that observed for charged particles. We measured the ratio of the slope of the average charged particle multiplicity in gluon jets to that in quark jets, C, and we compared it to a next-to-next-to-next-to leading order calculation. Our result, C=2.27+-0.20(stat+syst),is about one standard deviation higher than the perturbative prediction.
Published: 2000

12. A study of spin alignment of $\rho(770)^{\pm}$ and $\omega(782)$ mesons in hadronic Z $^0$ decays

Author: Abbiendi, G., Ackerstaff, K., Alexander, G., Allison, John, Altekamp, N., Anderson, K.J., Anderson, S., Arcelli, S., Asai, S., Ashby, S.F., Axen, D., Azuelos, G., Ball, A.H., Barberio, E., Barlow, Roger J., Batley, J.R., Baumann, S., Bechtluft, J., Behnke, T., Bell, Kenneth Watson, Bella, G., Bellerive, A., Bentvelsen, S., Bethke, S., Betts, S., Biebel, O., Biguzzi, A., Bloodworth, I.J., Bock, P., Bohme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Chrisman, D., Ciocca, C., Clarke, P.E.L., Clay, E., Cohen, I., Conboy, J.E., Cooke, O.C., Couchman, J., Couyoumtzelis, C., Coxe, R.L., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Davis, R., De Jong, S., De Roeck, A., Dervan, P., Desch, K., Dienes, B., Dixit, M.S., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Estabrooks, P.G., Etzion, E., Fabbri, F., Fanfani, A., Fanti, M., Faust, A.A., Feld, L., Fiedler, F., Fierro, M., Fleck, I., Frey, A., Furtjes, A., Futyan, D.I., Gagnon, P., Gary, J.W., Gascon, J., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Gibson, V., Gibson, W.R., Gingrich, D.M., Glenzinski, D., Goldberg, J., Gorn, W., Grandi, C., Graham, K., Gross, E., Grunhaus, J., Gruwe, M., Hajdu, C., Hanson, G.G., Hansroul, M., Hapke, M., Harder, K., Harel, A., Hargrove, C.K., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hildreth, M.D., Hill, J.C., Hobson, P.R., Hocker, James Andrew, Hoffman, Kara Dion, Homer, R.J., Honma, A.K., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Imrie, D.C., Ishii, K., Jacob, F.R., Jawahery, A., Jeremie, H., Jimack, M., Jones, C.R., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, P.I., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klier, A., Kobayashi, T., Kobel, M., Kokott, T.P., Kolrep, M., Komamiya, S., Kowalewski, Robert V., Kress, T., Krieger, P., von Krogh, J., Kuhl, T., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Lauber, J., Lawson, I., Layter, J.G., Lellouch, D., Letts, J., Levinson, L., Liebisch, R., List, B., Littlewood, C., Lloyd, A.W., Lloyd, S.L., Loebinger, F.K., Long, G.D., Losty, M.J., Lu, J., Ludwig, J., Lui, D., Macchiolo, A., Macpherson, A., Mader, W., Mannelli, M., Marcellini, S., Martin, A.J., Martin, J.P., Martinez, G., Mashimo, T., Mattig, Peter, McDonald, W.John, McKenna, J., Mckigney, E.A., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oakham, F.G., Odorici, F., Ogren, H.O., Okpara, A., Oreglia, M.J., Orito, S., Pasztor, G., Pater, J.R., Patrick, G.N., Patt, J., Perez-Ochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, J.E., Pinfold, J., Plane, David E., Poffenberger, P., Poli, B., Polok, J., Przybycien, M., Quadt, A., Rembser, C., Rick, H., Robertson, S., Robins, S.A., Rodning, N., Roney, J.M., Rosati, S., Roscoe, K., Rossi, A.M., Rozen, Y., Runge, K., Runolfsson, O., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sang, W.M., Sarkisian, E.K.G., Sbarra, C., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schmitt, S., Schoning, A., Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G.P., Sittler, A., Skuja, A., Smith, A.M., Snow, G.A., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Sproston, M., Stahl, A., Stephens, K., Steuerer, J., Stoll, K., Strom, David M., Strohmer, R., Surrow, B., Talbot, S.D., Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomas, J., Thomson, M.A., Torrence, E., Towers, S., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Van Kooten, Rick J., Vannerem, P., Verzocchi, M., Voss, H., Wackerle, F., Wagner, A., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wermes, N., Wetterling, D., White, J.S., Wilson, G.W., Wilson, J.A., Wyatt, T.R., Yamashita, S., Zacek, V., and Zer-Zion, D.
Subjects: Physics, Density matrix, Particle physics, Range (particle radiation), Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Hadron, 01 natural sciences, Omega, Helicity, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, Spin-½
Abstract: The helicity density matrix elements rho[00] of rho(770)+- and omega(782) mesons produced in Z decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity -1, 0 and +1 states. For the highest accessible scaled energy range 0.3 < x_E < 0.6, the measured rho[00] values of the rho(770)+- and the omega are 0.373 +- 0.052 and 0.142 +- 0.114, respectively. These results are compared to measurements of other vector mesons. The helicity density matrix elements rho[00] of rho(770)+- and omega(782) mesons produced in Z decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity -1, 0 and +1 states. For the highest accessible scaled energy range 0.3 < x_E < 0.6, the measured rho[00] values of the rho(770)+- and the omega are 0.373 +- 0.052 and 0.142 +- 0.114, respectively. These results are compared to measurements of other vector mesons. The helicity density matrix elements rho[00] of rho(770)+- and omega(782) mesons produced in Z decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity -1, 0 and +1 states. For the highest accessible scaled energy range 0.3 < x_E < 0.6, the measured rho[00] values of the rho(770)+- and the omega are 0.373 +- 0.052 and 0.142 +- 0.114, respectively. These results are compared to measurements of other vector mesons. The helicity density matrix elements rho[00] of rho(770)+- and omega(782) mesons produced in Z decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity -1, 0 and +1 states. For the highest accessible scaled energy range 0.3 < x_E < 0.6, the measured rho[00] values of the rho(770)+- and the omega are 0.373 +- 0.052 and 0.142 +- 0.114, respectively. These results are compared to measurements of other vector mesons. The helicity density matrix elements rho[00] of rho(770)+- and omega(782) mesons produced in Z decays have been measured using the OPAL detector at LEP. Over the measured meson energy range, the values are compatible with 1/3, corresponding to a statistical mix of helicity -1, 0 and +1 states. For the highest accessible scaled energy range 0.3 < x_E < 0.6, the measured rho[00] values of the rho(770)+- and the omega are 0.373 +- 0.052 and 0.142 +- 0.114, respectively. These results are compared to measurements of other vector mesons.
Published: 2000

13. Polarization and forward-backward asymmetry of $\Lambda$ baryons in hadronic Z $^0$ decays

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Barberio, E, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkins, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Barlow, RJ, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Bartoldus, R, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Batley, JR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Baumann, S, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Bechtluft, J, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lamarche, F, Beeston, C, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Behnke, T, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Bell, AN, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Bell, KW, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Bella, G, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Bentvelsen, S, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Bethke, S, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Biebel, O, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Biguzzi, A, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Bird, SD, Sachs, K, Saeki, T, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Blobel, V, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Bloodworth, IJ, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Bloomer, JE, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Bobinski, M, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, I, Bock, P, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, VanDenPlas, D, Verzocchi, M, Vikas, P, Vokurka, EH, Bonacorsi, D, Voss, H, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, Boutemeur, M, White, JS, Wilkems, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, W, Zer-Zion, D, Bouwens, BT, OPAL Collaboration, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Cuffani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, and Goodrick, MJ
Subjects: Particle physics, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, media_common.quotation_subject, Hadron, Lambda baryon, Lambda, 01 natural sciences, Asymmetry, High momentum, JET FRAGMENTATION, 0103 physical sciences, Nuclear Experiment, 010306 general physics, DETECTOR, Engineering (miscellaneous), media_common, Physics, E+E-PHYSICS, 010308 nuclear & particles physics, LEP, Polarization (waves), Hadronization, Transverse plane, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: The longitudinal polarization, the transverse polarization, and the forward-backward asymmetry of Lambda baryons have been measured using a sample of 4.34 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995. These results are important as an aid to the understanding of hadronization mechanisms. Significant longitudinal polarization has been observed at intermediate and high momentum. For x_E = 2 E_{Lambda}/\sqrt{s}) > 0.3, the longitudinal polarization has been measured to be -32.9 +/- 5.5(stat) +/- 5.2(syst)%. We have observed no transverse polarization. A significant forward-backward asymmetry has been measured and can be described by a JETSET model. The longitudinal polarization, the transverse polarization, and the forward-backward asymmetry of Lambda baryons have been measured using a sample of 4.34 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995. These results are important as an aid to the understanding of hadronization mechanisms. Significant longitudinal polarization has been observed at intermediate and high momentum. For x_E = 2 E_{Lambda}/\sqrt{s}) > 0.3, the longitudinal polarization has been measured to be -32.9 +/- 5.5(stat) +/- 5.2(syst)%. We have observed no transverse polarization. A significant forward-backward asymmetry has been measured and can be described by a JETSET model.
Published: 1998

14. Search for the standard model higgs boson at LEP

Author: Heister, J.A. Schael, S. Barate, R. Brunelière, R. De Bonis, I. Decamp, D. Goy, C. Jezequel, S. Lees, J.-R. Martin, F. Merle, E. Minard, M.-N. Pietrzyk, B. Trocmé, B. Boix, G. Bravo, S. Casado, M.P. Chmeissani, M. Crespo, J.M. Fernandez, E. Fernandez-Bosman, M. Garrido, Ll. Graugés, E. Lopez, J. Martinez, M. Merino, G. Miquel, R. Mir, Ll.M. Pacheco, A. Paneque, D. Ruiz, H. Colaleo, A. Creanza, D. De Filippis, N. De Palma, M. Iaselli, G. Maggi, G. Maggi, M. Nuzzo, S. Ranieri, A. Raso, G. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Tricomi, A. Zito, G. Huang, X. Lin, J. Quyang, Q. Wang, T. Xie, Y. Xu, R. Xue, S. Zhang, J. Zhang, L. Zhao, W. Abbaneo, D. Azzurri, P. Barklow, T. Buchmüller, O. Cattaneo, M. Cerutti, F. Clerbaux, B. Drevermann, H. Forty, R.W. Frank, M. Gianotti, F. Greening, T.C. Hansen, J.B. Harvey, J. Hutchcroft, D.E. Janot, P. Jost, B. Kado, M. Maley, P. Mato, P. Moutoussi, A. Ranjard, F. Rolandi, L. Schlatter, D. Sguazzoni, G. Tejessy, W. Teubert, F. Valassi, A. Videau, I. Ward, J.J. Badaud, F. Dessagne, S. Falvard, A. Fayolle, D. Gay, P. Jousset, J. Michel, B. Monteil, S. Pallin, D. Pascólo, J.M. Perret, P. Hansen, J.D. Hansen, J.R. Hansen, P.H. Nilsson, B.S. Wäänänen, A. Kyriakis, A. Markou, C. Simopoulou, E. Vayaki, A. Zachariadou, K. Blondel, A. Brient, J.-C. Machefert, F. Rouge, A. Swynghedauw, M. Tanaka, R. Videau, H. Ciulli, V. Focardi, E. Parrini, G. Antonelli, A. Antonelli, M. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Chiarella, V. Laurelli, P. Mannocchi, G. Murtas, F. Murtas, G.P. Passalacqua, L. Pepe-Altarelli, M. Spagnolo, P. Kennedy, J. Lynch, J.G. Negus, P. O'Shea, V. Smith, D. Thompson, A.S. Wasserbaech, S. Cavanaugh, R. Dhamotharan, S. Geweniger, C. Hanke, P. Hepp, V. Kluge, E.E. Leibenguth, G. Putzer, A. Stenzel, H. Tittel, K. Werner, S. Wunsch, M. Beuselinck, R. Binnie, D.M. Cameron, W. Davies, G. Dornan, P.J. Girone, M. Hill, R.D. Marinelli, N. Nowell, J. Przysiezniak, H. Rutherford, S.A. Sedgbeer, J.K. Thompson, J.C. White, R. Ghete, V.M. Girtler, P. Kneringer, E. Kuhn, D. Rudolph, G. Bouhova-Thacker, E. Bowdery, C.K. Clarke, D.P. Ellis, G. Finch, A.J. Foster, F. Hughes, G. Jones, R.W.L. Pearson, M.R. Robertson, N.A. Smizanska, M. Lemaitre, V. Blumenschein, U. Hölldorfer, F. Jakobs, K. Kay Ser, F. Kleinknecht, K. Müller, A.-S. Quast, G. Renk, B. Sander, H.-G. Schmeling, S. Wachsmuth, H. Zeitnitz, C. Ziegler, T. Bonissent, A. Carr, J. Coyle, P. Curtil, C. Ealet, A. Fouchez, D. Leroy, O. Kachelhoffer, T. Payre, P. Rousseau, D. Tilquin, A. Ragusa, F. David, A. Dietl, H. Ganis, G. Hüttmann, K. Lütjens, G. Mannert, C. Männer, W. Moser, H.-G. Settles, R. Wolf, G. Boucrot, J. Callot, O. Davier, M. Duflot, L. Grivaz, J.-F. Heusse, Ph. Jacholkowska, A. Loomis, C. Serin, L. Veillet, J.-J. De Vivie De Régie, J.-B. Yuan, C. Bagliesi, G. Boccali, T. Foà, L. Giammanco, A. Giassi, A. Ligabue, F. Messineo, A. Palla, F. Sanguinetti, G. Sciabà, A. Tenchini, R. Venturi, A. Verdini, P.G. Awunor, O. Blair, G.A. Coles, J. Cowan, G. Garcia-Bellido, A. Green, M.G. Jones, L.T. Medcalf, T. Misiejuk, A. Strong, J.A. Teixeira-Dias, P. Clifft, R.W. Edgecock, T.R. Norton, P.R. Tomalin, I.R. Bloch-Devaux, B. Boumediene, D. Colas, P. Fabbro, B. Lançon, E. Lemaire, M.-C. Locci, E. Perez, P. Rander, J. Renardy, J.-F. Rosowsky, A. Seager, P. Trabelsi, A. Tuchming, B. Vallage, B. Konstantinidis, N. Litke, A.M. Taylor, G. Booth, C.N. Cartwright, S. Combley, F. Hodgson, P.N. Lehto, M. Thompson, L.F. Affholderbach, K. Bohrer, A. Brandt, S. Grupen, C. Hess, J. Ngac, A. Prange, G. Sieler, U. Borean, C. Giannini, G. He, H. Putz, J. Rothberg, J. Armstrong, S.R. Berkelman, K. Cranmer, K. Ferguson, D.P.S. Gao, Y. González, S. Hayes, O.J. Hu, H. Jin, S. Kile, J. McNamara III, P.A. Nielsen, J. Pan, Y.B. Von Wimmersperg-Toeller, J.H. Wiedenmann, W. Wu, J. Wu, S.L. Wu, X. Zobernig, G. Dissertori, G. Crawley, B. Lamsa, J. Meyer, W.T. Rosenberg, E. Alderweireld, T. Bertrand, D. D'Hondt, J. de Clercq, C. Lemonne, J. Pukhaeva, N. van Lysebetten, A. van Remortel, N. Verbeure, F. Wickens, J. Alderweireld, T. Bertrand, D. D'Hondt, J. de Clercq, C. Lemonne, J. van Lysebetten, A. van Remortel, N. Verbeure, F. Wickens, J. Alderweireld, T. Bertrand, D. D'Hondt, J. de Clercq, C. Lemonne, J. van Lysebetten, A. van Remortel, N. Verbeure, F. Wickens, J. Fassouliotis, D. Kourkoumelis, C. Eigen, G. Stugu, B. Benvenuti, A. Cavallo, F. Navarria, F. Paiano, S. Perrotta, A. Rovelli, T. Valenti, G. Begalli, M. Mundim, L. Pol, M.E. Begalli, M. Mundim, L. Pol, M.E. Begalli, M. Mundim, L. Pol, M.E. Brunet, J.M. Tristram, G. Alemany-Fernandez, R. Augustinus, A. Baillon, P. Battaglia, M. Camporesi, T. Carena, F. Charpentier, Ph. Chierici, R. Chudoba, J. Chung, S.U. Collins, P. Drees, J. Elsing, M. Foeth, H. Gavillet, Ph. Gokieli, R. Herr, H. Holt, P.J. Joram, C. Kersevan, B.P. Kjaer, N.J. Marin, J.-C. Mariotti, C. Moenig, K. Pape, L. Parzefall, U. Piotto, E. Poireau, V. Rebecchi, P. Schwickerath, U. Spassov, T. Treille, D. van Eldik, J. van Vulpen, I. Wicke, D. Bloch, D. Nikolenko, M. Winter, M. Moenig, K. Adzic, P. Fanourakis, G. Fassouliotis, D. Kokkinias, P. Loukas, D. Markou, A. Mastroyiannopoulos, N. Nassiakou, M. Tzamarias, S. Zupan, M. Masik, J. Rames, J. Ridky, J. Todorovova, S. Travnicek, P. Vrba, V. Contri, R. Ferro, F. Monge, R. Morettini, P. Parodi, F. Petrolini, A. Arnoud, Y. Berat, C. Ledroit, F. Kiiskinen, A. Orava, R. Osterberg, K. Salmi, L. Bardin, D. Boyko, I. Kouznetsov, O. Krumstein, Z. Nikolenko, M. Olshevski, A. Pozdniakov, V. Pukhaeva, N. Sadovsky, A. Sisakian, A. Tkatchev, L. Tyapkin, I.A. Tyapkin, P. Zhuravlov, V. Zimin, N.I. Zintchenko, A. Albrecht, T. Allmendinger, T. Apel, W.-D. Barker, G. de Boer, W. Feindt, M. Haag, C. Hauler, F. Hennecke, M. Jungermann, L. Moch, M. Ramler, L. Rehn, J. Stanitzki, M. Weiser, C. Bruckman, P. Cieslik, K. Kucharczyk, M. Lesiak, T. Palka, H. Polok, G. Witek, M. Zalewska, A. Muryn, B. Oblakowska-Mucha, A. Szumlak, T. Bambade, P. Ben-Haim, E. Bouquet, B. Cosme, G. Fulda-Quenzer, F. Grosdidier, G. Lepeltier, V. Richard, F. Roudeau, P. Stocchi, A. Borisov, G. Sopczak, A. Abreu, P. Andringa, S. Anjos, N. Castro, N. Espirito Santo, M.C. Goncalves, P. Moreno, S. Onofre, A. Peralta, L. Pimenta, M. Tome, B. Veloso, F. Allport, P.P. Booth, P.S.L. Bowcock, T.J.V. Houlden, M.A. Jackson, J.N. King, B.T. Mc Nulty, R. Palacios, J.P. Taffard, A.C. Tobin, M. Washbrook, A.J. Parkes, C. Abdallah, J. Augustin, J.E. Baubillier, M. Berggren, M. da Silva, W. Kapusta, F. Savoy-Navarro, A. Ask, S. Hedberg, V. Jarlskog, G. Mjoernmark, U. Smirnova, O. Antilogus, P. Barbier, R. Jonsson, P. Katsanevas, S. Smadja, G. Verdier, P. Andreazza, A. Meroni, C. Troncon, C. Vegni, G. Amaldi, U. Bonesini, M. Calvi, M. Matteuzzi, C. Paganoni, M. Pullia, A. Tabarelli, T. Tonazzo, A. Leitner, R. Blom, M. Kluit, P. Montenegro, J. Mulders, M. Reid, D. Timmermans, J. van Dam, P. Benekos, N. Dris, M. Fokitis, E. Gazis, E. Katsoufis, E. Maltezos, S. Papadopoulou, T.D. Bugge, L. Hansen, J. Haug, S. Myklebust, T. Read, A. Cuevas, J. Lopez, J.M. Brodet, E. Hamilton, K. Jeans, D. Lyons, L. Myatt, G. Renton, P. Segar, A. Wilkinson, G. Anashkin, E. Checchia, P. de Min, A. Margoni, M. Mazzucato, F. Mazzucato, M. Ronchese, P. Crennell, D. Guy, J. Murray, W. Sekulin, R. Venus, W. Canale, V. di Ciaccio, L. Verzi, V. Baroncelli, A. di Simone, A. Graziani, E. Passeri, A. Pieri, L. Besancon, M. Besson, N. Boonekamp, M. Jarry, P. Lutz, P. Nicolaidou, R. Ouraou, A. Pierre, F. Ruhlmann-Kleider, V. Turluer, M.-L. Vilanova, D. Fernandez, J. Gomez-Ceballos, G. Marco, J. Marco, R. Martinez-Rivero, C. Matorras, F. Piedra, J. Rivero, M. Rodriguez, D. Chapkin, M. Chliapnikov, P. Obraztsov, V. Ryabtchikov, D. Sokolov, A. Uvarov, V. Yushchenko, O. Bracko, M. Golob, B. Kernel, G. Kersevan, B.P. Podobnik, T. Zavrtanik, D. Bracko, M. Golob, B. Kernel, G. Podobnik, T. Zavrtanik, D. Bracko, M. Golob, B. Kernel, G. Podobnik, T. Zavrtanik, D. Asman, B. Berntzon, L. Dalmau, J. Holmgren, S.-O. Hultqvist, K. Johansson, E.K. Johansson, P.D. Leinonen, L. Lipniacka, A. Moa, T. Amapane, N. de Maria, N. Migliore, E. Romero, A. Ballestrero, A. Cossutti, F. della Ricca, G. de Angelis, A. de Lotto, B. Poropat, P. Vitale, L. Cossutti, F. della Ricca, G. de Angelis, A. de Lotto, B. Amato, S. da Silva, T. de Paula, L. Gandelman, M. Lopes, J.H. Marechal, B. Moraes, D. Botner, O. Brenner, R. Ekelof, T. Ellert, M. Hallgren, A. Tegenfeldt, F. Costa, M.J. Ferrer, A. Fuster, J. Garcia, C. Oyanguren, A. Perepelitsa, V. Salt, J. Tortosa, P. Adam, W. Leder, G. Liko, D. MacNaughton, J. Mandl, F. Mitaroff, W. Strauss, J. Bluj, M. Doroba, K. Gokieli, R. Grzelak, K. Hoffman, J. Nawrocki, K. Sosnowski, R. Szczekowski, M. Szeptycka, M. Trochimczuk, M. Zalewski, P. Becks, K.-H. Behrmann, A. Buschmann, P. Drees, J. Flagmeyer, U. Hamacher, K. Liebig, W. Malek, A. Mueller, U. Muenich, K. Passon, O. Reinhardt, R. Siebel, M. Wahlen, H. Böhm, A. Baldew, S.V. Bobbink, G.J. Dierckxsens, M. Van Dierendonck, D. Azemoon, T. Berbeco, R. Banerjee, Sw. Blaising, J.J. Brochu, F. Coignet, G. Degré, A. Achard, P. Andreev, V.P. Chen, G. Chen, G.M. Chen, H.S. Adriani, O. Anselmo, F. Basile, M. Cara Romeo, G. Cindolo, F. Aziz, T. Banerjee, S. Alemanni, G. Aloisio, A. Boldizsar, L. Debreczeni, J. Becker, U. Berges, P. Burger, J.D. Cai, X.D. Capell, M. Clare, I. Dai, T.S. Anselmo, F. Baksay, G. Adriani, O. Becattini, F. Bellucci, L. Cartacci, A. Alcaraz, J. Allaby, J. Aziz, T. Barillère, R. Arefiev, A. Achard, P. Bourquin, M. Braccini, S. Chamizo, M. Déglon, P. Delmeire, E. Chen, H.F. Alemanni, G. Bartalini, P. Bay, A. Chemarin, M. Aguilar-Benitez, M. Alcaraz, J. Bajo, A. Berdugo, J. Casaus, J. Cerrada, M. Colino, N. De la Cruz, B. Baarmand, M. Baksay, L. Baarmand, M. Arefiev, A. Aloisio, A. Alviggi, M.G. Biglietti, M. Carlino, G. Chiefari, G. De Asmundis, R. Della Volpe, D. Bajo, A. Van Dalen, J.A. Baldew, S.V. Battiston, R. Bertucci, B. Biasini, M. Burger, W.J. Cecchi, C. Cucciarelli, S. Andreev, V.P. Blyth, S.C. Cavallo, N. Denes, P. Clare, R. Bagnaia, P. Borgia, B. Cavallari, F. Costantini, S. DeNotaristefani, F. Diemoz, M. Dionisi, C. Cifarelli, L. Branson, J.G. Banerjee, Sw. Barillère, R. Buijs, A. Batalova, N. Barczyk, A. Deiters, K. Batalova, N. Anderhub, H. Barczyk, A. Behner, F. Betev, B.L. Biland, A. Bourilkov, D. De Salvo, A. Becker, U. Chang, Y.H. Chen, A. Berdugo, J. Anagnostou, G. Bell, P.J. Bloodworth, I.J. Charlton, D.G. Hawkes, C.M. Homer, R.J. Jovanovic, P. Krieger, P. Macpherson, A. McMahon, T.J. O'Neale, S.W. Turner-Watson, M.F. Watkins, P.M. Watson, A.T. Watson, N.K. Wilson, J.A. Abbiendi, G. Arcelli, S. Bonacorsi, D. Brigliadori, L. Cuffiani, M. Dallavalle, G.M. Fabbri, F. Giacomelli, G. Giacomelli, P. Marcellini, S. Masetti, G. Michelini, A. Poli, B. Siroli, G. Tricoli, A. Åkesson, P.F. Geich-Gimbel, C. Günther, P.O. Kobel, M. Mader, W. Quadt, A. Rosati, S. Schumacher, M. Stahl, A. Wermes, N. Benelli, G. Campana, S. Gary, J.W. Giunta, M. Hanson, G.G. Harin-Dirac, M. Kress, T. Layter, J.G. Pásztor, G. Rick, H. Shen, B.C. Tran, P. Zer-Zion, D. Ainsley, C. Batley, R.J. Carter, J.R. Ford, M. Hill, J.C. Shepherd-Themistocleous, C.H. Thomson, M.A. Ward, C.P. Ward, D.R. Bellerive, A. Carnegie, R.K. Donkers, M. Hemingway, R.J. Junk, T.R. Karlen, D. Krieger, P. Mes, H. Sachs, K. Waller, D. Barberio, E. Braibant, S. Burckhart, H.J. Csilling, A. De Roeck, A. De Wolf, E.A. Ferrari, P. Frey, A. Fürtjes, A. Gruwe, M. Hauschild, M. Hawkings, R. Kruger, K. Meijers, F. Nisius, R. Oh, A. Pásztor, G. Plane, D.E. Polok, J. Przybycień, M. Rabbertz, K. Rembser, C. Sarkisyan, E.K.G. Scharff-Hansen, P. Schorner-Sadenius, T. Schroder, M. Schwick, C. Shears, T.G. Smith, A.M. Tasevsky, M. Trigger, I. Voss, H. Vossebeld, J. Wells, P.S. Wengler, T. Amaral, P. Anderson, K.J. Gupta, A. Hoffman, K. Merritt, F.S. Oreglia, M.J. Pilcher, J.E. Spano, F. Teuscher, R. Boeriu, O. Feld, L. Fleck, I. 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Toya, D. Ueda, I. Yamashita, S. Asai, S. Ishii, K. Kanzaki, J. Kawagoe, K. Kawamoto, T. Kobayashi, T. Komamiya, S. Mashimo, T. Mihara, S. Mori, T. Nakamura, I. Orito, S. Saeki, T. Toya, D. Ueda, I. Yamashita, S. Duchovni, E. Gross, E. Klier, A. Kupper, M. Lellouch, D. Levinson, L. Mikenberg, G. Renkel, P. Wolf, G. Zivkovic, L. Bechtle, P. Behnke, T. Buesser, K. Desch, K. Gaycken, G. Hamann, M. Harder, K. Hauschildt, J. Hensel, C. Heuer, R.D. Huntemeyer, P. Krümer, T. Menges, W. Bailey, I. Kanaya, N. Keeler, R.K. Kormos, L. Kowalewski, R.V. McPherson, R.A. Roney, J.M. Sobie, R. Vachon, B. Axen, D. Howard, R. Lu, J. McKenna, J. Caron, B. Macpherson, A. McDonald, W.J. Pinfold, J. Hajdu, C. Horváth, D. Dienes, B. Trńcsńnyi, Z. Ujvári, B. Biebel, O. Boutemeur, M. Dubbert, J. Duckeck, G. Fiedler, F. Leins, A. Mendez-Lorenzo, P. Sahr, O. Schaile, A.D. Schaile, O. Strohmer, R. Trefzger, T. Vollmer, C.F. Bethke, S. Kluth, S. Pahl, C. Schieck, J. Neal, H.A. Azuelos, G. Mes, H. Charlton, D.G. Horváth, D. Trńcsńnyi, Z. Ujvári, B. Seuster, R. Csilling, A. Shears, T.G. Vossebeld, J. Oh, A. Sarkisyan, E.K.G. Mutter, A. Polok, J. Mattig, P. Przybycień, M. ALEPH DELPHI L3 OPAL The LEP Working Group for Higgs Boson Searches
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected a total of 2461 pb−1 of e+ e− collision data at centre-of-mass energies between189 and 209 GeV. The data are used to search for the Standard Model Higgs boson. The search results of the four collaborations are combined and examined in a likelihood test for their consistency with two hypotheses: the background hypothesis and the signal plus background hypothesis. The corresponding confidences have been computed as functions of the hypothetical Higgs boson mass. A lower bound of114.4 GeV/c2 is established, at the 95% confidence level, on the mass of the Standard Model Higgs boson. The LEP data are also used to set upper bounds on the HZZ coupling for various assumptions concerning the decay of the Higgs boson. © 2016, Elsevier. All rights reserved.
Published: 2003

15. Search for the standard model Higgs boson at LEP

Author: Abbaneo, D, Abbiendi, G, Barate, R, Heister, A, Schael, S, Bruneliere, R, De Bonis, I, Decamp, D, Goy, C, Jezequel, S, Lees, JP, Martin, F, Merle, E, Minard, MN, Pietrzyk, B, Trocme, B, Boix, G, Bravo, S, Casado, MP, Chmeissani, M, Crespo, JM, Fern, ez, E, ez-Bosman, M, Garrido, L, Grauges, E, Lopez, J, Martinez, M, Merino, G, Miquel, R, Mir, LM, Pacheco, A, Paneque, D, Ruiz, H, Colaleo, A, Creanza, D, De Filippis, N, de Palma, M, Iaselli, G, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Quyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Azzurri, P, Barklow, T, Buchmuller, O, Cattaneo, A, Cerutti, F, Clerbaux, B, Drevermann, H, Forty, RW, Frank, M, Gianotti, F, Greening, TC, Hansen, JB, Harvey, J, Hutchcroft, DE, Janot, P, Jost, B, Kado, M, Maley, P, Mato, P, Moutoussi, A, Ranjard, F, Rol, i, L, Schlatter, D, Sguazzoni, G, Tejessy, W, Valassi, A, Videau, I, Ward, JJ, Badaud, F, Dessagne, S, Falvard, A, Fayolle, D, Gay, P, Jousset, J, Michel, B, Monteil, S, Pallin, D, Pascolo, JM, Perret, P, Hansen, JD, Hansen, JR, Hansen, PH, Nilsson, BS, Waananen, A, Kyriakis, A, Markou, C, Simopoulou, E, Vayaki, A, Zachariadou, K, Blondel, A, Brient, JC, Machefert, F, Rouge, A, Swynghedauw, M, Tanaka, R, Videau, H, Ciulli, V, Focardi, E, Parrini, G, Antonelli, A, Antonelli, M, Bencivenni, G, Bologna, G, Bossi, F, Campana, R, Capon, G, Chiarella, V, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Passalacqua, L, Pepe-Altarelli, M, Spagnolo, P, Kennedy, J, Lynch, JG, Negus, P, O'Shea, V, Smith, D, Thompson, AS, Wasserbacch, S, Cavanaugh, R, Dhamotharan, S, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Leibenguth, G, Putzer, A, Stenzel, H, Tittel, K, Werner, S, Wunsch, M, Beuselinck, R, Binnie, DM, Cameron, W, Davies, G, Dornan, PJ, Girone, M, Hill, RD, Marinelli, N, Nowell, J, Przysiezniak, H, Rutherford, SA, Sedgbeer, JK, Thompson, JC, White, R, Ghete, 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G, Palomares, C, Pandoulas, D, Paolucci, P, Paramatti, R, Passaleva, G, Patricelli, S, Paul, T, Pauluzzi, M, Paus, C, Pauss, F, Pedace, M, Pensotti, S, Perret Gallix, D, Petersen, B, Piccolo, D, Pierella, F, Piroue, Pa, Pistolesi, E, Plyaskin, V, Pohl, M, Pojidaev, V, Postema, H, Pothier, J, Prokofiev, Do, Prokofiev, D, Quartieri, J, Rahal Callot, G, Rahaman, Ma, Raics, P, Raja, N, Ramelli, R, Rancoita, Pg, Ranieri, R, Raspereza, A, Razis, P, Ren, D, Rescigno, M, Reucroft, S, Riemann, S, Riles, K, Roe, Bp, Romero, L, Rosca, A, Rosier Lees, S, Roth, S, Rosenbleck, C, Roux, B, Rubio, Ja, Ruggiero, G, Rykaczewski, H, Sakharov, A, Saremi, S, Sarkar, S, Salicio, J, Sanchez, E, Sanders, Mp, Schafer, C, Schegelsky, V, Schmidt Kaerst, S, Schmitz, D, Schopper, H, Schotanus, Dj, Schwering, G, Sciacca, C, Servoli, L, Shevchenko, S, Shivarov, N, Shoutko, V, Shumilov, E, Shvorob, A, Siedenburg, T, Son, D, Spillantini, P, Steuer, M, Stickland, Dp, Stoyanov, B, Straessner, A, Sudhakar, K, Sultanov, G, Sun, Lz, Sushkov, S, Suter, H, Swain, Jd, Szillasi, Z, Tang, Xw, Tarjan, P, Tauscher, L, Taylor, L, Tellili, B, Teyssier, D, Timmermans, C, Ting, Sm, Tonwar, Sc, Toth, J, Tully, C, Tung, Kl, Uchida, Y, Ulbricht, J, Valente, E, van de Walle, Rt, Veszpremi, V, Vesztergombi, G, Vetlitsky, I, Vicinanza, D, Viertel, G, Villa, S, Vivargent, M, Vlachos, S, Vodopianov, I, Vogel, H, Vogt, H, Vorobiev, I, Vorobyov, Aa, Wadhwa, M, Wallraff, W, Wang, M, Wang, Xl, Weber, M, Wienemann, P, Wilkens, H, Wu, Sx, Wynhoff, S, Xia, L, Xu, Zz, Yamamoto, J, Yang, Bz, Yang, Cg, Yang, Hj, Yang, M, Yeh, Sc, Zalite, A, Zalite, Y, Zhang, Zp, Zhao, J, Zhu, Gy, Zhu, Ry, Zhuang, Hl, Zichichi, A, Zilizi, G, Zimmermann, B, Zoller, M, Ainsley, C, Akesson, Pf, Alexander, G, Allison, J, Amaral, P, Anagnostou, G, Anderson, Kj, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Bailey, I, Barberio, E, Barlow, Rj, Batley, Rj, Bechtle, P, Behnke, T, Bell, Kw, Bell, Pj, Bella, G, Bellerive, A, Benelli, G, Bethke, S, Biebell, O, Bloodworth, Ij, Boeriun, O, Bock, P, Bonacorsi, D, Boutemeur, M, Braibant, S, Brigliadori, L, Brown, Rm, Buesser, K, Burckhart, Hj, Campana, S, Carnegie, Rk, Caron, B, Carter, Aa, Carter, Jr, Chang, Cy, Charlton, Dg, Csilling, A, Cuffiani, M, Dado, S, Dallavalle, Gm, Dallison, S, De Roeck, A, De Wolf, Ea, Desch, K, Dienes, B, Donkers, M, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, Ip, Elfgren, E, Etzion, E, Fabbri, F, Feld, L, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Furtjes, A, Gagnon, P, Gary, Jw, Gaycken, G, Geich Gimbel, C, Giacomelli, G, Giacomelli, P, Giunta, M, Goldberg, J, Gross, E, Grunhaus, J, Gruwe, M, Gunther, Po, Gupta, A, Hajdu, C, Hamann, M, Hanson, Gg, Harder, K, Harel, A, Harin Dirac, M, Hauschild, M, Hauschildt, J, Hawkes, Cm, Hawkings, R, Hemingway, Rj, Hensel, C, Herten, G, Heuer, Rd, Hill, Jc, Hoffman, K, Homer, Rj, Horvath, D, Howard, R, Huntemeyer, P, Igo Kemenes, P, Ishii, K, Jeremie, H, Jovanovic, P, Junk, Tr, Kanaya, N, Kanzaki, J, Karapetian, G, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Keeler, Rk, Kellogg, Rg, Kennedy, Bw, Kim, Dh, Klein, K, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Komamiya, S, Kormos, L, Kowalewski, Rv, Kramer, T, Kress, T, Krieger, P, von Krogh, J, Krop, D, Kruger, K, Kupper, M, Lafferty, Gd, Landsman, H, Lanske, D, Layter, Jg, Leins, A, Lellouch, D, Letts, J, Levinson, L, Lillich, J, Lloyd, Sl, Loebinger, Fk, Lu, J, Ludwig, J, Macpherson, A, Mader, W, Marcellini, S, Marchant, Te, Martin, Aj, Masetti, G, Mashimo, T, Mattig, P, Mcdonald, Wj, Mckenna, J, Mcmahon, Tj, Mcpherson, Ra, Meijers, F, Mendez Lorenzo, P, Menges, W, Merritt, F, Mes, H, Michelini, A, Mihara, S, Mikenberg, G, Miller, Dj, Moed, S, Mohr, W, Mori, T, Mutter, A, Nagai, K, Nakamura, I, Neal, Ha, Nisius, R, O'Neale, Sw, Oh, A, Okpara, A, Oreglia, Mj, Orito, S, Pahl, C, Pasztor, G, Pater, Jr, Patrick, Gn, Pilcher, Je, Pinfold, J, Plane, De, Poli, B, Polok, J, Pooth, O, Przybycien, M, Quadt, A, Rabbertz, K, Rembser, C, Renkel, K, Rick, H, Roney, Jm, Rosati, S, Rozen, Y, Runge, K, Sachs, K, Saeki, T, Sahr, O, Sarkisyan, Ekg, Schaile, Ad, Schaile, O, Scharff Hansen, P, Schieck, J, Schorner Sadenius, T, Schroder, M, Schumacher, M, Schwick, C, Scott, Wg, Seuster, R, Shears, Tg, Shen, Bc, Shepherd Themistocleous, Ch, Sherwood, P, Siroli, G, Skuja, A, Smith, Am, Sobie, R, Soldner Rembold, S, Spagnolo, S, Spano, F, Stah, A, Stephens, K, Strom, D, Strohmer, R, Tarem, S, Tasevsky, M, Taylor, Rj, Teuscher, R, Thomson, Ma, Torrence, E, Toya, D, Tran, P, Trefzger, T, Tricoli, A, Trigger, I, Trocsanyi, Z, Tsur, E, Turner Watson, Mf, Ueda, I, Ujvari, B, Vachon, B, Vollmer, Cf, Vannerem, P, Verzocchi, M, Voss, H, Vossebeld, J, Waller, D, Ward, Cp, Ward, Dr, Watkins, Pm, Watson, At, Watson, Nk, Well, P, Wengler, T, Wermes, N, Wetterling, D, Wilson, Gw, Wilson, Ja, Wyatt, Tr, Yamashita, S, Zer Zion, D, Zivkovic, L., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), ALEPH, DELPHI, L3, OPAL, Lees, J, Minard, M, Casado, M, Crespo, J, Fern, Ez, E, ez-Bosman, M, Mir, L, Forty, R, Greening, T, Hutchcroft, D, Rol, I, L, Ward, J, Pascolo, J, Hansen, P, Brient, J, Murtas, G, Pepe-Altarelli, M, Lynch, J, Kluge, E, Binnie, D, Dornan, P, Hill, R, Rutherford, S, Sedgbeer, J, Thompson, J, Ghete, V, Bouhova-Thacker, E, Bowdery, C, Clarke, D, Finch, A, Jones, R, Pearson, M, Robertson, N, S, Er, H, Moser, H, Grivaz, J, Veillet, J, De Vivie de Regie, J, Ligabue, F, Verdini, P, Blair, G, Garcia-Bellido, A, Green, M, Jones, L, Strong, J, Teixeira-Dias, P, Clifft, R, Edgecock, T, Norton, P, Tomalin, I, Bloch-Devaux, B, Lemaire, M, R, Er, J, Renardy, J, Litke, A, Booth, C, Hodgson, P, Thompson, L, Br, T, S, Armstrong, S, Ferguson, D, Hayes, O, Mcnamara, P, Pan, Y, von Wimmersperg-Toeller, J, Wu, S, Alemany-Fern, Ez, R, Allport, P, Apel, W, Augustin, J, Becks, K, Ben-Haim, E, Bertr, Booth, P, Bowcock, T, Brunet, J, Chung, S, Costa, M, Santo, M, Ez, J, Fulda-Quenzer, F, G, Elman, M, Gomez-Ceballos, G, Holmgren, S, Holt, P, Houlden, M, Jackson, J, Johansson, E, Johansson, P, Kersevan, B, King, B, Kjaer, N, Lopes, J, M, L, F, Marin, J, Martinez-Rivero, C, Meyer, W, Oblakowska-Mucha, A, Palacios, J, Papadopoulou, T, Pol, M, Ruhlmann-Kleider, V, Savoy-Navarro, A, Taffard, A, Turluer, M, Tyapkin, I, Washbrook, A, Zimin, N, Aguilar-Benitez, M, Alviggi, M, Andreev, V, Baarm, Baldew, S, Betev, B, Bil, Blaising, J, Blyth, S, Bobbink, G, Branson, J, Burger, J, Burger, W, Cai, X, Romeo, G, Chang, Y, Gong, Z, Ting, S, Wang, Z, van Dalen, J, Dova, M, Eppling, F, Falagan, M, Fi, Rini, E, Field, J, Fisher, P, Ganguli, S, Garcia-Abia, P, Gruenewald, M, Gupta, V, Gutay, L, Hou, S, Jin, B, Josa-Mutuberria, I, Kienzle-Focacci, M, Kim, J, Konig, A, Kraemer, R, de Guevara, P, L, I, G, Lee, H, Le Goff, J, Lin, C, Lin, W, Linde, F, Liu, Z, Ma, W, Martin, J, Mcneil, R, Metzger, W, Mohanty, G, Muijs, A, Nessi-Tedaldi, F, P, Oulas, D, Perret-Gallix, D, Piroue, P, Rahal-Callot, G, Rahaman, M, Rancoita, P, Roe, B, Rosier-Lees, S, Rubio, J, Ers, M, Schmidt-Kaerst, S, Schotanus, D, Stickl, Dp, Sun, L, Swain, J, Tang, X, Tonwar, S, Tung, K, van de Walle, R, Vorobyov, A, Wang, X, Xu, Z, Yang, B, Yang, C, Yang, H, Yeh, S, Zhang, Z, Zhu, G, Zhu, R, Zhuang, H, Akesson, P, Alex, Er, G, Anderson, K, Barlow, R, Batley, R, Bell, K, Bell, P, Bloodworth, I, Brown, R, Burckhart, H, Carnegie, R, Carter, A, Carter, J, Chang, C, Charlton, D, Dallavalle, G, De Wolf, E, Duerdoth, I, Gary, J, Geich-Gimbel, C, Gunther, P, Hanson, G, Harin-Dirac, M, Hawkes, C, Hemingway, R, Heuer, R, Hill, J, Homer, R, Igo-Kemenes, P, Junk, T, Keeler, R, Kellogg, R, Kennedy, B, Kim, D, Kowalewski, R, Lafferty, G, Sman, H, Layter, J, Lloyd, S, Loebinger, F, Marchant, T, Martin, A, Mcdonald, W, Mcmahon, T, Mcpherson, R, Mendez-Lorenzo, P, Miller, D, Neal, H, O'Neale, S, Oreglia, M, Pater, J, Patrick, G, Pilcher, J, Plane, D, Roney, J, Sarkisyan, E, Schaile, A, Scharff-Hansen, P, Schorner-Sadenius, T, Scott, W, Shears, T, Shen, B, Shepherd-Themistocleous, C, Smith, A, Soldner-Rembold, S, Taylor, R, Thomson, M, Turner-Watson, M, Vollmer, C, Ward, C, Ward, D, Watkins, P, Watson, A, Watson, N, Wilson, G, Wilson, J, Wyatt, T, Zer-Zion, D, Zivkovic, L, Aleph, C, Delphi, C, L3, C, Opal, C, LEP Working Grp Higgs Boson, S, OPAL Collaboration, LEP WORKING GROUP FOR HIGGS BOSON SEARCHES AND LEP, Collaboration, Spagnolo, Stefania Antonia, DELLA RICCA, Giuseppe, Giannini, Gianrossano, Flores, Sylvie, S., Schael, Aloisio, Alberto, Alviggi, Mariagrazia, Canale, Vincenzo, Chiefari, Giovanni, DELLA VOLPE, Domenico, Merola, Leonardo, Napolitano, Marco, S., Patricelli, Sciacca, Crisostomo, Lista, Luca, Achard, Pablo, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Echenard, Bertrand, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Malgeri, Luca, Natale, Sonia, Pohl, Martin, Straessner, Arno, Delphi (IHEF, IoP, FNWI), and L3 (IHEF, IoP, FNWI)
Subjects: Aleph, Particle physics, Nuclear and High Energy Physics, PARTICLE PHYSICS, LARGE ELECTRON POSITRON COLLIDER, ALEPH, DELPHI, L3, OPAL, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], elementary particles, FOS: Physical sciences, ddc:500.2, Astrophysics::Cosmology and Extragalactic Astrophysics, MASS, 01 natural sciences, Upper and lower bounds, Next-to-Minimal Supersymmetric Standard Model, Standard Model, High Energy Physics - Experiment, E(+)E(-) COLLISIONS, High Energy Physics - Experiment (hep-ex), BROKEN SYMMETRIES, Z(0) DECAYS, ROOT-S, PARTICLES, Consistency (statistics), 0103 physical sciences, Generation, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics, 010306 general physics, Physics, Research Groups and Centres\Physics\Low Temperature Physics, electron positron, 010308 nuclear & particles physics, Faculty of Science\Physics, High Energy Physics::Phenomenology, Settore FIS/01 - Fisica Sperimentale, Search for the Higgs boson, Higgs boson, Physique des particules élémentaires, High Energy Physics::Experiment, Particle Physics - Experiment, Higgs
Abstract: The four LEP Collaborations, ALEPH, DELPHI, L3 and OPAL, have collected a total of 2461 pb−1 of e+e− collision data at centre-of-mass energies between 189 and 209 GeV. The data are used to search for the Standard Model Higgs boson. The search results of the four Collaborations are combined and examined in a likelihood test for their consistency with two hypotheses: the background hypothesis and the signal plus background hypothesis. The corresponding confidences have been computed as functions of the hypothetical Higgs boson mass. A lower bound of 114.4 GeV/c2 is established, at the 95% confidence level, on the mass of the Standard Model Higgs boson. The LEP data are also used to set upper bounds on the HZZ coupling for various assumptions concerning the decay of the Higgs boson., Physics Letters B, 565, ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445
Published: 2003

16. The MEG detector for ${\mu}+\to e+{\gamma}$ decay search

Author: Adam, J., Bai, X., Baldini, A. M., Baracchini, E., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Cerri, C., Corbo, M., Curalli, N., De Bari, A., De Gerone, M., Del Frate, L., Doke, S., Dussoni, S., Egger, J., Fratini, K., Fujii, Y., Galli, L., Galeotti, S., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hisamatsu, M. Hildebrandt Y., Ignatov, F., Iwamoto, T., Kaneko, D., Kasami, K., Kettle, P. -R., Khazin, B. I., Korenchenko, O. Kiselev A., Kravchuk, N., Lim, G., Maki, A., Mihara, S., Molzon, W., Mori, T., Morsani, F., Mzavia, D., Nardò, R., Natori, H., Nicolò, D., Nishiguchi, H., Ootani, Y. Nishimura W., Ozone, K., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Raffaelli, F., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Sawada, R., Schneebeli, M., Sergiampietri, F., Signorelli, G., Suzuki, S., Tenchini, F., Topchyan, C., Uchiyama, Y., Voena, R. Valle C., Xiao, F., Yamada, S., Yamamoto, S., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Physics::Accelerator Physics, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $\mu^+$ beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and the positron momentum, a timing counter for measuring the positron time, and a liquid xenon detector for measuring the photon energy, position and time. The trigger system, the read-out electronics and the data acquisition system are also presented in detail. The paper is completed with a description of the equipment and techniques developed for the calibration in time and energy and the simulation of the whole apparatus., Comment: 59 pages, 90 figures
Published: 2013

17. The MEG detector for $��+\to e+��$ decay search

Author: Adam, J., Bai, X., Baldini, A. M., Baracchini, E., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Cerri, C., Corbo, M., Curalli, N., De Bari, A., De Gerone, M., Del Frate, L., Doke, S., Dussoni, S., Egger, J., Fratini, K., Fujii, Y., Galli, L., Galeotti, S., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Graziosi, A., Grigoriev, D. N., Haruyama, T., Hisamatsu, M. Hildebrandt Y., Ignatov, F., Iwamoto, T., Kaneko, D., Kasami, K., Kettle, P. -R., Khazin, B. I., Korenchenko, O. Kiselev A., Kravchuk, N., Lim, G., Maki, A., Mihara, S., Molzon, W., Mori, T., Morsani, F., Mzavia, D., Nard��, R., Natori, H., Nicol��, D., Nishiguchi, H., Ootani, Y. Nishimura W., Ozone, K., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Raffaelli, F., Renga, F., Ripiccini, E., Ritt, S., Rossella, M., Sawada, R., Schneebeli, M., Sergiampietri, F., Signorelli, G., Suzuki, S., Tenchini, F., Topchyan, C., Uchiyama, Y., Voena, R. Valle C., Xiao, F., Yamada, S., Yamamoto, S., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: High Energy Physics - Experiment (hep-ex), Physics::Instrumentation and Detectors, Physics::Accelerator Physics, FOS: Physical sciences, High Energy Physics::Experiment, Instrumentation and Detectors (physics.ins-det)
Abstract: The MEG (Mu to Electron Gamma) experiment has been running at the Paul Scherrer Institut (PSI), Switzerland since 2008 to search for the decay \meg\ by using one of the most intense continuous $��^+$ beams in the world. This paper presents the MEG components: the positron spectrometer, including a thin target, a superconducting magnet, a set of drift chambers for measuring the muon decay vertex and the positron momentum, a timing counter for measuring the positron time, and a liquid xenon detector for measuring the photon energy, position and time. The trigger system, the read-out electronics and the data acquisition system are also presented in detail. The paper is completed with a description of the equipment and techniques developed for the calibration in time and energy and the simulation of the whole apparatus., 59 pages, 90 figures
Published: 2013
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18. Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP

Author: Schael, S. Barate, R. Brunelière, R. Buskulic, D. De Bonis, I. Decamp, D. Ghez, P. Goy, C. Jézéquel, S. Lees, J.-P. Lucotte, A. Martin, F. Merle, E. Minard, M.-N. Nief, J.-Y. Odier, P. Pietrzyk, B. Trocmé, B. Bravo, S. Casado, M.P. Chmeissani, M. Comas, P. Crespo, J.M. Fernandez, E. Fernandez-Bosman, M. Garrido, L. Grauges, E. Juste, A. Martinez, M. Merino, G. Miquel, R. Mir, L.M. Orteu, S. Pacheco, A. Park, I.C. Perlas, J. Riu, I. Ruiz, H. Sanchez, F. Colaleo, A. Creanza, D. De Filippis, N. de Palma, M. Iaselli, G. Maggi, G. Maggi, M. Nuzzo, S. Ranieri, A. Raso, G. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Tricomi, A. Zito, G. Huang, X. Lin, J. Ouyang, Q. Wang, T. Xie, Y. Xu, R. Xue, S. Zhang, J. Zhang, L. Zhao, W. Abbaneo, D. Bazarko, A. Becker, U. Boix, G. Bird, F. Blucher, E. Bonvicini, B. Bright-Thomas, P. Barklow, T. Buchmüller, O. Cattaneo, M. Cerutti, F. Ciulli, V. Clerbaux, B. Drevermann, H. Forty, R.W. Frank, M. Greening, T.C. Hagelberg, R. Halley, A.W. Gianotti, F. Girone, M. Hansen, J.B. Harvey, J. Jacobsen, R. Hutchcroft, D.E. Janot, P. Jost, B. Knobloch, J. Kado, M. Lehraus, I. Lazeyras, P. Maley, P. Mato, P. May, J. Moutoussi, A. Pepe-Altarelli, M. Ranjard, F. Rolandi, L. Schlatter, D. Schmitt, B. Schneider, O. Tejessy, W. Teubert, F. Tomalin, I.R. Tournefier, E. Veenhof, R. Valassi, A. Wiedenmann, W. Wright, A.E. Ajaltouni, Z. Badaud, F. Chazelle, G. Deschamps, O. Dessagne, S. Falvard, A. Ferdi, C. Fayolle, D. Gay, P. Guicheney, C. Henrard, P. Jousset, J. Michel, B. Monteil, S. Montret, J.C. Pallin, D. Pascolo, J.M. Perret, P. Podlyski, F. Bertelsen, H. Fernley, T. Hansen, J.D. Hansen, J.R. Hansen, P.H. Kraan, A.C. Lindahl, A. Mollerud, R. Nilsson, B.S. Rensch, B. Waananen, A. Daskalakis, G. Kyriakis, A. Markou, C. Simopoulou, E. Siotis, I. Vayaki, A. Zachariadou, K. Blondel, A. Bonneaud, G. Brient, J.-C. Machefert, F. Rougé, A. Rumpf, M. Swynghedauw, M. Tanaka, R. Verderi, M. Videau, H. Focardi, E. Parrini, G. Corden, M. Georgiopoulos, C. Antonelli, A. Antonelli, M. Bencivenni, G. Bologna, G. Bossi, F. Campana, P. Capon, G. Chiarella, V. Felici, G. Laurelli, P. Mannocchi, G. Murtas, G.P. Passalacqua, L. Picchi, P. Colrain, P. ten Have, I. Hughes, I.S. Kennedy, J. Knowles, I.G. Lynch, J.G. Morton, W.T. Negus, P. O'Shea, V. Raine, C. Reeves, P. Scarr, J.M. Smith, K. Thompson, A.S. Turnbull, R.M. Wasserbaech, S. Cavanaugh, R. Dhamotharan, S. Geweniger, C. Hanke, P. Hansper, G. Hepp, V. Kluge, E.E. Putzer, A. Sommer, J. Stenzel, H. Tittel, K. Werner, W. Wunsch, M. Beuselinck, R. Binnie, D.M. Cameron, W. Davies, G. Dornan, P.J. Goodsir, S. Marinelli, N. Martin, E.B. Nash, J. Nowell, J. Rutherford, S.A. Sedgbeer, J.K. Thompson, J.C. White, R. Williams, M.D. Ghete, V.M. Girtler, P. Kneringer, E. Kuhn, D. Rudolph, G. Bouhova-Thacker, E. Bowdery, C.K. Buck, P.G. Clarke, D.P. Ellis, G. Finch, A.J. Foster, F. Hughes, G. Jones, R.W.L. Keemer, N.R. Pearson, M.R. Robertson, N.A. Sloan, T. Smizanska, M. Snow, S.W. Williams, M.I. van der Aa, O. Delaere, C. Leibenguth, G. Lemaitre, V. Bauerdick, L.A.T. Blumenschein, U. van Gemmeren, P. Giehl, I. Hölldorfer, F. Jakobs, K. Kasemann, M. Kayser, F. Kleinknecht, K. Müller, A.-S. Quast, G. Renk, B. Rohne, E. Sander, H.-G. Schmeling, S. Wachsmuth, H. Wanke, R. Zeitnitz, C. Ziegler, T. Aubert, J.J. Benchouk, C. Bonissent, A. Carr, J. Coyle, P. Curtil, C. Ealet, A. Etienne, F. Fouchez, D. Motsch, F. Payre, P. Rousseau, D. Tilquin, A. Talby, M. Thulasidas, M. Aleppo, M. Ragusa, F. Büscher, V. David, A. Dietl, H. Ganis, G. Hüttmann, K. Lütjens, G. Mannert, C. Männer, W. Moser, H.-G. Settles, R. Seywerd, H. Villegas, M. Wolf, G. Azzurri, P. Boucrot, J. Callot, O. Chen, S. Cordier, A. Davier, M. Duflot, L. Grivaz, J.-F. Heusse, P. Jacholkowska, A. Le Diberder, F. Lefrançois, J. Mutz, A.M. Schune, M.H. Serin, L. Veillet, J.-J. Videau, I. Zerwas, D. Bagliesi, G. Bettarini, S. Boccali, T. Bozzi, C. Calderini, G. Dell'Orso, R. Fantechi, R. Ferrante, I. Fidecaro, F. Foà, L. Giammanco, A. Giassi, A. Gregorio, A. Ligabue, F. Lusiani, A. Marrocchesi, P.S. Messineo, A. Palla, F. Rizzo, G. Sanguinetti, G. Sciabà, A. Sguazzoni, G. Spagnolo, P. Steinberger, J. Tenchini, R. Vannini, C. Venturi, A. Verdini, P.G. Awunor, O. Blair, G.A. Cowan, G. Garcia-Bellido, A. Green, M.G. Medcalf, T. Misiejuk, A. Strong, J.A. Teixeira-Dias, P. Botterill, D.R. Clifft, R.W. Edgecock, T.R. Edwards, M. Haywood, S.J. Norton, P.R. Ward, J.J. Bloch-Devaux, B. Boumediene, D. Colas, P. Emery, S. Fabbro, B. Kozanecki, W. Lançon, E. Lemaire, M.-C. Locci, E. Perez, P. Rander, J. Renardy, J.F. Roussarie, A. Schuller, J.P. Schwindling, J. Tuchming, B. Vallage, B. Black, S.N. Dann, J.H. Kim, H.Y. Konstantinidis, N. Litke, A.M. McNeil, M.A. Taylor, G. Booth, C.N. Cartwright, S. Combley, F. Hodgson, P.N. Lehto, M. Thompson, L.F. Affholderbach, K. Barberio, E. Böhrer, A. Brandt, S. Burkhardt, H. Feigl, E. Grupen, C. Hess, J. Lutters, G. Meinhard, H. Minguet-Rodriguez, J. Mirabito, L. Neugebauer, E. Ngac, A. Prange, G. Rivera, F. Saraiva, P. Schäfer, U. Sieler, U. Smolik, L. Stephan, F. Trier, H. Apollonio, M. Borean, C. Bosisio, L. Della Marina, R. Giannini, G. Gobbo, B. Musolino, G. Pitis, L. He, H. Kim, H. Putz, J. Rothberg, J. Armstrong, S.R. Bellantoni, L. Berkelman, K. Cinabro, D. Conway, J.S. Cranmer, K. Elmer, P. Feng, Z. Ferguson, D.P.S. Gao, Y. González, S. Grahl, J. Harton, J.L. Hayes, O.J. Hu, H. Jin, S. Johnson, R.P. Kile, J. McNamara, P.A. Nielsen, J. Orejudos, W. Pan, Y.B. Saadi, Y. Scott, I.J. Sharma, V. Walsh, A.M. Walsh, J. Wear, J. von Wimmersperg-Toeller, J.H. Wu, J. Wu, S.L. Wu, X. Yamartino, J.M. Zobernig, G. Dissertori, G. Abdallah, J. Abreu, P. Adam, W. Adzic, P. Albrecht, T. Alemany-Fernandez, R. Allmendinger, T. Allport, P.P. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Ask, S. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barbier, R. Bardin, D. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belous, K. Ben-Haim, E. Benekos, N. Benvenuti, A. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bloch, D. Blom, M. Bluj, M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Botner, O. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bracko, M. Brenner, R. Brodet, E. Bruckman, P. Brunet, J.M. Bugge, L. Buschbeck, B. Buschmann, P. Calvi, M. Camporesi, T. Canale, V. Carena, F. Castro, N. Cavallo, F. Chapkin, M. Charpentier, P. Checchia, P. Chierici, R. Chliapnikov, P. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cosme, G. Cossutti, F. Costa, M.J. Crawley, B. Crennell, D. Cuevas, J. D'Hondt, J. Dalmau, J. da Silva, T. Da Silva, W. Della Ricca, G. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Maria, N. De Min, A. de Paula, L. Di Ciaccio, L. Di Simone, A. Doroba, K. Drees, J. Dris, M. Duperrin, A. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferro, F. Flagmeyer, U. Foeth, H. Fokitis, E. Fulda-Quenzer, F. Fuster, J. Gandelman, M. Garcia, C. Gavillet, P. Gazis, E. Gele, D. Gokieli, R. Golob, B. Gomez-Ceballos, G. Gonçalves, P. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hallgren, A. Hamacher, K. Hamilton, K. Haug, S. Hauler, F. Hedberg, V. Hennecke, M. Herr, H. Hoffman, J. Holmgren, S.-O. Holt, P.J. Houlden, M.A. Hultqvist, K. Jackson, J.N. Jarlskog, G. Jarry, P. Jeans, D. Johansson, E.K. Johansson, P.D. Jonsson, P. Joram, C. Jungermann, L. Kapusta, F. Katsanevas, S. Katsoufis, E. Kernel, G. Kersevan, B.P. Kerzel, U. Kiiskinen, A. King, B.T. Kjaer, N.J. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krumstein, Z. Kucharczyk, M. Lamsa, J. Leder, G. Ledroit, F. Leinonen, L. Leitner, R. Lemonne, J. Lepeltier, V. Lesiak, T. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lopes, J.H. Lopez, J.M. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Malek, A. Maltezos, S. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Mazzucato, F. Mazzucato, M. Mc Nulty, R. Meroni, C. Meyer, W.T. Migliore, E. Mitaroff, W. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, R. Montenegro, J. Moraes, D. Morettini, P. Mueller, U. Muenich, K. Mulders, M. Mundim, L. Murray, W. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F. Nawrocki, K. Nemecek, S. Nicolaidou, R. Nikolaenko, V. Nikolenko, M. Oblakowska-Mucha, A. Obraztsov, V. Olshevski, A. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Palacios, J.P. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Perepelitsa, V. Perrotta, A. Petrolini, A. Piedra, J. Pieri, L. Pierre, F. Pimenta, M. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Pukhaeva, N. Pullia, A. Radojicic, D. Rames, J. Ramler, L. Read, A. Rebecchi, P. Rehn, J. Reid, D. Reinhardt, R. Renton, P. Richard, F. Ridky, J. Ripp-Baudot, I. Rivero, M. Rodriguez, D. Romero, A. Ronchese, P. Rosenberg, E. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ryabtchikov, D. Sadovsky, A. Salmi, L. Salt, J. Sander, C. Savoy-Navarro, A. Schwickerath, U. Segar, A. Sekulin, R. Siebel, M. Simard, L. Sisakian, A. Smadja, G. Smirnova, O. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Stanitzki, M. Stocchi, A. Strauss, J. Stugu, B. Szczekowski, M. Szeptycka, M. Szumlak, T. Tabarelli, T. Taffard, A.C. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tkatchev, L. Tobin, M. Todorovova, S. Tomé, B. Tonazzo, A. Tortosa, P. Travnicek, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Uvarov, V. Valenti, G. Van Dam, P. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Veloso, F. Venus, W. Verbeure, F. Verdier, P. Verzi, V. Vilanova, D. Vitale, L. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J. Wilkinson, G. Winter, M. Witek, M. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zhuravlov, V. Zimin, N.I. Zintchenko, A. Zupan, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Anderhub, H. Andreev, V.P. Anselmo, F. Arefiev, A. Azemoon, T. Aziz, T. Bagnaia, P. Bajo, A. Baksay, G. Baksay, L. Baldew, S.V. Banerjee, S. Barczyk, A. Barillère, R. Bartalini, P. Basile, M. Batalova, N. Battiston, R. Bay, A. Behner, F. Bellucci, L. Berbeco, R. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Biasini, M. Biglietti, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Böhm, A. Boldizsar, L. Borgia, B. Bottai, S. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brochu, F. Burger, J.D. Burger, W.J. Cai, X.D. Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A. Casaus, J. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Chamizo, M. Chang, Y.H. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chiefari, G. Cifarelli, L. Cindolo, F. Clare, I. Clare, R. Coignet, G. Colino, N. Costantini, S. de la Cruz, B. Cucciarelli, S. de Asmundis, R. Déglon, P. Debreczeni, J. Degré, A. Dehmelt, K. Deiters, K. della Volpe, D. Delmeire, E. Denes, P. DeNotaristefani, F. De Salvo, A. Diemoz, M. Dierckxsens, M. Dionisi, C. Dittmar, M. Doria, A. Dova, M.T. Duchesneau, D. Duda, M. Echenard, B. Eline, A. El Hage, A. El Mamouni, H. Engler, A. Eppling, F.J. Extermann, P. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisher, W. Forconi, G. Freudenreich, K. Furetta, C. Galaktionov, Y. Ganguli, S.N. Garcia-Abia, P. Gataullin, M. Gentile, S. Giagu, S. Gong, Z.F. Grenier, G. Grimm, O. Gruenewald, M.W. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hatzifotiadou, D. Hebbeker, T. Hervé, A. Hirschfelder, J. Hofer, H. Hohlmann, M. Holzner, G. Hou, S.R. Jin, B.N. Jindal, P. Jones, L.W. de Jong, P. Josa-Mutuberría, I. Kaur, M. Kienzle-Focacci, M.N. Kim, J.K. Kirkby, J. Kittel, W. Klimentov, A. König, A.C. Kopal, M. Koutsenko, V. Kräber, M. Kraemer, R.W. Krüger, A. Kunin, A. de Guevara, P.L. Laktineh, I. Landi, G. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Le Goff, J.M. Leiste, R. Levtchenko, M. Levtchenko, P. Li, C. Likhoded, S. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Luci, C. Luminari, L. Lustermann, W. Ma, W.G. Malgeri, L. Malinin, A. Maña, C. Mans, J. Martin, J.P. Marzano, F. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Muanza, G.S. Muijs, A.J.M. Musy, M. Nagy, S. Natale, S. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Nisati, A. Novak, T. Nowak, H. Ofierzynski, R. Organtini, G. Pal, I. Palomares, C. Paolucci, P. Paramatti, R. Passaleva, G. Patricelli, S. Paul, T. Pauluzzi, M. Paus, C. Pauss, F. Pedace, M. Pensotti, S. Perret-Gallix, D. Piccolo, D. Pierella, F. Pieri, M. Pioppi, M. Piroué, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Pothier, J. Prokofiev, D. Rahal-Callot, G. Rahaman, M.A. Raics, P. Raja, N. Ramelli, R. Rancoita, P.G. Ranieri, R. Raspereza, A. Razis, P. Rembeczki, S. Ren, D. Rescigno, M. Reucroft, S. Riemann, S. Riles, K. Roe, B.P. Romero, L. Rosca, A. Rosemann, C. Rosenbleck, C. Rosier-Lees, S. Roth, S. Rubio, J.A. Ruggiero, G. Rykaczewski, H. Sakharov, A. Saremi, S. Sarkar, S. Salicio, J. Sanchez, E. Schäfer, C. Schegelsky, V. Schopper, H. Schotanus, D.J. Sciacca, C. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Son, D. Souga, C. Spillantini, P. Steuer, M. Stickland, D.P. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Sushkov, S. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tarjan, P. Tauscher, L. Taylor, L. Tellili, B. Teyssier, D. Timmermans, C. Ting, S.C.C. Ting, S.M. Tonwar, S.C. Tóth, J. Tully, C. Tung, K.L. Ulbricht, J. Valente, E. Van de Walle, R.T. Vasquez, R. Vesztergombi, G. Vetlitsky, I. Viertel, G. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobiev, I. Vorobyov, A.A. Wadhwa, M. Wang, Q. Wang, X.L. Wang, Z.M. Weber, M. Wynhoff, S. Xia, L. Xu, Z.Z. Yamamoto, J. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Yeh, S.C. Zalite, A. Zalite, Y. Zhang, Z.P. Zhao, J. Zhu, G.Y. Zhu, R.Y. Zhuang, H.L. Zichichi, A. Zimmermann, B. Zöller, M. Abbiendi, G. Ackerstaff, K. Ainsley, C. Åkesson, P.F. Alexander, G. Allison, J. Altekamp, N. Ametewee, K. Anagnostou, G. Anderson, K.J. Anderson, S. Arcelli, S. Asai, S. Ashby, S.F. Axen, D. Azuelos, G. Ball, A.H. Bailey, I. Barillari, T. Barlow, R.J. Bartoldus, R. Batley, R.J. Baumann, S. Bechtle, P. Bechtluft, J. Beeston, C. Behnke, T. Bell, K.W. Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bentvelsen, S. Berlich, P. Bethke, S. Biebel, O. Boeriu, O. Blobel, V. Bloodworth, I.J. Bloomer, J.E. Bobinski, M. Bock, P. Bonacorsi, D. Bosch, H.M. Boutemeur, M. Bouwens, B.T. Braibant, S. Brigliadori, L. Brown, R.M. Burckhart, H.J. Burgard, C. Bürgin, R. Cammin, J. Campana, S. Capiluppi, P. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Chrisman, D. Ciocca, C. Clarke, P.E.L. Clay, E. Cohen, I. Conboy, J.E. Cooke, O.C. Couchman, J. Couyoumtzelis, C. Coxe, R.L. Csilling, A. Cuffiani, M. Dado, S. Dallapiccola, C. Dallavalle, M. Dallison, S. De Jong, S. De Roeck, A. Dervan, P. De Wolf, E.A. del Pozo, L.A. Desch, K. Dienes, B. Dixit, M.S. do Couto e Silva, E. Donkers, M. Doucet, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Edwards, J.E.G. Estabrooks, P.G. Etzion, E. Evans, H.G. Evans, M. Fabbri, F. Fanti, M. Fath, P. Feld, L. Ferrari, P. Fiedler, F. Fierro, M. Fischer, H.M. Fleck, I. Folman, R. Fong, D.G. Ford, M. Foucher, M. Frey, A. Fürtjes, A. Futyan, D.I. Gagnon, P. Gary, J.W. Gascon, J. Gascon-Shotkin, S.M. Gaycken, G. Geddes, N.I. Geich-Gimbel, C. Geralis, T. Giacomelli, G. Giacomelli, P. Giacomelli, R. Gibson, V. Gibson, W.R. Gingrich, D.M. Giunta, M. Glenzinski, D. Goldberg, J. Goodrick, M.J. Gorn, W. Graham, K. Grandi, C. Gross, E. Grunhaus, J. Gruwé, M. Günther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Hansroul, M. Hapke, M. Harder, K. Harel, A. Hargrove, C.K. Harin-Dirac, M. Hart, P.A. Hartmann, C. Hauke, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Hensel, C. Herndon, M. Herten, G. Heuer, R.D. Hildreth, M.D. Hill, J.C. Hillier, S.J. Hilse, T. Hobson, P.R. Hocker, A. Hoffman, K. Homer, R.J. Honma, A.K. Horváth, D. Hossain, K.R. Howard, R. Hughes-Jones, R.E. Hüntemeyer, P. Igo-Kemenes, P. Imrie, D.C. Ingram, M.R. Ishii, K. Jacob, F.R. Jawahery, A. Jeffreys, P.W. Jeremie, H. Jimack, M. Joly, A. Jones, C.R. Jones, G. Jones, M. Jost, U. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karapetian, G. Karlen, D. Kartvelishvili, V. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kim, D.H. King, B.J. Kirk, J. Klein, K. Klier, A. Kluth, S. Kobayashi, T. Kobel, M. Koetke, D.S. Kokott, T.P. Kolrep, M. Komamiya, S. Kowalewski, R.V. Krämer, T. Krasznahorkay, A. Kress, T. Krieger, P. von Krogh, J. Kuhl, T. Kupper, M. Kyberd, P. Lafferty, G.D. Lahmann, R. Lai, W.P. Landsman, H. Lanske, D. Lauber, J. Lautenschlager, S.R. Lawson, I. Layter, J.G. Lazic, D. Lee, A.M. Lefebvre, E. Leins, A. Lellouch, D. Letts, J. Levinson, L. Lewis, C. Liebisch, R. Lillich, J. List, B. List, J. Littlewood, C. Lloyd, A.W. Lloyd, S.L. Loebinger, F.K. Long, G.D. Losty, M.J. Lu, J. Ludwig, A. Ludwig, J. Macchiolo, A. Macpherson, A. Mader, W. Mannelli, M. Marcellini, S. Marchant, T.E. Markus, C. Martin, A.J. Martinez, G. Mashimo, T. Matthews, W. Mättig, P. McDonald, W.J. McKenna, J. Mckigney, E.A. McMahon, T.J. McNab, A.I. McPherson, R.A. Mendez-Lorenzo, P. Meijers, F. Menges, W. Menke, S. Merritt, F.S. Mes, H. Meyer, N. Meyer, J. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Mir, R. Mohr, W. Montanari, A. Mori, T. Morii, M. Müller, U. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nellen, B. Nijjhar, B. Nisius, R. O'Neale, S.W. Oakham, F.G. Odorici, F. Ogren, H.O. Oh, A. Okpara, A. Oldershaw, N.J. Omori, T. Oreglia, M.J. Orito, S. Pahl, C. Pálinkás, J. Pásztor, G. Pater, J.R. Patrick, G.N. Patt, J. Pearce, M.J. Petzold, S. Pfeifenschneider, P. Pilcher, J.E. Pinfold, J. Plane, D.E. Poffenberger, P. Polok, J. Poli, B. Pooth, O. Posthaus, A. Przybycien, M. Przysiezniak, H. Quadt, A. Rabbertz, K. Rees, D.L. Rembser, C. Renkel, P. Rick, H. Rigby, D. Robertson, S. Robins, S.A. Rodning, N. Roney, J.M. Rooke, A. Ros, E. Rosati, S. Roscoe, K. Rossi, A.M. Rosvick, M. Routenburg, P. Rozen, Y. Runge, K. Runolfsson, O. Ruppel, U. Rust, D.R. Rylko, R. Sachs, K. Saeki, T. Sahr, O. Sarkisyan, E.K.G. Sasaki, M. Sbarra, C. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schenk, P. Schieck, J. Schmitt, S. Schörner-Sadenius, T. Schröder, M. Schultz-Coulon, H.C. Schulz, M. Schumacher, M. Schütz, P. Schwick, C. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Shepherd-Themistocleous, C.H. Sherwood, P. Siroli, G.P. Sittler, A. Skillman, A. Skuja, A. Smith, A.M. Smith, T.J. Snow, G.A. Sobie, R. Söldner-Rembold, S. Spagnolo, S. Spano, F. Springer, R.W. Sproston, M. Stahl, A. Steiert, M. Stephens, K. Steuerer, J. Stockhausen, B. Stoll, K. Strom, D. Ströhmer, R. Strumia, F. Stumpf, L. Surrow, B. Szymanski, P. Tafirout, R. Talbot, S.D. Tanaka, S. Taras, P. Tarem, S. Taylor, R.J. Tasevsky, M. Teuscher, R. Thiergen, M. Thomson, M.A. von Törne, E. Torrence, E. Towers, S. Toya, D. Trefzger, T. Trigger, I. Trócsányi, Z. Tsukamoto, T. Tsur, E. Turcot, A.S. Turner-Watson, M.F. Ueda, I. Ujvári, B. Utzat, P. Vachon, B. Van Kooten, R. Vannerem, P. Vértesi, R. Verzocchi, M. Vikas, P. Vincter, M. Vokurka, E.H. Vollmer, C.F. Voss, H. Vossebeld, J. Wäckerle, F. Wagner, A. Waller, D. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wetterling, D. White, J.S. Wilkens, B. Wilson, G.W. Wilson, J.A. Wotton, S. Wyatt, T.R. Yamashita, S. Yekutieli, G. Zacek, V. Zer-Zion, D. Zivkovic, L.
Subjects: High Energy Physics::Experiment
Abstract: Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3fb-1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130GeV to 209GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant W W and Z Z production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron-positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose-Einstein correlations between the two W decay systems arising in W W production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B (W → had), and the trilinear gauge-boson self-couplings g1 Z, κγ and λγ are determined to be: mW=80.376±0.033GeV ΓW=2.195±0.083GeV B(W→had)=67.41±0.27% g1 Z=0.9840+0.018 -0.020 κγ=0.982±0.042λγ=-0.022±0.019. © 2013 Elsevier B.V.
Published: 2013

19. New limit on the lepton-flavour violating decay mu -> e gamma

Author: MEG collaboration, Adam, J., Bai, X., Baldini, A. M., Baracchini, E., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Cerri, C., de Bari, A., De Gerone, M., Doke, T., Dussoni, S., Egger, J., Fratini, K., Fujii, Y., Galli, L., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hisamatsu, Y., Ignatov, F., Iwamoto, T., Kettle, P. -R., Khazin, B. I., Kiselev, O., Korenchenko, A., Kravchuk, N., Maki, A., Mihara, S., Molzon, W., Mori, T., Mzavia, D., Natori, H., Nicolò, D., Nishiguchi, H., Nishimura, Y., Ootani, W., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Renga, F., Ritt, S., Rossella, M., Sawada, R., Sergiampietri, F., Signorelli, G., Suzuki, S., Tenchini, F., Topchyan, C., Uchiyama, Y., Valle, R., Voena, C., Xiao, F., Yamada, S., Yamamoto, A., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: High Energy Physics - Phenomenology, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton flavour violating decay mu->e gamma. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10**14 muon decays, gives a 90% C.L. upper limit of 2.4 x 10**-12 on the branching ratio of the mu->e gamma decay, constituting the most stringent limit on the existence of this decay to date., Comment: 5 pages, 2 figures, accepted for publication at Phys. Rev. Lett
Published: 2011

20. New limit on the lepton-flavour violating decay mu -> e gamma

Author: MEG Collaboration, Adam, J., Bai, X., Baldini, A. M., Baracchini, E., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Cerri, C., de Bari, A., De Gerone, M., Doke, T., Dussoni, S., Egger, J., Fratini, K., Fujii, Y., Galli, L., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hisamatsu, Y., Ignatov, F., Iwamoto, T., Kettle, P. -R., Khazin, B. I., Kiselev, O., Korenchenko, A., Kravchuk, N., Maki, A., Mihara, S., Molzon, W., Mori, T., Mzavia, D., Natori, H., Nicol��, D., Nishiguchi, H., Nishimura, Y., Ootani, W., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Renga, F., Ritt, S., Rossella, M., Sawada, R., Sergiampietri, F., Signorelli, G., Suzuki, S., Tenchini, F., Topchyan, C., Uchiyama, Y., Valle, R., Voena, C., Xiao, F., Yamada, S., Yamamoto, A., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences, High Energy Physics::Experiment
Abstract: We present a new result based on an analysis of the data collected by the MEG detector at the Paul Scherrer Institut in 2009 and 2010, in search of the lepton flavour violating decay mu->e gamma. The likelihood analysis of the combined data sample, which corresponds to a total of 1.8 x 10**14 muon decays, gives a 90% C.L. upper limit of 2.4 x 10**-12 on the branching ratio of the mu->e gamma decay, constituting the most stringent limit on the existence of this decay to date., 5 pages, 2 figures, accepted for publication at Phys. Rev. Lett
Published: 2011
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21. A limit for the mu -> e gamma decay from the MEG experiment

Author: MEG collaboration, Adam, J., Bai, X., Baldini, A., Baracchini, E., Barchiesi, A., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cecchet, G., Cei, F., Cerri, C., De Bari, A., De Gerone, M., Doke, T., Dussoni, S., Egger, J., Galli, L., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hisamatsu, Y., Ignatov, F., Iwamoto, T., Kaneko, D., Kettle, P. -R., Khazin, B. I., Kiselev, O., Korenchenko, A., Kravchuk, N., Maki, A., Mihara, S., Molzon, W., Mori, T., Mzavia, D., Natori, H., Nardò, R., Nicolò, D., Nishiguchi, H., Nishimura, Y., Ootani, W., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Renga, F., Ritt, S., Rossella, M., Sawada, R., Schneebeli, M., Sergiampietri, F., Signorelli, G., Suzuki, S., Topchyan, C., Tumakov, V., Uchiyama, Y., Valle, R., Voena, C., Xiao, F., Yamada, S., Yamamoto, A., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: High Energy Physics - Phenomenology, Astrophysics::High Energy Astrophysical Phenomena, Physics::Medical Physics, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: A search for the decay mu -> e gamma, performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.). This corresponds to the measurement of positrons and photons from ~ 10**14 stopped mu-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector., Comment: 13 pages, 9 figures. v2: improved estimate of photon reconstruction efficiency
Published: 2009

22. A limit for the mu -> e gamma decay from the MEG experiment

Author: MEG Collaboration, Adam, J., Bai, X., Baldini, A., Baracchini, E., Barchiesi, A., Bemporad, C., Boca, G., Cattaneo, P. W., Cavoto, G., Cecchet, G., Cei, F., Cerri, C., De Bari, A., De Gerone, M., Doke, T., Dussoni, S., Egger, J., Galli, L., Gallucci, G., Gatti, F., Golden, B., Grassi, M., Grigoriev, D. N., Haruyama, T., Hildebrandt, M., Hisamatsu, Y., Ignatov, F., Iwamoto, T., Kaneko, D., Kettle, P. -R., Khazin, B. I., Kiselev, O., Korenchenko, A., Kravchuk, N., Maki, A., Mihara, S., Molzon, W., Mori, T., Mzavia, D., Natori, H., Nard��, R., Nicol��, D., Nishiguchi, H., Nishimura, Y., Ootani, W., Panareo, M., Papa, A., Pazzi, R., Piredda, G., Popov, A., Renga, F., Ritt, S., Rossella, M., Sawada, R., Schneebeli, M., Sergiampietri, F., Signorelli, G., Suzuki, S., Topchyan, C., Tumakov, V., Uchiyama, Y., Valle, R., Voena, C., Xiao, F., Yamada, S., Yamamoto, A., Yamashita, S., Yudin, Yu. V., and Zanello, D.
Subjects: High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Physics::Medical Physics, FOS: Physical sciences, High Energy Physics::Experiment
Abstract: A search for the decay mu -> e gamma, performed at PSI and based on data from the initial three months of operation of the MEG experiment, yields an upper limit on the branching ratio of BR(mu -> e gamma) < 2.8 x 10**-11 (90% C.L.). This corresponds to the measurement of positrons and photons from ~ 10**14 stopped mu-decays by means of a superconducting positron spectrometer and a 900 litre liquid xenon photon detector., 13 pages, 9 figures. v2: improved estimate of photon reconstruction efficiency
Published: 2009
Full Text: View/download PDF

23. Search for invisibly decaying Higgs bosons in $e^{+}e^{-} \rightarrow Z^{0}h^{0}$ production at $\sqrt{s} = 183 - 209 GeV$

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, K.W., Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, R.M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, J.W., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, M., Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Herten, G., Heuer, R.D., Hill, J.C., Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krasznahorkay, A., Jr., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mattig, P., McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, N., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, D.E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, M., Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, D., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, L.
Subjects: Condensed Matter::Quantum Gases, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Zo boson in e+e- collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb-1. The analysis aims to select events containing the hadronic decay products of the Zo boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Zo boson are derived. Assuming a branching ratio BR(ho->invisible)=1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained. A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Z 0 boson in e+e− collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb −1 . The analysis aims to select events containing the hadronic decay products of the Z 0 boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Z 0 boson are derived. Assuming a branching ratio BR(h0→invisible)=1 , a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained. A search is performed for Higgs bosons decaying into invisible final states, produced in association with a Zo boson in e+e- collisions at energies between 183 and 209 GeV. The search is based on data samples collected by the OPAL detector at LEP corresponding to an integrated luminosity of about 660 pb-1. The analysis aims to select events containing the hadronic decay products of the Zo boson and large missing momentum, as expected from Higgs boson decay into a pair of stable weakly interacting neutral particles, such as the lightest neutralino in the Minimal Supersymmetric Standard Model. The same analysis is applied to a search for nearly invisible Higgs boson cascade decays into stable weakly interacting neutral particles. No excess over the expected background from Standard Model processes is observed. Limits on the production of invisibly decaying Higgs bosons produced in association with a Zo boson are derived. Assuming a branching ratio BR(ho->invisible)=1, a lower limit of 108.2 GeV is placed on the Higgs boson mass at the 95% confidence level. Limits on the production of nearly invisibly decaying Higgs bosons are also obtained.
Published: 2007

24. Nuclear-matter modification of decay widths in the $\phi \to e^{+}e^{-}$ and $\phi \to K^{+}K^{-}$ channels

Author: Sakuma, F., Chiba, J., En'yo, H., Fukao, Y., Funahashi, H., Hamagaki, H., Ieiri, M., Ishino, M., Kanda, H., Kitaguchi, M., Mihara, S., Miwa, K., Miyashita, T., Murakami, T., Muto, R., Nakura, T., Naruki, M., Ozawa, K., Sasaki, O., Sekimoto, M., Tabaru, T., Tanaka, K. H., Togawa, M., Yamada, S., Yokkaichi, S., and Yoshimura, Y.
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: The invariant mass spectra of $\phi \to K^{+}K^{-}$ are measured in 12 GeV $p+A$ reactions in order to search for the in-medium modification of $\phi$ mesons. The observed $K^{+}K^{-}$ spectra are well reproduced by the relativistic Breit-Wigner function with a combinatorial background shape in three $\beta\gamma$ regions between 1.0 and 3.5. The nuclear mass-number dependence of the yields of the $K^{+}K^{-}$ decay channel is compared to the simultaneously measured $e^{+}e^{-}$ decay channel for carbon and copper targets. We parameterize the production yields as $\sigma (A) = \sigma_0 \times A^\alpha$ and obtain $\alpha_{\phi\to K^+K^-} - \alpha_{\phi\to e^+e^-}$ to be 0.14 $\pm$ 0.12. Limits are obtained for the partial decay widths of $\phi$ mesons in nuclear matter., Comment: 5 pages, 4 figures
Published: 2006

25. Nuclear-matter modification of decay widths in the $��\to e^{+}e^{-}$ and $��\to K^{+}K^{-}$ channels

Author: Sakuma, F., Chiba, J., En'yo, H., Fukao, Y., Funahashi, H., Hamagaki, H., Ieiri, M., Ishino, M., Kanda, H., Kitaguchi, M., Mihara, S., Miwa, K., Miyashita, T., Murakami, T., Muto, R., Nakura, T., Naruki, M., Ozawa, K., Sasaki, O., Sekimoto, M., Tabaru, T., Tanaka, K. H., Togawa, M., Yamada, S., Yokkaichi, S., and Yoshimura, Y.
Subjects: Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: The invariant mass spectra of $��\to K^{+}K^{-}$ are measured in 12 GeV $p+A$ reactions in order to search for the in-medium modification of $��$ mesons. The observed $K^{+}K^{-}$ spectra are well reproduced by the relativistic Breit-Wigner function with a combinatorial background shape in three $��$ regions between 1.0 and 3.5. The nuclear mass-number dependence of the yields of the $K^{+}K^{-}$ decay channel is compared to the simultaneously measured $e^{+}e^{-}$ decay channel for carbon and copper targets. We parameterize the production yields as $��(A) = ��_0 \times A^��$ and obtain $��_{��\to K^+K^-} - ��_{��\to e^+e^-}$ to be 0.14 $\pm$ 0.12. Limits are obtained for the partial decay widths of $��$ mesons in nuclear matter., 5 pages, 4 figures
Published: 2006
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26. Search for neutral MSSM Higgs bosons at LEP

Author: Schael, S. Barate, R. Bruneliére, R. de Bonis, I. Decamp, D. Goy, C. Jézéquel, S. Lees, J.-P. Martin, F. Merle, E. Minard, M.-N. Pietrzyk, B. Trocmé, B. Bravo, S. Casado, M.P. Chmeissani, M. Crespo, J.M. Fernandez, E. Fernandez-Bosman, M. Garrido, L. Martinez, M. Pacheco, A. Ruiz, H. Colaleo, A. Creanza, D. de Filippis, N. de Palma, M. Iaselli, G. Maggi, G. Maggi, M. Nuzzo, S. Ranieri, A. Raso, G. Ruggieri, F. Selvaggi, G. Silvestris, L. Tempesta, P. Tricomi, A. Zito, G. Huang, X. Lin, J. Ouyang, Q. Wang, T. Xie, Y. Xu, R. Xue, S. Zhang, J. Zhang, L. Zhao, W. Abbaneo, D. Barklow, T. Buchmüller, O. Cattaneo, M. Clerbaux, B. Drevermann, H. Forty, R.W. Frank, M. Gianotti, F. Hansen, J.B. Harvey, J. Hutchcroft, D.E. Janot, P. Jost, B. Kado, M. Mato, P. Moutoussi, A. Ranjard, F. Rolandi, L. Schlatter, D. Teubert, F. Valassi, A. Videau, I. Badaud, F. Dessagne, S. Falvard, A. Fayolle, D. Gay, P. Jousset, J. Michel, B. Monteil, S. Pallin, D. Pascolo, J.M. Perret, P. Hansen, J.D. Hansen, J.R. Hansen, P.H. Kraan, A.C. Nilsson, B.S. Kyriakis, A. Markou, C. Simopoulou, E. Vayaki, A. Zachariadou, K. Blondel, A. Brient, J.-C. Machefert, F. Rougé, A. Videau, H. Ciulli, V. Focardi, E. Parrini, G. Antonelli, A. Antonelli, M. Bencivenni, G. Bossi, F. Capon, G. Cerutti, F. Chiarella, V. Mannocchi, G. Laurelli, P. Mannocchi, G. Murtas, G.P. Passalacqua, L. Kennedy, J. Lynch, J.G. Negus, P. O'Shea, V. Thompson, A.S. Wasserbaech, S. Cavanaugh, R. Dhamotharan, S. Geweniger, C. Hanke, P. Hepp, V. Kluge, E.E. Putzer, A. Stenzel, H. Tittel, K. Wunsch, M. Beuselinck, R. Cameron, W. Davies, G. Dornan, P.J. Girone, M. Marinelli, N. Nowell, J. Rutherford, S.A. Sedgbeer, J.K. Thompson, J.C. White, R. Ghete, V.M. Girtler, P. Kneringer, E. Kuhn, D. Rudolph, G. Bouhova-Thacker, E. Bowdery, C.K. Clarke, D.P. Ellis, G. Finch, A.J. Foster, F. Hughes, G. Jones, R.W.L. Pearson, M.R. Robertson, N.A. Smizanska, M. van der Aa, O. Delaere, C. Leibenguth, G. Lemaitre, V. Blumenschein, U. Holldorfer, F. Jakobs, K. Kayser, F. Müller, A.-S. Renk, B. Sander, H.-G. Schmeling, S. Wachsmuth, H. Zeitnitz, C. Ziegler, T. Bonissent, A. Coyle, P. Curtil, C. Ealet, A. Fouchez, D. Payre, P. Tilquin, A. Ragusa, F. David, A. Dietl, H. Ganis, G. Hüttmann, K. Lütjens, G. Männer, W. Moser, H.-G. Settles, R. Villegas, M. Wolf, G. Boucrot, J. Callot, O. Davier, M. Duflot, L. Grivaz, J.-F. Heusse, P. Jacholkowska, A. Serin, L. Veillet, J.-J. Azzurri, P. Bagliesi, G. Boccali, T. Foà, L. Giammanco, A. Giassi, A. Ligabue, F. Messineo, A. Palla, F. Sanguinetti, G. Sciabà, A. Sguazzoni, G. Spagnolo, P. Tenchini, R. Venturi, A. Verdini, P.G. Awunor, O. Blair, G.A. Cowan, G. Garcia-Bellido, A. Green, M.G. Medcalf, T. Misiejuk, A. Strong, J.A. Teixeira-Dias, P. Clifft, R.W. Edgecock, T.R. Norton, P.R. Tomalin, I.R. Ward, J.J. Bloch-Devaux, B. Boumediene, D. Colas, P. Fabbro, B. Lancon, E. Lemaire, M.-C. Locci, E. Perez, P. Rander, J. Tuchming, B. Vallage, B. Litke, A.M. Tayíor, G. Booth, C.N. Cartwright, S. Combley, F. Hodgson, P.N. Lehto, M. Thompson, L.F. Böhrer, A. Brandt, S. Grupen, C. Hess, J. Ngac, A. Prange, G. Borean, C. Giannini, G. He, H. Putz, J. Rothberg, J. Armstrong, S.R. Berkelman, K. Cranmer, K. Ferguson, D.P.S. Gao, Y. González, S. Hayes, O.J. Hu, H. Jin, S. Kile, J. McNamara, P.A. Nielsen, J. Pan, Y.B. von Wimmersperg-Toeller, J.H. Wiedenmann, W. Wu, J. Wu, S.L. Wu, X. Zobernig, G. Dissertori, G. Abdallah, J. Abreu, P. Adam, W. Adzic, P. Albrecht, T. Alderweireld, T. Alemany-Fernandez, R. Allmendinger, T. Allport, P.P. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Ask, S. Asman, B. Augustin, J.E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barbier, R. Bardin, D. Barker, G.J. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Ben-Haim, E. Benekos, N. Benvenuti, A. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bloch, D. Blom, M. Bluj, M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Botner, O. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bracko, M. Brenner, R. Brodet, E. Bruckman, P. Brunet, J.M. Buschbeck, B. Buschmann, P. Calvi, M. Camporesi, T. Canale, V. Carena, F. Castro, N. Cavallo, F. Chapkin, M. Charpentier, P. Checchia, P. Chierici, R. Chliapnikov, P. Chudoba, J. Chung, S.U. Cieslik, K. Collins, P. Contri, R. Cosme, G. Cossutti, F. Costa, M.J. Crennell, D. Cuevas, J. D'Hondt, J. Dalmau, J. da Silva, T. da Silva, W. della Ricca, G. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Maria, N. de Min, A. de Paula, L. di Ciaccio, L. di Simone, A. Doroba, K. Drees, J. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Espirito Santo, M.C. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferro, F. Flagmeyer, U. Foeth, H. Fokitis, E. Fulda-Quenzer, F. Fuster, J. Gandelman, M. Garcia, C. Gavillet, P. Gazis, E. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hallgren, A. Hamacher, K. Hamilton, K. Haug, S. Hauler, F. Hedberg, V. Hennecke, M. Herr, H. Hoffman, J. Holmgren, S.-O. Holt, P.J. Houlden, M.A. Hultqvist, K. Jackson, J.N. Jarlskog, G. Jarry, P. Jeans, D. Johansson, E.K. Johansson, P.D. Jonsson, P. Joram, C. Jungermann, L. Kapusta, F. Katsanevas, S. Katsoufis, E. Kernel, G. Kersevan, B.P. Kerzel, U. King, B.T. Kjaer, N.J. Kluit, P. Kokkinias, P. Kourkoumelis, C. Kouznetsov, O. Krumstein, Z. Kucharczyk, M. Lamsa, J. Leder, G. Ledroit, F. Leinonen, L. Leitner, R. Lemonne, J. Lepeltier, V. Lesiak, T. Liebig, W. Liko, D. Lipniacka, A. Lopes, J.H. Lopez, J.M. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Malek, A. Maltezos, S. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Mazzucato, F. Mazzucato, M. Mc Nulty, R. Meroni, C. Migliore, E. Mitaroff, W. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, R. Montenegro, J. Moraes, D. Moreno, S. Morettini, P. Mueller, U. Muenich, K. Mulders, M. Mundim, L. Murray, W. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F. Nawrocki, K. Nicolaidou, R. Nikolenko, M. Oblakowska-Mucha, A. Obraztsov, V. Olshevski, A. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Palacios, J.P. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Perrotta, A. Petrolini, A. Piedra, J. Pieri, L. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Pozdniakov, V. Pukhaeva, N. Pullia, A. Rames, J. Read, A. Rebecchi, P. Rehn, J. Reid, D. Reinhardt, R. Renton, P. Richard, F. Ridky, J. Rivero, M. Rodriguez, D. Romero, A. Ronchese, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ryabtchikov, D. Sadovsky, A. Salmi, L. Salt, J. Sander, C. Savoy-Navarro, A. Schwickerath, U. Segar, A. Sekulin, R. Siebel, M. Sisakian, A. Smadja, G. Smirnova, O. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Stanitzki, M. Stocchi, A. Strauss, J. Stugu, B. Szczekowski, M. Szeptycka, M. Szumlak, T. Tabarelli, T. Taffard, A.C. Tegenfeldt, F. Timmermans, J. Tkatchev, L. Tobin, M. Todorovova, S. Tome, B. Tonazzo, A. Tortosa, P. Travnicek, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Uvarov, V. Valenti, G. van Dam, P. van Eldik, J. van Remortel, N. van Vulpen, I. Vegni, G. Veloso, F. Venus, W. Verdier, P. Verzi, V. Vilanova, D. Vitale, L. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J. Wilkinson, G. Winter, M. Witek, M. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zhuravlov, V. Zimin, N.I. Zintchenko, A. Zupan, M. Achard, P. Adriani, O. Aguilar-Benitez, M. Alcaraz, J. Alemanni, G. Allaby, J. Aloisio, A. Alviggi, M.G. Anderhub, H. Andreev, V.P. Anselmo, F. Arefiev, A. Azemoon, T. Aziz, T. Bagnaia, P. Bajo, A. Baksay, G. Baksay, L. Baldew, S.V. Banerjee, S. Banerjee, S.W. Barczyk, A. Barillere, R. Bartalini, P. Basile, M. Batalova, N. Battiston, R. Bay, A. Becattini, F. Becker, U. Behner, F. Bellucci, L. Berbeco, R. Berdugo, J. Berges, P. Bertucci, B. Betev, B.L. Biasini, M. Biglietti, M. Biland, A. Blaising, J.J. Blyth, S.C. Bobbink, G.J. Bohm, A. Boldizsar, L. Borgia, B. Bottai, S. Bourilkov, D. Bourquin, M. Braccini, S. Branson, J.G. Brochu, F. Burger, J.D. Burger, W.J. Cai, X.D. Capell, M. Cara Romeo, G. Carlino, G. Cartacci, A. Casaus, J. Cavallari, F. Cavallo, N. Cecchi, C. Cerrada, M. Chamizo, M. Chang, Y.H. Chemarin, M. Chen, A. Chen, G. Chen, G.M. Chen, H.F. Chen, H.S. Chiefari, G. Cifarelli, L. Cindolo, F. Clare, I. Clare, R. Coignet, G. Colino, N. Costantini, S. de la Cruz, B. Cucciarelli, S. de Asmundis, R. Deglon, P. Debreczeni, J. Degre, A. Dehmelt, K. Deiters, K. della Volpe, D. Delmeire, E. Denes, P. DeNotaristefani, F. de Salvo, A. Diemoz, M. Dierckxsens, M. Dionisi, C. Dittmar, M. Doria, A. Dova, M.T. Duchesneau, D. Duda, M. Echenard, B. Eline, A. El Hage, A. El Mamouni, H. Engler, A. Eppling, F.J. Extermann, P. Falagan, M.A. Falciano, S. Favara, A. Fay, J. Fedin, O. Felcini, M. Ferguson, T. Fesefeldt, H. Fiandrini, E. Field, J.H. Filthaut, F. Fisher, P.H. Fisher, W. Forconi, G. Freudenreich, K. Furetta, C. Galaktionov, Yu. Ganguli, S.N. Garcia-Abia, P. Gataullin, M. Gentile, S. Giagu, S. Gong, Z.F. Grenier, G. Grimm, O. Gruenewald, M.W. Guida, M. Gupta, V.K. Gurtu, A. Gutay, L.J. Haas, D. Hatzifotiadou, D. Hebbeker, T. Hervé, A. Hirschfelder, J. Hofer, H. Hohlmann, M. Holzner, G. Hou, S.R. Hu, J. Jin, B.N. Jindal, P. Jones, L.W. de Jong, P. Josa-Mutuberría, I. Kaur, M. Kienzle-Focacci, M.N. Kim, J.K. Kirkby, J. Kittel, W. Klimentov, A. Konig, A.C. Kopal, M. Koutsenko, V. Kräber, M. Kraemer, R.W. Krüger, A. Kunin, A. Ladron de Guevara, P. Laktineh, I. Landi, G. Lebeau, M. Lebedev, A. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, P. Le Goff, J.M. Leiste, R. Levtchenko, M. Levtchenko, P. Li, C. Likhoded, S. Lin, C.H. Lin, W.T. Linde, F.L. Lista, L. Liu, Z.A. Lohmann, W. Longo, E. Lu, Y.S. Luci, C. Luminari, L. Lustermann, W. Ma, W.G. Malgeri, L. Malinin, A. Ma na, C. Mans, J. Martin, J.P. Marzano, F. Mazumdar, K. McNeil, R.R. Mele, S. Merola, L. Meschini, M. Metzger, W.J. Mihul, A. Milcent, H. Mirabelli, G. Mnich, J. Mohanty, G.B. Muanza, G.S. Muijs, A.J.M. Musicar, B. Musy, M. Nagy, S. Natale, S. Napolitano, M. Nessi-Tedaldi, F. Newman, H. Nisati, A. Novak, T. Nowak, H. Ofierzynski, R. Organtini, G. Pal, I. Palomares, C. Paolucci, P. Paramatti, R. Passaleva, G. Patricelli, S. Paul, T. Pauluzzi, M. Paus, C. Pauss, F. Pedace, M. Pensotti, S. Perret-Gallix, D. Piccolo, D. Pierella, F. Pieri, M. Pioppi, M. Piroue, P.A. Pistolesi, E. Plyaskin, V. Pohl, M. Pojidaev, V. Pothier, J. Prokofiev, D. Rahal-Callot, G. Rahaman, M.A. Raics, P. Raja, N. Ramelli, R. Rancoita, P.G. Ranieri, R. Raspereza, A. Razis, P. Rembeczki, S. Ren, D. Rescigno, M. Reucroft, S. Riemann, S. Riles, K. Roe, B.P. Romero, L. Rosca, A. Rosemann, C. Rosenbleck, C. Rosier-Lees, S. Roth, S. Rubio, J.A. Ruggiero, G. Rykaczewski, H. Sakharov, A. Saremi, S. Sarkar, S. Salicio, J. Sanchez, E. Schafer, C. Schegelsky, V. Schopper, H. Schotanus, D.J. Sciacca, C. Servoli, L. Shevchenko, S. Shivarov, N. Shoutko, V. Shumilov, E. Shvorob, A. Son, D. Souga, C. Spillantini, P. Steuer, M. Stickland, D.P. Stoyanov, B. Straessner, A. Sudhakar, K. Sultanov, G. Sun, L.Z. Sushkov, S. Suter, H. Swain, J.D. Szillasi, Z. Tang, X.W. Tarjan, P. Tauscher, L. Taylor, L. Tellili, B. Teyssier, D. Timmermans, C. Ting, S.C.C. Ting, S.M. Tonwar, S.C. Tóth, J. Tully, C. Tung, K.L. Ulbricht, J. Valente, E. van de Walle, R.T. Vasquez, R. Vesztergombi, G. Vetlitsky, I. Viertel, G. Vivargent, M. Vlachos, S. Vodopianov, I. Vogel, H. Vogt, H. Vorobiev, I. Vorobyov, A.A. Wadhwa, M. Wang, Q. Wang, X.L. Wang, Z.M. Weber, M. Wynhoff, S. Xia, L. Xu, Z.Z. Yamamoto, J. Yang, B.Z. Yang, C.G. Yang, H.J. Yang, M. Yeh, S.C. Zalite, A. Zalite, Y. Zhang, Z.P. Zhao, J. Zhu, G.Y. Zhu, R.Y. Zhuang, H.L. Zichichi, A. Zimmermann, B. Zoller, M. Abbiendi, G. Ainsley, C. Åkesson, P.F. Alexander, G. Allison, J. Amaral, P. Anagnostou, G. Anderson, K.J. Asai, S. Axen, D. Azuelos, G. Bailey, I. Barberio, E. Barillari, T. Barlow, R.J. Batley, R.J. Bechtle, P. Behnke, T. Bell, K.W. Bell, P.J. Bella, G. Bellerive, A. Benelli, G. Bethke, S. Biebel, O. Boeriu, O. Bock, P. Boutemeur, M. Braibant, S. Brigliadori, L. Brown, R.M. Buesser, K. Burckhart, H.J. Campana, S. Carnegie, R.K. Carter, A.A. Carter, J.R. Chang, C.Y. Charlton, D.G. Ciocca, C. Csilling, A. Cuffiani, M. Dado, S. de Jong, S. de Roeck, A. de Wolf, E.A. Desch, K. Dienes, B. Donkers, M. Dubbert, J. Duchovni, E. Duckeck, G. Duerdoth, I.P. Etzion, E. Fabbri, F. Feld, L. Ferrari, P. Fiedler, F. Fleck, I. Ford, M. Frey, A. Gagnon, P. Gary, J.W. Gascon-Shotkin, S.M. Gaycken, G. Geich-Gimbel, C. Giacomelli, G. Giacomelli, P. Giunta, M. Goldberg, J. Gross, E. Grunhaus, J. Gruwé, M. Günther, P.O. Gupta, A. Hajdu, C. Hamann, M. Hanson, G.G. Harel, A. Hauschild, M. Hawkes, C.M. Hawkings, R. Hemingway, R.J. Herten, G. Heuer, R.D. Hill, J.C. Hoffman, K. Horváth, D. Igo-Kemenes, P. Ishii, K. Jeremie, H. Jost, U. Jovanovic, P. Junk, T.R. Kanaya, N. Kanzaki, J. Karlen, D. Kawagoe, K. Kawamoto, T. Keeler, R.K. Kellogg, R.G. Kennedy, B.W. Kluth, S. Kobayashi, T. Kobel, M. Komamiya, S. Krámer, T. Krieger, P. von Krogh, J. Kruger, K. Kuhl, T. Kupper, M. Lafferty, G.D. Landsman, H. Lanske, D. Layter, J.G. Lellouch, D. Letts, J. Levinson, L. Lillich, J. Lloyd, S.L. Loebinger, F.K. Lu, J. Ludwig, A. Ludwig, J. Mader, W. Marcellini, S. Martin, A.J. Masetti, G. Mashimo, T. Mattig, P. McKenna, J. McPherson, R.A. Meijers, F. Menges, W. Merritt, F.S. Mes, H. Meyer, N. Michelini, A. Mihara, S. Mikenberg, G. Miller, D.J. Moed, S. Mohr, W. Mori, T. Mutter, A. Nagai, K. Nakamura, I. Nanjo, H. Neal, H.A. Nisius, R. O'Neale, S.W. Oh, A. Oreglia, M.J. Orito, S. Pahl, C. Pásztor, G. Pater, J.R. Pilcher, J.E. Pinfold, J. Plane, D.E. Poli, B. Pooth, O. Przybycien, M. Quadt, A. Rabbertz, K. Rembser, C. Renkel, P. Roney, J.M. Rozen, Y. Runge, K. Sachs, K. Saeki, T. Sarkisyan, E.K.G. Schaile, A.D. Schaile, O. Scharff-Hansen, P. Schieck, J. Schörner-Sadenius, T. Schroder, M. Schumacher, M. Scott, W.G. Seuster, R. Shears, T.G. Shen, B.C. Sherwood, P. Skuja, A. Smith, A.M. Sobie, R. Söldner-Rembold, S. Spano, F. Stahl, A. Strom, D. Ströhmer, R. Tarem, S. Tasevsky, M. Teuscher, R. Thomson, M.A. Torrence, E. Toya, D. Tran, P. Trigger, I. Trócsányi, Z. Tsur, E. Turner-Watson, M.F. Ueda, I. Ujvári, B. Vollmer, C.F. Vannerem, P. Vértesi, R. Verzocchi, M. Voss, H. Vossebeld, J. Ward, C.P. Ward, D.R. Watkins, P.M. Watson, A.T. Watson, N.K. Wells, P.S. Wengler, T. Wermes, N. Wilson, G.W. Wilson, J.A. Wolf, G. Wyatt, T.R. Yamashita, S. Zer-Zion, D. Zivkovic, L. Heinemeyer, S. Pilaftsis, A. Weiglein, G.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for the neutral Higgs bosons which are predicted by the Minimal Supersymmetric standard model (MSSM). The data of the four collaborations are statistically combined and examined for their consistency with the background hypothesis and with a possible Higgs boson signal. The combined LEP data show no significant excess of events which would indicate the production of Higgs bosons. The search results are used to set upper bounds on the cross-sections of various Higgs-like event topologies. The results are interpreted within the MSSM in a number of "benchmark" models, including CP-conserving and CP-violating scenarios. These interpretations lead in all cases to large exclusions in the MSSM parameter space. Absolute limits are set on the parameter tan β and, in some scenarios, on the masses of neutral Higgs bosons.
Published: 2006

27. Precision electroweak measurements on the Z resonance

Author: Schael, S Barate, R Bruneliere, R Buskulic, D De Bonis, I Decamp, D Ghez, P Goy, C Jezequel, S Lees, JP and Lucotte, A Martin, F Merle, E Minard, MN Nief, JY and Odier, P Pietrzyk, B Trocme, B Bravo, S Casado, MP and Chmeissani, M Comas, P Crespo, JM Fernandez, E and Fernandez-Bosman, M Garrido, L Grauges, E Juste, A and Martinez, M Merino, G Miquel, R Mir, LM Orteu, S and Pacheco, A Park, IC Perlas, J Riu, I Ruiz, H and Sanchez, F Colaleo, A Creanza, D De Filippis, N de Palma, M Iaselli, G Maggi, G Maggi, M Nuzzo, S and Ranieri, A Raso, G Ruggieri, F Selvaggi, G Silvestris, L and Tempesta, P Tricomi, A Zito, G Huang, X Lin, J and Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J and Zhang, L Zhao, W Abbaneo, D Bazarko, A Becker, U and Boix, G Bird, F Blucher, E Bonvicini, B Bright-Thomas, P and Barklow, T Buchmuller, O Cattaneo, M Cerutti, F and Ciulli, V Clerbaux, B Drevermann, H Forty, RW Frank, M and Greening, TC Hagelberg, R Halley, AW Gianotti, F and Girone, M Hansen, JB Harvey, J Jacobsen, R Hutchcroft, DE Janot, R Jost, B Knobloch, J Kado, M Lehraus, I and Lazeyras, P Maley, R Mato, P May, J Moutussi, A and Pepe-Altarelli, M Ranjard, F Rolandi, L Schlatter, D and Schmitt, B Schneider, O Tejessy, W Teubert, F Tomalin, IR Tournefier, E Veenhof, R Valassi, A Wiedenmann, W and Wright, AE Ajaltouni, Z Badaud, F Chazelle, G Deschamps, O Dessagne, S Falvard, A Ferdi, C Fayolle, D Gay, P and Guicheney, C Henrard, P Jousset, J Michel, B and Monteil, S Montret, JC Pallin, D Pascolo, JM Perret, P and Podlyski, F Bertelsen, H Fernley, T Hansen, JD and Hansen, JR Hansen, PH Kraan, AC Lindahl, A Mollerud, R and Nilsson, BS Rensch, B Waananen, A Daskalakis, G and Kyriakis, A Markou, C Simopoulou, E Siotis, I Vayaki, A and Zachariadou, K Blondel, A Bonneaud, G Brient, JC and Machefert, E Rouge, A Rumpf, M Swynghedauw, M Tanaka, R and Verderi, M Videau, H Ciulli, V Focardi, E Parrini, G and Zachariadou, K Corden, M Georgiopoulos, C Antonelli, A and Antonelli, M Bencivenni, G Bologna, G Bossi, F and Campana, P Capon, G Cerutti, F Chiarella, V Felici, G and Laurelli, P Mannocchi, G Murtas, GP Passalacqua, L and Picchi, P Colrain, P Ten Have, I Hughes, IS Kennedy, J and Knowles, IG Lynch, JG Morton, WT Negus, P O'Shea, V and Raine, C Reeves, P Scarr, JM Smith, K Thompson, AS and Turnbull, RM Wasserbaech, S Buchmuller, O Cavanaugh, R and Dhamotharan, S Geweniger, C Hanke, P Hansper, G and Hepp, V Kluge, EE Putzer, A Sommer, J Stenzel, H and Tittel, K Werner, W Wunsch, M Beuselinck, R Binnie, DM and Cameron, W Davies, G Dornan, PJ Goodsir, S and Marinelli, N Martin, EB Nash, J Nowell, J Rutherford, SA and Sedgbeer, JK Thompson, JC White, R Williams, MD and Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G and Bouhova-Thacker, E Bowdery, CK Buck, PG Clarke, DP and Ellis, G Finch, AJ Foster, F Hughes, G Jones, RWL and Keemer, NR Pearson, MR Robertson, NA Sloan, T Smizanska, M Snow, SW Williams, MI van der Aa, O Delaere, C and Leibenguth, G Lemaitre, V Bauerdick, LAT Blumenschein, U and van Gemmeren, P Giehl, I Holldorfer, F Jakobs, K and Kasemann, M Kayser, F Kleinknecht, K Muller, AS Quast, G and Renk, B Rohne, E Sander, HG Schmeling, S Wachsmuth, H Wanke, R Zeitnitz, C Ziegler, T Aubert, JJ and Benchouk, C Bonissent, A Carr, J Coyle, P Curtil, C and Ealet, A Etienne, F Fouchez, D Motsch, F Payre, P and Rousseau, D Tilquin, A Talby, M Thulasides, M Aleppo, M and Antonelli, M Ragusa, F Buscher, V David, A Dietl, H and Ganis, G Huttmann, K Lutjens, G Mannert, C Manner, W and Moser, HG Settles, R Seywerd, H Stenzel, H Villegas, M Wiedenmann, W Wolf, G Azzurri, P Boucrot, J and Callot, O Chen, S Cordier, A Davier, M Duflot, L and Grivaz, JF Heusse, P Jacholkowska, A Le Diberder, F and Lefrancois, J Mutz, AM Schune, MH Serin, L Veillet, JJ and Videau, I Zerwas, D Azzurri, P Bagliesi, G and Bettarini, S Boccali, T Bozzi, C Calderini, G Dell'Orso, R Fantechi, R Ferrante, I Fidecaro, F Foa, L and Giammanco, A Giassi, A Gregorio, A Ligabue, F Lusiani, A and Marrocchesi, PS Messineo, A Palla, F Rizzo, G and Sanguinetti, G Sciaba, A Sguazzoni, G Spagnolo, P and Steinberger, J Tenchini, R Venturi, A Vannini, C and Venturi, A Verdini, PG Awunor, O Blair, GA Cowan, G and Garcia-Bellido, A Green, MG Medcalf, T Misiejuk, A and Strong, JA Teixeira-Dias, P Botterill, DR Clifft, RW and Edgecock, TR Edwards, M Haywood, SJ Norton, PR Tomalin, IR Ward, JJ Bloch-Devaux, B Boumediene, D Colas, P and Emery, S Fabbro, B Kozanecki, W Lancon, E Lemaire, MC and Locci, E Perez, P Rander, J Renardy, JF Roussarie, A and Schuller, JP Schwindling, J Tuchming, B Vallage, B and Black, SN Dann, JH Kim, HY Konstantinidis, N Litke, AM and McNeil, MA Taylor, G Booth, CN Cartwright, S and Combley, F Hodgson, PN Lehto, M Thompson, LF and Affholderbach, K Barberio, E Bohrer, A Brandt, S and Burkhardt, H Feigl, E Grupen, C Hess, J Lutters, G and Meinhard, H Minguet-Rodriguez, J Mirabito, L Misiejuk, A and Neugebauer, E Ngac, A Prange, G Rivera, F Saraiva, P and Schafer, U Sieler, U Smolik, L Stephan, F Trier, H and Apollonio, M Borean, C Bosisio, L Della Marina, R and Giannini, G Gobbo, B Musolino, G Pitis, L He, H Kim, H Putz, J Rothberg, J Armstrong, SR Bellantoni, L and Berkelman, K Cinabro, D Conway, JS Cranmer, K Elmer, P and Feng, Z Ferguson, DPS Gao, Y Gonzalez, S Grahl, J and Harton, JL Hayes, OJ Hu, H Jin, S Johnson, RP and Kile, J McNamara, PA Nielsen, J Orejudos, W Pan, Y and Saadi, Y Scott, IJ Sharma, V Walsh, AM Walsh, J and Wear, J von Wimmersperg-Toeller, JH Wiedenmann, W Wu, J and Wu, SL Wu, X Yamartino, JM Zobernig, G Dissertori, G and Abdallah, J Abreu, P Adam, W Adye, T Adzic, P and Ajinenko, I Albrecht, T Alderweireld, T Alekseev, GD and Alemany-Fernandez, R Allmendinger, T Allport, PP Almehed, S and Amaldi, U Amapane, N Amato, S Anashkin, E and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Anjos, N Antilous, P Apel, WD Arnoud, Y Ask, S and Asman, B Augustin, JE Augustinus, A Baillon, P and Ballestrero, A Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, D Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A and Beilliere, P Belokopytov, Y Belous, K Ben-Haim, E and Benekos, N Benvenuti, A Berat, C Berggren, M Berntzon, L and Bertini, D Bertrand, D Besancon, M Besson, N and Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D and Blom, M Bluj, M Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Boyko, I Bozovic, I Bozzo, M Bracko, M Branchini, P and Brenke, T Brenner, R Brodet, E Bruckman, P Brunet, JM and Bugge, L Buran, T Burgsmueller, T Buschbeck, B and Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC and Camporesi, T Canale, V Canepa, M Carena, F Carroll, L Caso, C Gimenez, MVC Castro, N Cattai, A Cavallo, F Cerruti, C Chabaud, V Chapkin, M Charpentier, P and Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R and Chliapnikov, R Chochula, P Chorowicz, V Chudoba, J and Chung, SU Cieslik, K Collins, P Colomer, M Contri, R and Cortina, E Cosme, G Cossuti, F Costa, MJ Cowell, JH and Crawley, HB Crennell, D Crepe, S Crosetti, G Cuevas, J and Czellar, S D'Hondt, J Dalmagne, B Dalmau, J and Damgaard, G Davenport, M da Silva, T Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W de Brabandere, S De Clercq, C De Lotto, B De Maria, N De Min, A de Paula, L Dijkstra, H and Di Ciaccio, L Di Diodato, A Di Simone, A Djannati, A and Dolbeau, J Doroba, K Dracos, M Drees, J Drees, KA and Dris, M Duperrin, A Durand, JD Ehret, R Eigen, G and Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP and Erzen, B Santo, MCE Falk, E Fanourakis, G Fassouliotis, D Fayot, J Feindt, M Fenyuk, A Fernandez, J Ferrari, P Ferrer, A Ferrer-Ribas, E Ferro, F Fichet, S and Firestone, A Fischer, PA Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Garcia, J Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, E Gele, D Gerber, JP Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG and Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V and Grahl, J Graziani, E Green, C Grefrath, A Grimm, HJ and Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J and Haag, C Hahn, F Hahn, S Hallgren, A Hamacher, K and Hamilton, K Hansen, J Harris, FJ Haug, S Hauler, F and Hedberg, V Heising, S Hennecke, M Henriques, R and Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM and Higon, E Hoffman, J Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, MA Hrubec, J Huber, M Huet, K Hughes, GJ Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G and Jarry, P Jean-Marie, B Jeans, D Johansson, EK and Johansson, PD Jonsson, P Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, E and Keranen, R Kernel, G Kersevan, BP Kerzel, U and Khomenko, BA Khovanski, NN Kiiskinen, A King, BT Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P Knoblauch, D and Kokkinias, P Konopliannikov, A Koratzinos, M and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kreuter, C Kriznic, E Krstic, J Krumstein, Z Kubinec, P and Kucewicz, W Kucharczyk, M Kurowska, J Kurvinen, K and Lamsa, J Lanceri, L Lane, DW Langefeld, P Lapin, V and Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lemonne, J and Lenzen, G Lepeltier, V Lesiak, T Lethuillier, M Libby, J and Liebig, W Liko, D Lipniacka, A Lippi, I Loerstad, B and Lokajicek, M Loken, JG Lopes, JH Lopez, JM and Lopez-Femandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Maltezos, S Malychev, V Mandl, F Marco, J Marco, R and Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C and Matthiae, G Mazik, J Mazzucato, F Mazzucato, M McCubbin, M McKay, R McNulty, R Meroni, C Meyer, WT Miagkov, A and Migliore, E Mirabito, L Mitaroff, W Mjoernmark, U and Moa, T Moch, M Moeller, R Moenig, K Monge, R and Montenegro, J Moraes, D Moreau, X Moreno, S Morettini, P and Morton, G Mueller, U Muenich, K Mulders, M and Mulet-Marquis, C Mundim, L Muresan, R Murray, W Muryn, B and Myatt, G Myklebust, T Naraghi, F Nassiakou, M and Navarria, F Navas, S Nawrocki, K Negri, P Neufeld, N and Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS and Nieuwenhuizen, M Niezurawski, P Nikolaenko, V Nikolenko, M and Nomokonov, V Normand, A Nygren, A Oblakowska-Mucha, A and Obraztsov, V Olshevski, A Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Oyanguren, A Paganini, P and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, JP and Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O and Pavel, T Pegoraro, M Peralta, L Perepelitsa, V and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Philips, HT Piana, G Piedra, J Pieri, L Pierre, F and Pimenta, M Piotto, E Podobnik, T Poireau, V Pol, ME and Polok, G Polycarpo, E Poropat, P Pozdniakov, V and Privitera, R Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Rames, J Ramler, L Ratoff, PN Read, A Rebecchi, P Redaelli, NG Regler, M Rehn, J Reid, D Reinhardt, R Renton, P Resvanis, LK and Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Rivero, M and Rodriguez, D Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, R Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Ryabtchikov, D Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salmi, L Salt, J and Sampsonidis, D Sannino, M Savoy-Navarro, A Scheidle, T and Schneider, H Schwemling, P Schwering, B Schwickerath, U and Schyns, MAE Scuri, F Seager, P Sedykh, Y Segar, A and Seibert, N Sekulin, R Shellard, RC Sheridan, A 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and Kraemer, RW Krenz, W Kruger, A Kuijten, H Kunin, A and de Guevara, PL Laktineh, I Landi, G Lassila-Perini, K and Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P and Le Coultre, P Lee, HJ Le Goff, JM Leiste, R Leonardi, E and Levtchenko, M Levtchenko, P Li, C Likhoded, S Lin, CH Lin, WT Linde, FL Lista, L Liu, ZA Lohmann, W and Longo, E Lu, YS Lu, W Lubelsmeyer, K Luci, C Luckey, D Luminari, L Lugnier, L Lustermann, W Ma, WG Maity, M Malgeri, L Malinin, A Mana, C Mangeol, D Mans, J and Marchesini, P Marian, G Martin, JP Marzano, F and Massaro, GGG Mazumdar, K McNeil, RR Mele, S Merola, L and Merk, M Meschini, M Metzger, WJ von der Mey, M and Mihul, A Milcent, H Mirabelli, G Mnich, J Mohanty, GB and Molnar, P Monteleoni, B Moulik, T Muanza, GS Muheim, F Muijs, AJM Musicar, B Musy, M Nagy, S Natale, S and Napolitano, M Nessi-Tedaldi, F Newman, H Niessen, T and Nisati, A Novak, I Nowak, H Ofierzynski, R Organtini, G and Oulianov, A Pal, I Palomares, C Pandoulas, D and Paoletti, S 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C Clarke, PEL Clay, E Clayton, JC Cohen, I Collins, WJ Conboy, JE Cooke, OC Cooper, M Couch, M Couchman, J Coupland, M Silva, ED Coxe, RL Csilling, A Cuffiani, M Dado, S and Dallapiccola, C Dallavalle, GM Dallison, S Darling, C De Jong, S De Roeck, A De Wolf, EA Debu, P Deng, H and Deninno, MM Dervan, P Desch, K Dieckmann, A Dienes, B and Dittmar, M Dixit, MS Donkers, M Doucet, M Dubbert, J and Duboscq, JE Duchovni, E Duckeck, G Duerdoth, IP and Dumas, DJP Eckerlin, G Edwards, JEG Elcombe, PA and Estabrooks, PG Etzion, E Evans, HG Evans, M Fabbri, F and Fanti, M Fath, P Feld, L Ferrari, P Fiedler, F and Fierro, M Fincke-Keeler, M Fischer, HM Fleck, I Folman, R Fong, DG Ford, M Foucher, M Frey, A Furtjes, A and Fukui, H Fukunaga, C Futyan, DI Gagnon, P Gaidot, A and Ganel, O Gary, JW Gascon, J Gascon-Shotkin, SM Gaycken, G Geddes, NI Geich-Gimbel, C Gensler, SW Gentit, FX and Geralis, T Giacomelli, G Giacomelli, P Giacomelli, R and Gibson, V Gibson, WR Gillies, JD Gingrich, DM Giunta, M 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S Marchant, TE Maringer, G Markus, C Martin, A Martin, JP and Martinez, G Masetti, G Mashimo, T Matthews, W Maur, U and McDonald, WJ McGowan, RF McKenna, J Mckigney, EA and McMahon, TJ McNab, AI McNutt, J McPherson, AC McPherson, RA Meijers, F Mendez-Lorenzo, P Menges, W Menke, S and Menszner, D Merritt, FS Mes, H Meyer, J Meyer, N and Michelini, A Middleton, RP Mihara, S Mikenberg, G and Mildenberger, J Miller, DJ Milstene, C Mir, R Moed, S and Mohr, W Moisan, C Montanari, A Mori, T Morii, M and Moss, MW Mouthuy, T Muller, U Murphy, PG Mutter, A and Nagai, K Nakamura, I Nanjo, H Neal, HA Nellen, B and Nguyen, HH Nijjhar, B Nisius, R Nozaki, M Oakham, FG and Odorici, F Ogg, M Ogren, HO Oh, A Oh, H Okpara, A and Oldershaw, NJ Omori, T O'Neale, SW O'Neill, BP Oram, CJ Oreglia, MJ Orito, S Pahl, C Palinkas, J and Palmonari, F Pansart, JP Panzer-Steindel, B Paschievici, P and Pasztor, G Pater, JR Patrick, GN Pawley, SJ and Paz-Jaoshvili, N Pearce, MJ Petzold, S Pfeifenschneider, P and Pfister, P Pilcher, JE Pinfold, J Pitman, D Plane, DE Poffenberger, P Poli, B Polok, J Pooth, O and Posthaus, A Pouladdej, A del Poz, LA Prebys, E and Pritchard, TW Przybycien, M Przysiezniak, H Quadt, A and Quast, G Rabbertz, K Raith, B Redmond, MW Rees, DL and Rembser, C Renkel, P Richards, GE Rick, H Rigby, D and Riles, K Robins, SA Robinson, D Rodning, N Rollnik, A and Roney, JM Rooke, A Ros, E Rosati, S Roscoe, K and Rossberg, S Rossi, AM Rosvick, M Routenburg, P Rozen, Y and Runge, K Runolfsson, O Ruppel, U Rust, DR Rylko, R and Sachs, K Saeki, T Sahr, O Sanghera, S Sarkisyan, EKG and Sasaki, M Sbarra, C Schaile, AD Schaile, O and Schappert, W Scharf, F Scharff-Hansen, P Schenk, P and Schieck, J Schmitt, B von der Schmitt, H Schmitt, S and Schorner-Sadenius, T Schreiber, S Schroder, M Schutz, P and Schultz-Coulon, HC Schulz, M Schumacher, M Schwarz, J and Schwick, C Schwiening, J Scott, WG Settles, M Seuster, R and Shears, TG Shen, BC Shepherd-Themistocleous, CH and Sherwood, P Shypit, R Simon, A Singh, P Siroli, GP and Sittler, A Skillman, A Skuja, A Smith, AM Smith, TJ and Snow, GA Sobie, R Soldner-Rembold, S Spagnolo, S Spano, F Springer, RW Sproston, M Stahl, A Starks, M and Steiert, M Stephens, K Steuerer, J Stier, HE and Stockhausen, B Stoll, K Strohmer, R Strom, D Strumia, F and Stumpf, L Surrow, B Szymanski, P Tafirout, R Takeda, H Takeshita, T Talbot, SD Tanaka, S Taras, P Tarem, S Tasevsky, M Taylor, RJ Tecchio, M Teixeira-Dias, P and Tesch, N Teuscher, R Thackray, NJ Thiergen, M Thomas, J and Thomson, MA von Torne, E Torrence, E Towers, S Toya, D Trocsanyi, Z Tran, P Transtromer, G Trefzger, T and Tresilian, NJ Trigger, I Tscheulin, M Tsukamoto, T Tsur, E Turcot, AS Tumer-Watson, MF Tysarczyk-Niemeyer, G and Ueda, I Ujvari, B Utzat, P Vachon, B Van den Plas, D and Van Kooten, R VanDalen, GJ Vannerem, P Vasseur, G and Vertesi, R Verzocchi, M Vikas, P Vincter, M Virtue, CJ and Vokurka, EH Vollmer, CF Voss, H Vossebeld, J and Wackerle, F Wagner, A Wagner, DL Wahl, C Walker, JP and Waller, D Ward, CP Ward, DR Ward, JJ Watkins, PM and Watson, AT Watson, NK Weber, M Weber, P Weisz, S and Wels, PS Wengler, T Wermes, N Wetterling, D Weymann, M and Whalley, MA White, JS Wilkens, B Wilson, JA Wilson, GW Wingerter, I Winterer, VH Wlodek, T Wolf, G Wood, NC Wotton, S Wyatt, TR Yaari, R Yamashita, S Yang, Y and Yeaman, A Yekutieli, G Yurko, M Zacek, V Zacharov, I and Zer-Zion, D Zeuner, W Zivkovic, L Zorn, GT Abe, K and Abe, K Abe, T Abt, I Acton, PD Adam, I Agnew, G and Akagi, T Akimoto, H Allen, NJ Ash, WW Aston, D and Bacchetta, N Baird, KG Baltay, C Band, HR Barakat, MB and Baranko, GJ Bardon, O Barklow, TL Bashindzhagian, GL and Battiston, R Bauer, JM Bazarko, AO Bean, A Bellodi, G and Ben-David, R Benvenuti, AC Berger, R Biasini, M and Bienz, T Bilei, GM Bisello, D Blaylock, G Bogart, J and Bolen, B Bolton, T Bower, GR Brau, JE Breidenbach, M and Bugg, WM Burke, D Burnett, TH Burrows, PN Busza, W and Calcaterra, A Caldwell, DO Camanzi, B Carpinelli, M and Carr, J Cassell, R Castaldi, R Castro, A Cavalli-Sforza, M Chadwick, GB Chou, A Church, E Claus, R Cohn, HO and Coller, JA Convery, MR Cook, V Cotton, R Cowan, RF and Coyle, PA Coyne, DG Crawford, G D'Oliveira, A and Damerell, CJS Daoudi, M Dasu, S de Groot, N de Sangro, R and De Simone, P De Simone, S Dell'Orso, R Dervan, PJ and Dima, M Dong, DN Doser, M Du, PYC Dubois, R Duboscq, JE Eigen, G Eisenstein, BI Elia, R Erdos, E and Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D and Fan, C Fernandez, JP Fero, MJ Flood, K Frey, R and Friedman, JI Furuno, K Garwin, EL Gillman, T Gladding, G and Gonzalez, S Hallewell, GD Hart, EL Harton, JL Hasan, A Hasegawa, Y Hasuko, K Hedges, S Hertzbach, SS and Hildreth, MD Hitlin, DG Honma, A Huber, JS Huffer, ME and Hughes, EW Huynh, X Hwang, H Iwasaki, M Iwasaki, Y and Izen, JM Jackson, DJ Jacques, P Jaros, JA Jiang, ZY and Johnson, AS Johnson, JR Johnson, RA Junk, T and Kajikawa, R Kalelkar, M Kamyshkov, YA Kang, HJ Karliner, I Kawahara, H Kelsey, MH Kendall, HW Kim, YD King, M and King, R Kofler, R Krishna, NM Kwon, Y Labs, JF and Kroeger, RS Langston, M Lath, A Lauber, JA Leith, DWG and Lia, V Lin, C Liu, MX Loreti, M Lu, A Lynch, HL and Ma, J Mancinelli, G Manly, S Mantovani, G and Markiewicz, TW Maruyama, T Masuda, H Mazzucato, H and McGowan, JF McKemey, AK Meadows, BT Messner, R Mockett, PM Moffeit, KC Moore, TB Morii, M Mours, B Muller, D and Mueller, G Murzin, V Nagamine, T Narita, S and Nauenberg, U Neal, H Nesom, G Nussbaum, M Ohnishi, Y and Oishi, N Onoprienko, D Osborne, LS Panvini, RS Park, CH and Park, H Pavel, TJ Peruzzi, I Pescara, L Piccolo, M and Piemontese, L Pieroni, E Pitts, KT Plano, RJ and Prepost, R Prescott, CY Punkar, G Quigley, J Ratcliff, BN Reeves, K Reeves, TW Reidy, J Reinertsen, PL and Rensing, PE Rochester, LS Rothberg, JE Rowson, PC and Russell, JJ Saxton, OH Schalk, T Schindler, RH and Schneekloth, U Schumm, BA Schwiening, J Seiden, A Sen, S and Serbo, VV Servoli, L Shaevitz, MH Shank, JT Shapiro, G Sherden, DJ Shmakov, KD Simopoulos, C Sinev, NB and Smith, SR Smy, MB Snyder, JA Sokoloff, MD Staengle, H and Stahl, A Starner, P Steiner, H Steiner, R Strauss, MG Su, D Suekane, F Sugiyama, A Suzuki, A Suzuki, S and Swartz, M Szumilo, A Takahashi, T Taylor, FE Thaler, JJ Thom, J Torrence, E Trandafir, AI Turk, JD Usher, T Va'vra, J Vannini, C Vella, E Venuti, JP Verdier, R Verdini, PG Wagner, DL Wagner, SR Waite, AP and Walston, S Wang, J Watts, SJ Weidemann, AW Weiss, ER and Whitaker, JS White, SL Wickens, FJ Williams, DA and Williams, DC Williams, SH Willocq, S Wilson, RJ and Wisniewski, WJ Wittlin, JL Woods, M Word, GB Wright, TR and Wyss, J Yamamoto, RK Yamartino, JM Yang, XQ Yashima, J Yellin, SJ Young, CC Yuta, H Zapalac, G Zdarko, RW and Zeitlin, C Zhou, J ALEPH Collaborat DELPHI Collaborat and L3 Collaborat OPAL Collaborat SLD Collaborat
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.
Published: 2006

28. Determination of αS using jet rates at LEP with the OPAL detector

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, Robert M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krasznahorkay, A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.AKESSON, G.ALEXANDER, G.ANAGNOSTOU, K.J.ANDERSON, S.ASAI, D.AXEN, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, R.M.BROWN, H.J.BURCKHART, S.CAMPANA, P.CAPILUPPI, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, C.CIOCCA, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW, P.O.GUNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, D.HORVATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KRAMER, A.KRASZNAHORKAY, P.KRIEGER, J. VON KROGH, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU27, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, T.MASHIMO, P.MATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.PASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, O.POOTH, M.PRZYBYCIEN, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, A.M.ROSSI, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCHORNER-SADENIUS, M. SCHRODER, M. SCHUMACHER, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, A. SKUJA, A.M. SMITH, R. SOBIE, S. SOLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STROHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TROCSANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJVARI, C.F.VOLLMER, P.VANNEREM, R.VERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON1, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, and OPAL Collaboration
Subjects: Physics, Range (particle radiation), Jet (fluid), Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Detector, FOS: Physical sciences, 01 natural sciences, JADE (particle detector), High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: Hadronic events produced in e+e- collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected between 1995 and 2000 and correspond to energies of 91 GeV, 130-136 GeV and 161-209 GeV. The jet rates were determined using four different jet-finding algorithms (Cone, JADE, Durham and Cambridge). The differential two-jet rate and the average jet rate with the Durham and Cambridge algorithms were used to measure alpha(s) in the LEP energy range by fitting an expression in which order alpah_2s calculations were matched to a NLLA prediction and fitted to the data. Combining the measurements at different centre-of-mass energies, the value of alpha_s (Mz) was determined to be alpha(s)(Mz)=0.1177+-0.0006(stat.)+-0.0012$(expt.)+-0.0010(had.)+-0.0032(theo.) \., 40 pages, 17 figures, Submitted to Euro. Phys. J. C
Published: 2005

29. Colour reconnection in $e^{+}e^{-} \rightarrow W^{+}W^{-}$ at $\sqrt{s}=189-209 GeV$

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, Robert M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krasznahorkay, A., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: Physics::Space Physics, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: The effects of the final state interaction phenomenon known as colour reconnection are investigated at centre-of-mass energies in the range $\sqrt{s}~ 189-209 GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (nqqch) = 19.38+-0.05(stat.)+-0.08 (syst.). The effects of the final state interaction phenomenon known as colour reconnection are investigated at centre-of-mass energies in the range sqrt(s) ~ 189-209 GeV using the OPAL detector at LEP. Colour reconnection is expected to affect observables based on charged particles in hadronic decays of W+W-. Measurements of inclusive charged particle multiplicities, and of their angular distribution with respect to the four jet axes of the events, are used to test models of colour reconnection. The data are found to exclude extreme scenarios of the Sjostrand-Khoze Type I (SK-I) model and are compatible with other models, both with and without colour reconnection effects. In the context of the SK-I model, the best agreement with data is obtained for a reconnection probability of 37%. Assuming no colour reconnection, the charged particle multiplicity in hadronically decaying W bosons is measured to be (nqqch) = 19.38+-0.05(stat.)+-0.08 (syst.).
Published: 2005

30. Experimental signature of medium modifications for rho and omega mesons in the 12 GeV p+A reactions

Author: Naruki, M., Funahashi, H., Fukao, Y., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Miwa, K., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., En'yo, H., Muto, R., Tabaru, T., Yokkaichi, S., Chiba, J., Ieiri, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., Ozawa, K., and Hamagaki, H.
Subjects: Nuclear Theory, FOS: Physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: The invariant mass spectra of e+e- pairs produced in 12-GeV proton-induced nuclear reactions are measured at the KEK Proton-Synchrotron. On the low-mass side of the omega meson peak, a significant enhancement over the known hadronic sources has been observed. The mass spectra, including the excess, are well reproduced by a model that takes into account the density dependence of the vector meson mass modification, as theoretically predicted., 4 pages, 3 figures, Version accepted for Physical Review Letter
Published: 2005

31. Flavour-independent <tex>h^{0}A^{0}$</tex> search and two Higgs doublet model interpretation of neutral Higgs boson searches at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, Robert M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, and OPAL Collaboration
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Parameter space, 01 natural sciences, Higgs sector, Standard Model, Two-Higgs-doublet model, 0103 physical sciences, Higgs boson, CP violation, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, Boson
Abstract: Upper limits on the cross-section of the pair-production process e+e- -> h0A0 assuming 100% decays into hadrons, are derived from a new search for the h0A0 -> hadrons topology, independent of the hadronic flavour of the decay products. Searches for the neutral Higgs bosons h0 and A0, are used to obtain constraints on the Type II Two Higgs Doublet Model (2HDM(11)) with no CP violation in the Higgs sector and no additional non Standard Model particles besides the five Higgs bosons. The analysis combines LEP1 and LEP2 data collected with the OPAL detctor up to the highest available centre-of-mass energies. The searches are sensitive to the h0, A0 -> qq, gg,tau+tau- and h0 -> A0A0 decay modes of the Higgs bosons. The 2HDM(II) parameter space is explored in a detailed scan. Large regions of the 2HDM(II) parameter space are excluded at the 95% CL in the (mh, mA), (mh, tanb) and (mA, tanb) planes, using both direct neutral Higgs boson searches and indirect limits derived from Standard Model high precision measurements. The region 1 lesssim mh lesssim 55 GeV and 3 lesssim mA lesssim 63 GeV is excluded at 95% CL independently of the choice of the 2HDM(II) parameters. Upper limits on the cross-section of the pair-production process e+e- -> h0A0 assuming 100% decays into hadrons, are derived from a new search for the h0A0 -> hadrons topology, independent of the hadronic flavour of the decay products. Searches for the neutral Higgs bosons h0 and A0, are used to obtain constraints on the Type II Two Higgs Doublet Model (2HDM(11)) with no CP violation in the Higgs sector and no additional non Standard Model particles besides the five Higgs bosons. The analysis combines LEP1 and LEP2 data collected with the OPAL detctor up to the highest available centre-of-mass energies. The searches are sensitive to the h0, A0 -> qq, gg,tau+tau- and h0 -> A0A0 decay modes of the Higgs bosons. The 2HDM(II) parameter space is explored in a detailed scan. Large regions of the 2HDM(II) parameter space are excluded at the 95% CL in the (mh, mA), (mh, tanb) and (mA, tanb) planes, using both direct neutral Higgs boson searches and indirect limits derived from Standard Model high precision measurements. The region 1 lesssim mh lesssim 55 GeV and 3 lesssim mA lesssim 63 GeV is excluded at 95% CL independently of the choice of the 2HDM(II) parameters.
Published: 2005

32. Evidence for in-medium modification of the $��$ meson at normal nuclear density

Author: Muto, R., En'yo, H., Naruki, M., Tabaru, T., Yokkaichi, S., Chiba, J., Ieiri, M., Sasaki, O., Sekimoto, M., Tanaka, K. H., Funahashi, H., Fukao, Y., Kitaguchi, M., Ishino, M., Kanda, H., Mihara, S., Miyashita, T., Miwa, K., Murakami, T., Nakura, T., Sakuma, F., Togawa, M., Yamada, S., Yoshimura, Y., Hamagaki, H., and Ozawa, K.
Subjects: Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract: Invariant mass spectra of e+e- pairs have been measured in 12 GeV p+A reactions to detect possible in-medium modification of vector mesons. Copper and carbon targets are used to study the nuclear-size dependence of e+e- invariant mass distributions. A significant excess on the low-mass side of the phi meson peak is observed in the low beta gamma (=beta/sqrt(1-beta^2)) region of phi mesons (beta gamma < 1.25) with copper targets. However, in the high beta gamma region (beta gamma > 1.25), spectral shapes of phi mesons are well described by the Breit-Wigner shape when experimental effects are considered. Thus, in addition to our earlier publication on rho / omega modification, this study has experimentally verified vector meson mass modification at normal nuclear density., 4 pages, 4 figures
Published: 2005
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33. Measurement of event shape distributions and moments in $e^{+}e^{-} \to$ hadrons at 91-209 GeV and a determination of $\alpha_{s}$

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, Robert M., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., Roeck, A.De, Wolf, E.A.De, Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Fanfani, A., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., Krogh, J.von, Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Montanari, A., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 209 GeV. We present distributions of event shape observables and their moments at each energy and compare with QCD Monte Carlo models. From the event shape distributions we extract the strong coupling alpha_s and test its evolution with energy scale. The results are consistent with the running of alpha_s expected from QCD. Combining all data, the value of alpha_s (M_z) is determined to be alpha_s(Mz)=0.1191+-0.0005(stat.)+-0.0010 (expt.)+-0.0011(hadr.)+-0.0044(theo.) The energy evolution of the moments is also used to determine a value of alpha_ with slightly larger errors: alpha_s(Mz)=0.1223+-0.0005(stat.) +-0.0014(expt.) +-0.0016(hadr.) +0.0054 -0.0036 (theo). We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 209 GeV. We present distributions of event shape observables and their moments at each energy and compare with QCD Monte Carlo models. From the event shape distributions we extract the strong coupling alpha_s and test its evolution with energy scale. The results are consistent with the running of alpha_s expected from QCD. Combining all data, the value of alpha_s(M_Z) is determined to be alpha_s(M_Z) = 0.1191 +- 0.0005 (stat.) +- 0.0010 (expt.) +- 0.0011 (hadr.) +- 0.0044 (theo.). The energy evolution of the moments is also used to determine a value of alpha_s with slightly larger errors: alpha_s(M_Z) = 0.1223 +- 0.0005 (stat.) +- 0.0014 (expt.) +- 0.0016 (hadr.) +0.0054 -0.0036 (theo.).
Published: 2004

34. Study of Bose-Einstein Correlations in $e^{+}e^{-}\to W^{+}W^{-}$ events at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Klein, K., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Kress, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: Condensed Matter::Quantum Gases, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Bose-Einstein correlation between like-sign charged-particle pairs in e+e- -> W+W- events recorded with the OPAL detector at LEP at centre-of-mass energies between 183 GeV and 209 GeV are studied. Recently proposed methods which allow direct searches for correlations in the data via distributions of test variables are used to investigate the presence of correlations between hadrons originating from different W bosons in W+W- -> qqqq events. Within the statistics of the data sample no evidence for inter-WW Bose-Einstein correlations is obtained. The data are also compared with predictions of a recent implementation of Bose-Einstein correlation effects in the Monte Carlo model PYTHIA. Bose-Einstein correlation between like-sign charged-particle pairs in e+e- -> W+W- events recorded with the OPAL detector at LEP at centre-of-mass energies between 183 GeV and 209 GeV are studied. Recently proposed methods which allow direct searches for correlations in the data via distributions of test variables are used to investigate the presence of correlations between hadrons originating from different W bosons in W+W- -> qqqq events. Within the statistics of the data sample no evidence for inter-WW Bose-Einstein correlations is obtained. The data are also compared with predictions of a recent implementation of Bose-Einstein correlation effects in the Monte Carlo model PYTHIA.
Published: 2004

35. Constraints on Anomalous Quartic Gauge Boson Couplings from $\nu\overline{\nu}\gamma\gamma$ and $q\overline{q}\gamma\gamma$ events at LEP 2

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at centre-of-mass energies up to 209 GeV. Event selections identify vv gamma gamma and qq gamma gamma events in which the two photons are reconstructed within the detector acceptance. The cross-section for the process e+e- -> qq gamma gamma is measured. Averaging over all energies, the ratio of the observed e+e- -> qq gamma gamma cross-section to the Standard Model expectation is R(data/SM) = 0.92 +- 0.07 +- 0.04 where the errors represent the statistical and systematic uncertainties respectively. The vv gamma gamma and qq gamma gamma data are used to constrain possible anomalous W+W- gamma gamma and ZZ gamma gamma couplings. Combining with previous OPAL results from the W+W- gamma final state, the 95% confidence level limits on the anomalous coupling parameters aoz, acz, aow and acw are found to be: -0.007 GeV^-2 < aoz/Lambda^2 < 0.023 GeV^-2 -0.029 GeV^-2 < acz/Lambda^2 < 0.029 GeV^-2 -0.020 GeV^-2 < aow/Lambda^2 < 0.020 GeV^-2 -0.052 GeV^-2 < acw/Lambda^2 < 0.037 GeV^-2 where Lamdba is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented. Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at centre-of-mass energies up to 209 GeV. Event selections identify vv gamma gamma and qq gamma gamma events in which the two photons are reconstructed within the detector acceptance. The cross-section for the process e+e- -> qq gamma gamma is measured. Averaging over all energies, the ratio of the observed e+e- -> qq gamma gamma cross-section to the Standard Model expectation is R(data/SM) = 0.92 +- 0.07 +- 0.04 where the errors represent the statistical and systematic uncertainties respectively. The vv gamma gamma and qq gamma gamma data are used to constrain possible anomalous W+W- gamma gamma and ZZ gamma gamma couplings. Combining with previous OPAL results from the W+W- gamma final state, the 95% confidence level limits on the anomalous coupling parameters aoz, acz, aow and acw are found to be: -0.007 GeV^-2 < aoz/Lambda^2 < 0.023 GeV^-2 -0.029 GeV^-2 < acz/Lambda^2 < 0.029 GeV^-2 -0.020 GeV^-2 < aow/Lambda^2 < 0.020 GeV^-2 -0.052 GeV^-2 < acw/Lambda^2 < 0.037 GeV^-2 where Lamdba is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented.
Published: 2004

36. Constraints on anomalous quartic gauge boson couplings from $v$ $\bar{v}$ $\gamma$ $\gamma$ and $q$ $\bar{q}$ gamma gamma events at LEP-2

Author: Abbiendi, G., Ainsley, C., Azuelos, G., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G. D., Bailey, I., Landsman, H., Lanske, D., Layter, J. G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S. L., Loebinger, F. K., Lu, J., Barberio, E., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A. J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R. A., Barillari, T., Meijers, F., Menges, W., Merritt, F. S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Moed, S., Barlow, R. J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H. A., Nisius, R., O'Neale, S. W., Oh, A., Batley, R. J., Oreglia, M. J., Orito, S., Pahl, C., Pasztor, G., Pater, J. R., Pilcher, J. E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Bechtle, P., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J. M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Behnke, T., Sarkisyan, E. K. G., Schaile, A. D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Scott, W. G., Seuster, R., Bell, Kenneth Watson, Shears, T. G., Shen, B. C., Sherwood, P., Skuja, A., Smith, A. M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Bell, P. J., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M. A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Akesson, P. F., Bella, G., Tsur, E., Turner-Watson, M. F., Ueda, I., Ujvari, B., Vollmer, C. F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Bellerive, A., Ward, C. P., Ward, D. R., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Wilson, G. W., Wilson, J. A., Benelli, G., Wolf, G., Wyatt, T. R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, OPAL Collaboration, Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Alexander, G., Brown, Robert M., Buesser, K., Burckhart, H. J., Campana, S., Carnegie, R. K., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, D. G., Ciocca, C., Allison, John, Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E. A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Amaral, P., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Anagnostou, G., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Anderson, K. J., Gruwe, M., Gunther, P. O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harel, A., Hauschild, M., Hawkes, C. M., Hawkings, R., Asai, S., Hemingway, R. J., Herten, G., Heuer, R. D., Hill, J. C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Axen, D., Junk, T. R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., and Kluth, S.
Subjects: pair production [photon], channel cross section, OPAL, (4gauge boson) [coupling], +quark+antiquark+2photon%22">electron positron --> quark antiquark 2photon, Astrophysics::High Energy Astrophysical Phenomena, 130-209 GeV-cms, pair production [neutrino], constraint [parametrization], CERN LEP Stor, annihilation [electron positron], pair production [quark], colliding beams [electron positron], +neutrino+antineutrino+2photon%22">electron positron --> neutrino antineutrino 2photon, High Energy Physics::Experiment, ddc:530, experimental results
Abstract: Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at centre-of-mass energies up to 209 GeV. Event selections identify vv gamma gamma and qq gamma gamma events in which the two photons are reconstructed within the detector acceptance. The cross-section for the process e+e- -> qq gamma gamma is measured. Averaging over all energies, the ratio of the observed e+e- -> qq gamma gamma cross-section to the Standard Model expectation is R(data/SM) = 0.92 +- 0.07 +- 0.04 where the errors represent the statistical and systematic uncertainties respectively. The vv gamma gamma and qq gamma gamma data are used to constrain possible anomalous W+W- gamma gamma and ZZ gamma gamma couplings. Combining with previous OPAL results from the W+W- gamma final state, the 95% confidence level limits on the anomalous coupling parameters aoz, acz, aow and acw are found to be: -0.007 GeV^-2 < aoz/Lambda^2 < 0.023 GeV^-2 -0.029 GeV^-2 < acz/Lambda^2 < 0.029 GeV^-2 -0.020 GeV^-2 < aow/Lambda^2 < 0.020 GeV^-2 -0.052 GeV^-2 < acw/Lambda^2 < 0.037 GeV^-2 where Lamdba is the energy scale of the new physics. Limits found when allowing two or more parameters to vary are also presented.
Published: 2004

37. A study of W+W- gamma events at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, G.P.SIROLI, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, and L. ZIVKOVIC
Subjects: High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract: A study of W+W- events accomanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W bosons and an isolated photon are selected from 681 pb^-1 of data recorded at 180 GeV < sqrt(s) < 209 GeV. For these data , 187 W+W- candidates are selected with photon energies greater than 2.5 GeV. The selected events are used to determine the W+ W- gamma cross section at five values of sqrt(s). The results are consistent with the Standard Model expectation. These data provide constraints on the related O(alpha) systematic uncertainties on the measurement of the W boson mass at LEP. Finally, the data are used to derive 95% C.L. upper limits on possible anomalous contributions to the W+ W- gamma gamma and W+ W- Z0 gamma vertices. A study of W+W- events accomanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W bosons and an isolated photon are selected from 681 pb^-1 of data recorded at 180 GeV < sqrt(s) < 209 GeV. For these data, 187 W+W- candidates are selected with photon energies greater than 2.5 GeV. The selected events are used to determine the W+ W- gamma cross section at five values of sqrt(s). The results are consistent with the Standard Model expectation. These data provide constraints on the related O(alpha) systematic uncertainties on the measurement of the W boson mass at LEP. Finally, the data are used to derive 95% C.L. upper limits on possible anomalous contributions to the W+ W- gamma gamma and W+ W- Z0 gamma vertices. A study of W + W − events accompanied by hard photon radiation, E γ >2.5 GeV, produced in e + e − collisions at LEP is presented. Events consistent with being two on-shell W-bosons and an isolated photon are selected from 681 pb −1 of data recorded at 180 GeV < s
Published: 2004

38. Measurement of the Strange Spectral Function in Hadronic tau Decays

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Menke, S., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, C.CIOCCA, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, and OPAL Collaboration
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Monte Carlo method, Hadron, Nuclear Theory, FOS: Physical sciences, Strangeness, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, Invariant mass, High Energy Physics::Experiment, Spectral function, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Lepton
Abstract: Tau lepton decays with open strangeness in the final state are measured with the OPAL detector at LEP to determine the strange hadronic spectral function of the tau lepton. The decays T- ->(Kpi)-nu tau, (Kpipi)-nu tau and (Kpipipi) -nu tau with final states consisting of neutral and charged kaons and pions have been studied. The invariant mass distributions of 93.4% of these final states have been experimentally determined. Monte Carlo simulations have been used for the remaining 6.6% and for the strange final states including eta mesons. The reconstructed strange final states, corrected for resolution effects and detection efficiencies, yield the strange spectral function of the tau lepton. The moments of the spectral function and the ration of strange to non-strange moments, which are important input parameters for theoretical analysis, are determined. Furthermore, the branching fractions B(tau- -> K-pi0nu tau)=(0.471+-0.064stat+_0.022sys)% and B(tau- -> K-pi+pi-nu tau)=(0.415+-0.059stat+-0.031sys)% have been measured., 32 pages, 18 figures, Submitted to Euro. Phys.J. C
Published: 2004
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39. Experimental studies of unbiased gluon jets from $\mathrm{e^+ e^−}$ annihilations using the jet boost algorithm

Author: Abbiendi, G., Ainsley, C., Axen, D., Kawamoto, T., Keeler, R. K., Kellogg, R. G., Kennedy, B. W., Kim, D. H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Azuelos, G., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G. D., Landsman, H., Bailey, I., Lanske, D., Layter, J. G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S. L., Loebinger, F. K., Lu, J., Barberio, E., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A. J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W. J., McKenna, J., Barlow, R. J., McMahon, T. J., McPherson, R. A., Meijers, F., Menges, W., Merritt, F. S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D. J., Batley, R. J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H. A., Nisius, R., O'Neale, S. W., Bechtle, P., Oh, A., Okpara, A., Oreglia, M. J., Orito, S., Pahl, C., Pasztor, G., Pater, J. R., Patrick, G. N., Pilcher, J. E., Pinfold, J., Behnke, T., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Bell, Kenneth Watson, Roney, J. M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E. K. G., Schaile, A. D., Schaile, O., Scharff-Hansen, P., Bell, P. J., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W. G., Seuster, R., Shears, T. G., Shen, B. C., Sherwood, P., Akesson, P. F., Bella, G., Siroli, G., Skuja, A., Smith, A. M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Bellerive, A., Tarem, S., Tasevsky, M., Taylor, R. J., Teuscher, R., Thomson, M. A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Benelli, G., Tsur, E., Turner-Watson, M. F., Ueda, I., Ujvari, B., Vollmer, C. F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Bethke, S., Waller, D., Ward, C. P., Ward, D. R., Warsinsky, M., Watkins, P. M., Watson, A. T., Watson, N. K., Wells, P. S., Wengler, T., Wermes, N., Biebel, O., Wetterling, D., Wilson, G. W., Wilson, J. A., Wolf, G., Wyatt, T. R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, OPAL Collaboration, Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Alexander, G., Brown, Robert M., Buesser, K., Burckhart, H. J., Campana, S., Carnegie, R. K., Caron, B., Carter, A. A., Carter, J. R., Chang, C. Y., Charlton, David G., Allison, John, Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E. A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Amaral, P., Duckeck, G., Duerdoth, I. P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Anagnostou, G., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Anderson, K. J., Grunhaus, J., Gruwe, M., Gunther, P. O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G. G., Harder, K., Harel, A., Harin-Dirac, M., Arcelli, S., Hauschild, M., Hawkes, C. M., Hawkings, R., Hemingway, R. J., Hensel, C., Herten, G., Heuer, R. D., Hill, J. C., Hoffman, Kara Dion, Horvath, D., Asai, S., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T. R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., and Kawagoe, K.
Subjects: perturbation theory [quantum chromodynamics], jet [quark], OPAL, hadronic decay [Z0], Astrophysics::High Energy Astrophysical Phenomena, spectrum [multiplicity], bibliography, particle identification [jet], CERN LEP Stor, annihilation [electron positron], energy [jet], +quark+antiquark+gluon%22">Z0 --> quark antiquark gluon, transverse momentum [jet], fragmentation function, approx. 91 GeV-cms, dipole [color], moment [multiplicity], multiplicity [charged particle], jet [gluon], colliding beams [electron positron], High Energy Physics::Experiment, ddc:530, Nuclear Experiment, experimental results
Abstract: We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z0 decays observed with the OPAL detector at the LEP e+e- collider at CERN. First, we test the boost algorithm through studies with Herwig Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two non-trivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not well described for jet energies below about 14 GeV.
Published: 2004

40. Determination of the LEP Beam Energy using Radiative Fermion-pair Events, 2004

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brown, Robert M., Burckhart, H.J., Campana, S., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rossi, A.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract: We present a determination of the LEP beam energy using "radiative return" fermion-pair events recorded at centre-of-mass energies from 183 GeV to 209 GeV. We find no evidence of a disagreement between the OPAL data and the LEP Energy Workings Group's standard calibration. Including the energy- averaged 11 MeV uncertainty in the standard determination, the beam energy we obtain from the OPAL data is higher than that obtained from the LEP calibration by 0+-34(stat.)+-27(syst.)MeV We present a determination of the LEP beam energy using radiative return fermion-pair events recorded at centre-of-mass energies from 183 GeV to 209 GeV. We find no evidence of a disagreement between the OPAL data and the LEP Energy Workings Group's standard calibration. Including the energy- averaged 11 MeV uncertainty in the standard determination, the beam energy we obtain from the OPAL data is higher than that obtained from the LEP calibration by 0+-34(stat.)+-27(syst.)MeV We present a determination of the LEP beam energy using “radiative return” fermion-pair events recorded at centre-of-mass energies from 183 to 209 GeV. We find no evidence of a disagreement between the OPAL data and the LEP Energy Working Group's standard calibration. Including the energy-averaged 11 MeV uncertainty in the standard determination, the beam energy we obtain from the OPAL data is higher than that obtained from the LEP calibration by 0±34(stat.)±27(syst.)MeV .
Published: 2004

41. Search for anomalous production of di-lepton events with missing transverse momentum in <tex>e(^{+})e(^{-})$</tex> collisions at root √s=183-209 GeV

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, OPAL Collaboration, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, G.P.SIROLI, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, and L. ZIVKOVIC
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), Pair production, 0103 physical sciences, Higgs boson, High Energy Physics::Experiment, Production (computer science), 010306 general physics, Engineering (miscellaneous), Event (particle physics), Particle Physics - Experiment, Lepton, Boson
Abstract: In total 1317 di-lepton events with significant missing transverse momentum were identified in a total data sample of 680 pb-1 collected at e+e- centre-of-mass energies ranging from 183 GeV to 209 GeV. The number of di-lepton events, the dependence on centre-of-mass energy, and the event properties are consistent with expectations from Standard Model processes, predominantly W+W- production with both W bosons decaying leptonically. This topology is also an experimental signature for the pair production of new particles that decay to a charged lepton accompanied by one or more invisible particles. No evidence for new phenomena is apparent. Upper limits are presented on the production cross-section multiplied by the relevant branching ratio squared for sleptons, leptonically decaying charginos and charged Higgs bosons. Mass limits are also given., Comment: 42 pages, 15 figures, Submitted to Eur. Phys. J. C
Published: 2004

42. Multi-photon events with large missing energy in e+e- collisions at sqrt(s) = 192-209 GeV

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Meyer, Niels T., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schorner-Sadenius, T., Schroder, Matthias, Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, C.CIOCCA, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, and L. ZIVKOVIC
Subjects: High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectation from the Standard Model process e+e- -> nu nu gamma gamma(gamma). No evidence for new physics contributions to this final state is observed. Upper limits on sigma (e+e- -> XX) BR^2(X -> Ygamma) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 fb to 60 fb, while for the special case of massless Y the range is 20 fb to 40 fb. The limits apply to pair production of excited neutrions (X=nu^*,Y=nu), to neutralino production (X=~chi^0_2, Y=~chi^0_1) and to supersymmetric models in which X=~chi^0_1 and Y=~G is a light gravitino. Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e- collisions at centre-of-mass energies in the range 192 - 209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectation from the Standard Model process e+e- -> nu nu gamma gamma(gamma). No evidence for new physics contributions to this final state is observed. Upper limits on sigma (e+e- -> XX) BR^2(X -> Ygamma) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 fb to 60 fb, while for the special case of massless Y the range is 20 fb to 40 fb. The limits apply to pair production of excited neutrions (X=nu^*,Y=nu), to neutralino production (X=~chi^0_2, Y=~chi^0_1) and to supersymmetric models in which X=~chi^0_1 and Y=~G is a light gravitino. Events with a final state consisting of two or more photons and large missing transverse energy have been observed in e+e− collisions at centre-of-mass energies in the range 192–209 GeV using the OPAL detector at LEP. Cross-section measurements are performed within the kinematic acceptance of the selection and compared with the expectations from the Standard Model process e+e−→νν¯γγ(γ) . No evidence for new physics contributions to this final state is observed. Upper limits on σ(e+e−→XX)⋅BR2(X→Yγ) are derived for the case of stable and invisible Y. In the case of massive Y the combined limits obtained from all the data range from 10 to 60 fb, while for the special case of massless Y the range is 20 to 40 fb. The limits apply to pair production of excited neutrinos ( X=ν*,Y=ν ), to neutralino production ( X=χ˜20,Y=χ˜10 ) and to supersymmetric models in which X=χ˜10 and Y=G˜ is a light gravitino.
Published: 2004

43. A study of charm production in beauty decays with the OPAL detector at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, C.A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, G.P.SIROLI, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, and L. ZIVKOVIC
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Using an inclusive method, BR(b -> D\bar{D}X) has been measured in hadronic Z^0 decays with the OPAL detector at LEP. The impact parameter significance of tracks opposite tagged b-jets is used to differentiate b -> D\bar{D}X decays from other decays. Using this result, the average number of charm and anti-charm quarks produced per beauty quark decay, n_c, is determined. Using an inclusive method, BR(b -> D\bar{D}X) has been measured in hadronic Z^0 decays with the OPAL detector at LEP. The impact parameter significance of tracks opposite tagged b-jets is used to differentiate b -> D\bar{D}X decays from other decays. Using this result, the average number of charm and anti-charm quarks produced per beauty quark decay, n_c, is determined.
Published: 2004

44. Flavour independent search for Higgs bosons decaying into hadronic final states in e+e- collisions

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barillari, T., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Bohme, J., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Ciocca, C., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harel, A., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herten, G., Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Landsman, H., Lanske, D., Layter, J.G., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, A., Ludwig, J., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McKenna, J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., ONeale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract: A search for the Higgsstrahlung process e+e- -> hZ is described, where the neutral Higgs boson h is assumed to decay into hadronic final states. In order to be sensitive to a broad range of models, the search is performed independent of the flavour content of the Higgs boson decay. The analysis is based on e+e- collision data collected by the OPAL detector at energies between 192 GeV and 209 GeV. The search does not reveal any significant excess over the Standard Model background prediction. Results are combined with previous searches at energies around 91 GeV and at 189 GeV. A limit is set on the product of the cross-section and the hadronic branching ration of the Higgs boson, as a function of the Higgs boson mass. Assuming the hZ coupling predicted by the Standard Model, and a Higgs boson decaying only into hadronic final states, a lower bound of 104 GeV/c2 is set on the mass at the 95% confidence level. A search for the Higgsstrahlung process e+e- -> hZ is described, where the neutral Higgs boson h is assumed to decay into hadronic final states. In order to be sensitive to a broad range of models, the search is performed independent of the flavour content of the Higgs boson decay. The analysis is based on e+e- collision data collected by the OPAL detector at energies between 192 GeV and 209 GeV. The search does not reveal any significant excess over the Standard Model background prediction. Results are combined with previous searches at energies around 91 GeV and at 189 GeV. A limit is set on the product of the cross-section and the hadronic branching ration of the Higgs boson, as a function of the Higgs boson mass. Assuming the hZ coupling predicted by the Standard Model, and a Higgs boson decaying only into hadronic final states, a lower bound of 104 GeV/c2 is set on the mass at the 95% confidence level. A search for the Higgsstrahlung process e+e−→hZ is described, where the neutral Higgs boson h is assumed to decay into hadronic final states. In order to be sensitive to a broad range of models, the search is performed independent of the flavour content of the Higgs boson decay. The analysis is based on e+e− collision data collected by the OPAL detector at energies between 192 and 209 GeV. The search does not reveal any significant excess over the Standard Model background prediction. Results are combined with previous searches at energies around 91 and at 189 GeV. A limit is set on the product of the cross-section and the hadronic branching ratio of the Higgs boson, as a function of the Higgs boson mass. Assuming the hZ coupling predicted by the Standard Model, and a Higgs boson decaying only into hadronic final states, a lower bound of 104 GeV/c2 is set on the mass at the 95% confidence level.
Published: 2003

45. Experimental studies of unbiased gluon jets from $e^{+}e^{-}$ annihilations using the jet boost algorithm

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Warsinsky, M., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, P.CAPILUPPI, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, A.M.ROSSI, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, G.P.SIROLI, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, and L. ZIVKOVIC
Subjects: Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract: We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z0 decays observed with the OPAL detector at the LEP e+e- collider at CERN. First, we test the boost algorithm through studies with Herwig Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two non-trivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not well described for jet energies below about 14 GeV. We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z0 decays observed with the OPAL detector at the LEP e+e- collider at CERN. First, we test the boost algorithm through studies with Herwig Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two non-trivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not well described for jet energies below about 14 GeV. We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z0 decays observed with the OPAL detector at the LEP e+e- collider at CERN. First, we test the boost algorithm through studies with Herwig Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two non-trivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not well described for jet energies below about 14 GeV. We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e- annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z0 decays observed with the OPAL detector at the LEP e+e- collider at CERN. First, we test the boost algorithm through studies with Herwig Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two non-trivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not well described for jet energies below about 14 GeV.
Published: 2003

46. Study of Z Pair Production and Anomalous Couplings in $e^+ e^-$ Collisions at $\sqrt{s}$ between 190 GeV and 209 GeV

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Warsinsky, M., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, and OPAL Collaboration
Subjects: Quark, Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Hadron, High Energy Physics::Phenomenology, FOS: Physical sciences, Observable, State (functional analysis), 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pair production, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Event (particle physics), Particle Physics - Experiment, Lepton
Abstract: A study of Z-boson pair production in e+e- annihilation at center-of-mass energies between 190 GeV and 209 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nn), quark and lepton pairs, (qql+l-, qqnn) and only hadrons (qqqq) are considered. In all states with at least one Z boson decaying hadronically, lifetime, lepton and event-shape tags are used to separate bb pairs from qq final state. Limits on anomalous ZZgamma and ZZZ couplings are derived from the measured cross sections and from event kinematics using an optimal observable method. Limits on low scale gravity with large dimensions are derived from the cross sections and their dependence on polar angle., 34 pages, 10 figures, Submitted to Eur. Phys. J
Published: 2003

47. Tests of models of color reconnection and a search for glueballs using gluon jets with a rapidity gap

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., Zivkovic, Lidija, G.ABBIENDI, C.AINSLEY, P.F.°AKESSON, G.ALEXANDER, J.ALLISON, P.AMARAL, G.ANAGNOSTOU, K.J.ANDERSON, S.ARCELLI, S.ASAI, D.AXEN, G.AZUELOS, I.BAILEY, E.BARBERIO, T.BARILLARI, R.J.BARLOW, R.J.BATLEY, P.BECHTLE, T.BEHNKE, K.W.BELL, P.J.BELL, G.BELLA, A.BELLERIVE, G.BENELLI, S.BETHKE, O.BIEBEL, O.BOERIU, P.BOCK, M.BOUTEMEUR, S.BRAIBANT, L.BRIGLIADORI, R.M.BROWN, K.BUESSER, H.J.BURCKHART, S.CAMPANA, R.K.CARNEGIE, A.A.CARTER, J.R.CARTER, C.Y.CHANG, D.G.CHARLTON, A.CSILLING, M.CUFFIANI, S.DADO, A.DE ROECK, E.A.DE WOLF, K.DESCH, B.DIENES, M.DONKERS, J.DUBBERT, E.DUCHOVNI, G.DUCKECK, I.P.DUERDOTH, E.ETZION, F.FABBRI, L.FELD, P.FERRARI, F.FIEDLER, I.FLECK, M.FORD, A.FREY, P.GAGNON, J.W.GARY, G.GAYCKEN, C.GEICH-GIMBEL, G.GIACOMELLI, P.GIACOMELLI, M.GIUNTA, J.GOLDBERG, E.GROSS, J.GRUNHAUS, M.GRUW´E, P.O.G¨UNTHER, A.GUPTA, C.HAJDU, M.HAMANN, G.G.HANSON, A.HAREL, M.HAUSCHILD, C.M.HAWKES, R.HAWKINGS, R.J.HEMINGWAY, G.HERTEN, R.D.HEUER, J.C.HILL, K.HOFFMAN, D.HORV´ATH, P. IGO-KEMENES, K. ISHII, H. JEREMIE, P. JOVANOVIC, T.R. JUNK, N.KANAYA, J.KANZAKI, D.KARLEN, K.KAWAGOE, T.KAWAMOTO, R.K.KEELER, R.G.KELLOGG, B.W.KENNEDY, S.KLUTH, T.KOBAYASHI, M.KOBEL, S.KOMAMIYA, T.KR¨AMER, P.KRIEGER, J. VON KROGH, K.KRUGER, T.KUHL, M.KUPPER, G.D. LAFFERTY, H. LANDSMAN, D. LANSKE, J.G. LAYTER, D. LELLOUCH, J. LETTSO, L. LEVINSON, J. LILLICH, S.L. LLOYD, F.K. LOEBINGER, J. LU, A. LUDWIG, J. LUDWIG, W.MADER, S.MARCELLINI, A.J.MARTIN, G.MASETTI, T.MASHIMO, P.M¨ATTIGM, J.MCKENNA, R.A.MCPHERSON, F.MEIJERS, W.MENGES, F.S.MERRITT, H.MES, N.MEYER, A.MICHELINI, S.MIHARA, G.MIKENBERG, D.J.MILLER, S.MOED, W.MOHR, T.MORI, A.MUTTER, K.NAGAI, I.NAKAMURA, H.NANJO, H.A.NEAL, R.NISIUS, S.W.O’NEALE, A.OH, M.J.OREGLIA, S.ORITO, C.PAHL, G.P´ASZTOR, J.R.PATER, J.E.PILCHER, J.PINFOLD, D.E.PLANE, B.POLI, O.POOTH, M.PRZYBYCIE´N, A.QUADT, K.RABBERTZ, C.REMBSER, P.RENKEL, J.M.RONEY, Y.ROZEN, K.RUNGE, K. SACHS, T. SAEKI, E.K.G. SARKISYAN, A.D. SCHAILE, O. SCHAILE, P. SCHARFF-HANSEN, J. SCHIECK, T. SCH¨ORNER-SADENIUS, M. SCHR¨ODER, M. SCHUMACHER, W.G. SCOTT, R. SEUSTER, T.G. SHEARS, B.C. SHEN, P. SHERWOOD, G.P.SIROLI, A. SKUJA, A.M. SMITH, R. SOBIE, S. S¨OLDNER-REMBOLD, F. SPANO, A. STAHL, D. STROM, R. STR¨OHMER, S.TAREM, M.TASEVSKY, R.TEUSCHER, M.A.THOMSON, E.TORRENCE, D.TOYA, P.TRAN, I.TRIGGER, Z.TR´OCS´ANYI, E.TSUR, M.F.TURNER-WATSON, I.UEDA, B.UJV´ARI, C.F.VOLLMER, P.VANNEREM, R.V´ERTESI, M.VERZOCCHI, H.VOSS, J.VOSSEBELD, C.P.WARD, D.R.WARD, P.M.WATKINS, A.T.WATSON, N.K.WATSON, P.S.WELLS, T.WENGLER, N.WERMES, G.W.WILSON, J.A.WILSON, G.WOLF, T.R.WYATT, S.YAMASHITA, D. ZER-ZION, L. ZIVKOVIC, and OPAL Collaboration
Subjects: Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Monte Carlo method, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Gluon, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Cutoff, Rapidity, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: Gluon jets with a mean energy of 22 GeV and purity of 95% are selected from hadronic Z0 decay events produced in e+e- annihilations. A subsample of these jets is identified which exhibits a large gap in the rapidity distribution of particles within the jet. After imposing the requirement of a rapidity gap, the gluon jet purity is 86%. These jets are observed to demonstrate a high degree of sensitivity to the presence of color reconnection, i.e. higher order QCD processes affecting the underlying color structure. We use our data to test three QCD models which include a simulation of color reconnection: one in the Ariadne Monte Carlo, one in the Herwig Monte Carlo, and the other by Rathsman in the Pythia Monte Carlo. We find the Rathsman and Ariadne color reconnection models can describe our gluon jet measurements only if very large values are used for the cutoff parameters which serve to terminate the parton showers, and that the description of inclusive Z0 data is significantly degraded in this case. We conclude that color reconnection as implemented by these two models is disfavored. The signal from the Herwig color reconnection model is less clear and we do not obtain a definite conclusion concerning this model. In a separate study, we follow recent theoretical suggestions and search for glueball-like objects in the leading part of the gluon jets. No clear evidence is observed for these objects., Comment: 42 pages, 18 figures
Published: 2003

48. Search for pair-produced leptoquarks in $e^{+}e^{-}$ interactions at $\sqrt{s}\simeq$ 189 -209 GeV

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Boeriu, O., Bock, P., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Nanjo, H., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: Physics, Particle physics, Luminosity (scattering theory), Photon, Physics and Astronomy (miscellaneous), Branching fraction, Scalar (mathematics), High Energy Physics::Phenomenology, Fermion, Pair production, Leptoquark, High Energy Physics::Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract: A search for pair-produced leptoquarks is performed using e+e- collision events collected by the OPAL detector at LEP at centre-of-mass energies between 189 and 209 GeV. The data sample corresponds to a total integrated luminosity of 596 pb^-1. The leptoquarks are assumed to be produced via couplings to the photon and the Z0. For a given search channel only leptoquark decays involving a single lepton generation are considered. No evidence for leptoquark pair production is observed. Lower limits on masses for scalar and vector leptoquarks are calculated. The results improve most of the LEP limits derived from previous searches for the pair production process by 10-25 GeV, depending on the leptoquark quantum numbers. A search for pair-produced leptoquarks is performed using e+e- collision events collected by the OPAL detector at LEP at centre-of-mass energies between 189 and 209 GeV. The data sample corresponds to a total integrated luminosity of 596 pb^-1. The leptoquarks are assumed to be produced via couplings to the photon and the Z0. For a given search channel only leptoquark decays involving a single lepton generation are considered. No evidence for leptoquark pair production is observed. Lower limits on masses for scalar and vector leptoquarks are calculated. The results improve most of the LEP limits derived from previous searches for the pair production process by 10-25 GeV, depending on the leptoquark quantum numbers.
Published: 2003

49. Test of non-commutative QED in the process $e^{+}e^{-} \to \gamma \gamma$ at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Bloodworth, I.J., Boeriu, O., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Csilling, A., Cuffiani, M., Dado, S., De Roeck, A., De Wolf, E.A., Desch, K., Dienes, B., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Elfgren, E., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Homer, R.J., Horvath, D., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Komamiya, S., Kormos, Laura L., Kramer, T., Kress, T., Krieger, P., von Krogh, J., Kruger, K., Kuhl, T., Kupper, M., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Lettso, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Martin, A.J., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Sachs, K., Saeki, T., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharff-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Tricoli, A., Trigger, I., Trocsanyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vollmer, C.F., Vannerem, P., Vertesi, R., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zer-Zion, D., and Zivkovic, Lidija
Subjects: High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Non-communicative QED would lead to deviations from the Standard Model depending on a new energy scale $\Delta_{NC}$ and a unique direction in space defined by two angles $\eta$ and $\xi$. Here in this analysis $\eta$ is defined as the angle between the unique direction and the rotation axis of the earth. The predictions of such a theory for the process $e^{+} e^{-} \to \gamma \gamma$ are evalued for the specific orientation of the OPAL detector and compared to the measurements. Distributions of the polar and azimuthal scattering angles are used to extract limits on the energy scale $\Delta_{NC}$ depending on the model parameter $\eta$. At the 95% confidence level $\Delta_{NC}$ is found to be larger than 141 GeV for all $\eta$ and $\xi$. It is shown that the time dependence of the total cross-section could be used to determine the model parameter $\xi$ if there were a detectable signal. These are the first limits obtained on non-commutative QED from an $e^{+} e^{-}$ collider experiment. Non-commutative QED would lead to deviations from the Standard Model depending on a new energy scale Λ NC and a unique direction in space defined by two angles η and ξ . In this analysis, η is defined as the angle between the unique direction and the rotation axis of the earth. The predictions of a tree level calculation for the process e + e − → γγ are evaluated for the specific orientation of the OPAL detector and compared to the measurements. Distributions of the polar and azimuthal photon angles are used to extract limits on the energy scale Λ NC depending on the model parameter η . It is shown that the time dependence of the total cross-section could be used to determine the model parameter ξ if there were a detectable signal. This is the first experimental study of non-commutative QED at an e + e − collider. Non-commutative QED would lead to deviations from the Standard Model depending on a new energy scale Lambda_NC and a unique direction in space defined by two angles eta and xi. Here in this analysis eta is defined as the angle between the unique direction and the rotation axis of the earth. The predictions of such a theory for the process e+e- -> gamma gamma are evaluated for the specific orientation of the OPAL detector and compared to the measurements. Distributions of the polar and azimuthal scattering angles are used to extract limits on the energy scale Lambda_NC depending on the model parameter eta. At the 95% confidence level Lambda_NC is found to be larger than 141 GeV for all eta and xi. It is shown that the time dependence of the total cross-section could be used to determine the model parameter xi if there were a detectable signal. These are the first limits obtained on non-commutative QED from an e+e- collider experiment.
Published: 2003

50. Decay-mode independent searches for new scalar bosons with the OPAL detector at LEP

Author: Abbiendi, G., Ainsley, C., Akesson, P.F., Alexander, G., Allison, John, Amaral, P., Anagnostou, G., Anderson, K.J., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Bailey, I., Barberio, E., Barlow, R.J., Batley, R.J., Bechtle, P., Behnke, T., Bell, Kenneth Watson, Bell, P.J., Bella, G., Bellerive, A., Benelli, G., Bethke, S., Biebel, O., Bloodworth, I.J., Boeriu, O., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Robert M., Buesser, K., Burckhart, H.J., Cammin, J., Campana, S., Carnegie, R.K., Caron, B., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Cohen, I., Csilling, A., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Dallison, S., De Roeck, A., De Wolf, E.A., Desch, K., Donkers, M., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Elfgren, E., Etzion, E., Fabbri, F., Feld, L., Ferrari, P., Fiedler, F., Fleck, I., Ford, M., Frey, A., Furtjes, A., Gagnon, P., Gary, John William, Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Giunta, Marina, Goldberg, J., Gross, E., Grunhaus, J., Gruwe, M., Gunther, P.O., Gupta, A., Hajdu, C., Hamann, M., Hanson, G.G., Harder, K., Harel, A., Harin-Dirac, M., Hauschild, M., Hauschildt, J., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Hensel, C., Herten, G., Heuer, R.D., Hill, J.C., Hoffman, Kara Dion, Homer, R.J., Horvath, D., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Ishii, K., Jeremie, H., Jovanovic, P., Junk, T.R., Kanaya, N., Kanzaki, J., Karapetian, G., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Kim, D.H., Klein, K., Klier, A., Klute, M., Kluth, S., Kobayashi, T., Kobel, M., Kokott, T.P., Komamiya, S., Kormos, Laura L., Kowalewski, Robert V., Kramer, T., Kress, T., Krieger, P., von Krogh, J., Krop, D., Kupper, M., Kyberd, P., Lafferty, G.D., Landsman, H., Lanske, D., Layter, J.G., Leins, A., Lellouch, D., Letts, J., Levinson, L., Lillich, J., Lloyd, S.L., Loebinger, F.K., Lu, J., Ludwig, J., Macpherson, A., Mader, W., Marcellini, S., Marchant, T.E., Martin, A.J., Martin, J.P., Masetti, G., Mashimo, T., Mattig, Peter, McDonald, W.J., McKenna, J., McMahon, T.J., McPherson, R.A., Meijers, F., Mendez-Lorenzo, P., Menges, W., Merritt, F.S., Mes, H., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Moed, S., Mohr, W., Mori, T., Mutter, A., Nagai, K., Nakamura, I., Neal, H.A., Nisius, R., O'Neale, S.W., Oh, A., Okpara, A., Oreglia, M.J., Orito, S., Pahl, C., Pasztor, G., Pater, J.R., Patrick, G.N., Pilcher, J.E., Pinfold, J., Plane, David E., Poli, B., Polok, J., Pooth, O., Przybycien, M., Quadt, A., Rabbertz, K., Rembser, C., Renkel, P., Rick, H., Roney, J.M., Rosati, S., Rozen, Y., Runge, K., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sarkisyan, E.K.G., Schaile, A.D., Schaile, O., Scharoe-Hansen, P., Schieck, J., Schoerner-Sadenius, Thomas, Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G., Skuja, A., Smith, A.M., Sobie, R., Soldner-Rembold, S., Spagnolo, S., Spano, F., Stahl, A., Stephens, K., Strom, David M., Strohmer, R., Tarem, S., Tasevsky, M., Taylor, R.J., Teuscher, R., Thomson, M.A., Torrence, E., Toya, D., Tran, P., Trefzger, T., Tricoli, A., Trigger, I., Trocsnyi, Z., Tsur, E., Turner-Watson, M.F., Ueda, I., Ujvari, B., Vachon, B., Vollmer, C.F., Vannerem, P., Verzocchi, M., Voss, H., Vossebeld, J., Waller, D., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wengler, T., Wermes, N., Wetterling, D., Wilson, G.W., Wilson, J.A., Wolf, G., Wyatt, T.R., Yamashita, S., Zacek, V., Zer-Zion, D., Zivkovic, Lidija, OPAL Collaboration, G., Abbiendi, C., Ainsley, P. F., Akesson, G., Alexander, J., Allison, P., Amaral, G., Anagnostou, K. J., Anderson, S., Arcelli, S., Asai, D., Axen, G., Azuelo, I., Bailey, E., Barberio, R. J., Barlow, R. J., Batley, P., Bechtle, T., Behnke, K. W., Bell, P. J., Bell, G., Bella, A., Bellerive, G., Benelli, S., Bethke, O., Biebel, I. J., Bloodworth, O., Boeriu, P., Bock, D., Bonacorsi, M., Boutemeur, S., Braibant, L., Brigliadori, R. M., Brown, K., Buesser, H. J., Burckhart, J., Cammin, S., Campana, R. K., Carnegie, B., Caron, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, I., Cohen, A., Csilling, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, A., De Roeck, E. A., De, K., Desch, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, E., Elfgren, E., Etzion, F., Fabbri, L., Feld, P., Ferrari, F., Fiedler, I., Fleck, M., Ford, A., Frey, A., Furtje, P., Gagnon, J. W., Gary, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, M., Giunta, J., Goldberg, E., Gro, J., Grunhau, M., Gruwe, P. O., Gunther, A., Gupta, C., Hajdu, M., Hamann, G. G., Hanson, K., Harder, A., Harel, M., Harin Dirac, M., Hauschild, J., Hauschildt, R., Hawking, R. J., Hemingway, C., Hensel, G., Herten, R. D., Heuer, J. C., Hill, K., Hoffman, R. J., Homer, D., Horvath, R., Howard, P., Huntemeyer, P., Igo Kemene, K., Ishii, H., Jeremie, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, G., Karapetian, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, K., Klein, A., Klier, M., Klute, S., Kluth, T., Kobayashi, M., Kobel, T. P., Kokott, S., Komamiya, L., Kormo, R. V., Kowalewski, T., Kramer, T., Kre, P., Krieger, J., von Krogh, D., Krop, M., Kupper, P., Kyberd, G. D., Lafferty, H., Landsman, D., Lanske, J. G., Layter, A., Lein, D., Lellouch, J., Lett, L., Levinson, J., Lillich, S. L., Lloyd, F. K., Loebinger, J., Lu, J., Ludwig, A., Macpherson, W., Mader, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Masetti, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenz, W., Menge, F. S., Merritt, H., Me, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, S., Moed, W., Mohr, T., Mori, A., Mutter, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, A., Oh, A., Okpara, M. J., Oreglia, S., Orito, C., Pahl, G., Pasztor, J. R., Pater, G. N., Patrick, J. E., Pilcher, J., Pinfold, D. E., Plane, B., Poli, J., Polok, O., Pooth, M., Przybycien, A., Quadt, K., Rabbertz, C., Rembser, P., Renkel, H., Rick, J. M., Roney, S., Rosati, Y., Rozen, K., Runge, D. R., Rust, K., Sach, T., Saeki, O., Sahr, E. K., G., A. D., Schaile, O., Schaile, P., Scharff Hansen, J., Schieck, T., Schoerner Sadeniu, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, G., Siroli, A., Skuja, A. M., Smith, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, F., Spano, A., Stahl, K., Stephen, D., Strom, R., Strohmer, S., Tarem, M., Tasevsky, R. J., Taylor, R., Teuscher, M. A., Thomson, E., Torrence, D., Toya, P., Tran, T., Trefzger, A., Tricoli, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, B., Ujvari, B., Vachon, C. F., Vollmer, P., Vannerem, M., Verzocchi, H., Vo, J., Vossebeld, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, N. K., Watson, P. S., Well, T., Wengler, N., Werme, D., Wetterling, G. W., Wilson, J. A., Wilson, G., Wolf, T. R., Wyatt, S., Yamashita, V., Zacek, D., Zer Zion, and L., Zivkovic
Subjects: Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), Scalar (mathematics), Hadron, FOS: Physical sciences, Scalar boson, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Recoil, Mass spectrum, High Energy Physics::Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Lepton, Boson
Abstract: This paper describes topological searches for neutral scalar bosons S0 produced in association with a Z0 boson via the Bjorken process e+e- -> S0Z0 at centre-of-mass energies of 91 GeV and 183-209 GeV. These searches are based on studies of the recoil mass spectrum of Z0 -> e+e- and mu+mu- events on a search for S0Z0 with Z0 -> nunu bar and S0 -> e+e- or photons. They cover the decays of the S0 into an arbitrary combination of hadrons, leptons, photons and invisible particles as well as the possibility that it might be stable. No indication for a signal is found in the data and upper limits on the cross section of the Bjorken process are calculated. Cross-section limits are given in terms of a scale factor k with respect to the Standrad Model cross section for the Higgs-strahlung process e+e- -> H0smZ0. These results can be interpreted in general scenarios independently of the decay modes of the S0. The examples considered here are the production of a single new scalar particle with a decay width smaller than the detector mass resolution, and for the first time, two scenarios with continuous mass distributions, due to a single very broad state or several states close in mass., 36 pages, 14 figures
Published: 2003

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