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1. VLT/NACO adaptive optics imaging of the TY CrA system - A fourth stellar component candidate detected

Author: G. Chauvin, A.-M. Lagrange, H. Beust, T. Fusco, D. Mouillet, F. Lacombe, P. Pujet, G. Rousset, E. Gendron, J.-M. Conan, D. Bauduin, D. Rouan, W. Brandner, R. Lenzen, N. Hubin, M. Hartung, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris
Subjects: Physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, System a, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Component (UML), Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Adaptive optics, Astrophysics::Galaxy Astrophysics
Abstract: We report the detection of a possible subsolar mass companion to the triple young system TY CrA using the NACO instrument at the VLT UT4 during its commissioning. Assuming for TY CrA a distance similar to that of the close binary system HD 176386, the photometric spectral type of this fourth stellar component candidate is consistent with an ~M4 star. We discuss the dynamical stability of this possible quadruple system as well as the possible location of dusty particles inside or outside the system., 4 pages, 2 figures postscript
Published: 2003
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2. Search for the Standard Model Higgs boson at LEP in the year 2000

Author: Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. CuevasMaestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. DeMin, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. van Dam, P. van den Boeck, W. van Doninck, W.K. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zumerle, G. Zupan, M.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Searches for the Standard Model Higgs boson have been performed in the data collected by the DELPHI experiment at LEP in the year 2000 at centre-of-mass energies between 200 and 209 GeV corresponding to a total integrated luminosity of 224 pb-1. No evidence for a Higgs signal is observed in the kinematically accessible mass range, and a 95% CL lower mass limit of 114.3 GeV/c2 is set, to be compared with an expected median limit of 113.5 GeV/c2 for these data. © 2001 Elsevier Science B.V.
Published: 2001

3. Search for neutralino pair production at √s = 189 GeV

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Y. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strandberg, J. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, P. Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for pair-production of neutralinos at a LEP centre-of-mass energy of 189 GeV gave no evidence for a signal. This limits the neutralino production cross-section and excludes regions in the parameter space of the Minimal Supersymmetric Standard Model (MSSM).
Published: 2001

4. Measurement of the semileptonic b branching fractions and average b mixing parameter in Z decays

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Asman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Mundim, L.M. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, P. Van den Boeck, W. Van Doninck, W.K. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zumerle, G. Zupan, M.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The semileptonic branching fractions for primary and cascade b decays BR(b → l-), BR(b → c → l+) and BR(b → c̄ → l- were measured in hadronic Z decays collected by the DELPHI experiment at LEP. The sample was enriched in b decays using the lifetime information and various techniques were used to separate leptons from direct or cascade b decays. By fitting the momentum spectra of di-leptons in opposite jets, the average b mixing parameter x̄ was also extracted. The following results have been obtained: (equation presented).
Published: 2001

5. Update of the search for supersymmetric particles in scenarios with gravitino LSP and sleptons NLSP

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andring, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bloch, D. Bloma, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Gimenez, M.V.C. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikovi, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstr, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Caballero, I.G. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jaloch, P. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lams, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martii Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarri, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiv, R. Palacios, J. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralt, L. Perepelitsa, V. Pernicka, M. Perrott, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Piment, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarci, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarova, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, P. Van Den Boeck, W. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venusa, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zumerle, G. Zupan, M. DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: An update of the search for sleptons, neutralinos and charginos in the context of scenarios where the lightest supersymmetric particle is the gravitino and the next-to-lightest supersymmetric particle is a slepton, is presented, together with the update of the search for heavy stable charged particles in light gravitino scenarios and Minimal Supersymmetric Standard Models. Data collected in 1999 with the DELPHI detector at centre-of-mass energies around 192, 196, 200 and 202 GeV were analysed. No evidence for the production of these supersymmetric particles was found. Hence, new mass limits were derived at 95% confidence level. © 2001 Published by Elsevier Science B.V.
Published: 2001

6. Measurement of the mass and width of the W boson in e+e- collisions at √s = 189 GeV

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Bellunato, T.F. Belokopytov, Yu. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. DeAngelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martii Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, Th.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Peralta, L. Perepelitsa, V. Pernicka, M. Perrott, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Piment, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadj, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarci, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. Van Dam, P. Van Den Boeck, W. Van Doninck, W.K. Van Eldik, J.V. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venusa, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlena, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zumerle, G. Zupan, M. DELPHI Collaboration
Abstract: A measurement of the W mass and width has been performed by the DELPHI Collaboration using the data collected during 1998. The data sample has an integrated luminosity of 155 pb-1 and an average centre-of-mass energy of 188.6 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W+W- → lvlqq′ and W+W- → qq′qq′ channels. The W mass result for the 1998 data set is MW = 80.387 ± 0.087(stat) ± 0.034(syst) ± 0.017(LEP) ± 0.035(FSI) GeV/c2, where FSI represents the uncertainty due to final state interaction effects in the qq′qq′ channel, and LEP represents that arising from the knowledge of the beam energy of the accelerator. Combining this result with those previously published by the DELPHI Collaboration gives the result MW = 80.359 ± 0.074(stat) ± 0.032(syst) ± 0.017(LEP) ± 0.033(FSI) GeV/c2. The combined value for the W width is λW = 2.266 ± 0.176(stat)± 0.056(syst)± 0.052(FSI) GeV/c2. © 2001 Elsevier Science B.V. All rights reserved.
Published: 2001

7. Search for sleptons in e+e- collisions at √s = 183 to 189 GeV

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. Di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Geralis, T. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Y. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. van Dam, P. van den Boeck, W. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Data taken by the DELPHI experiment at centre-of-mass energies of 183 GeV and 189 GeV with a total integrated luminosity of 212 pb-1 have been used to search for the supersymmetric partners of the electrons, muons, and taus in the context of the Minimal Supersymmetric Standard Model (MSSM). The decay topologies searched for were the direct decay (ℓ̃ → ℓx̃), producing acoplanar lepton pairs plus missing energy, and the cascade decay (ℓ → ℓx̃02 → ℓγx̃01), producing acoplanar lepton and photon pairs plus missing energy. The observed number of events is in agreement with Standard Model predictions. The 95% CL excluded mass limits for selectrons, smuons and staus are mẽ ≤ 87 GeV/c2, mμ̃ ≤ 80 GeV/c2 and mτ̃ 75 GeV/c2, respectively, for values of μ=-200 GeV/c2 and tanβ=1.5.
Published: 2001

8. Measurement of Vcb from the decay process B̄0 → D*+ℓ-v̄

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. da Silva, W. della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Y. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Dam, P. van den Boeck, W. van Doninck, W.K. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M.
Abstract: A new precise measurement of |Vcb| and of the branching ratio BR(B̄0 → D*+ℓ-v̄ℓ) has been performed using a sample of about 5000 semileptonic decays B̄0 → D*+ℓ-v̄ℓ, selected by the DELPHI detector at LEP I by tagging the soft pion from D*+ → D0π+. The results are: Vcb = (39.0 ± 1.5 (stat.)-2.6 +2.5 (syst. exp.) ± 1.3 (syst. th.)) × 10-3, BR(B̄0 → D*+ℓ-v̄ℓ) = (4.70 ± 0.13 (stat.)-0.31 +0.36 (syst. exp.))%. The analytic dependencies of the differential cross-section and of the Isgur-Wise form factor as functions of the variable w = vB0 · vD* have also been obtained by unfolding the experimental resolution. © 2001 Published by Elsevier Science B.V.
Published: 2001

9. Single intermediate vector boson production in e+e- collisions at √s = 183 and 189 gev

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anashkin, E. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Anjos, N. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Bellunato, T.F. Benvenuti, A.C. Berat, C. Berggren, M. Berntzon, L. Bertrand, D. Besancon, M. Besson, N. Bilenky, M.S. Bloch, D. Blom, H.M. Bol, L. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buschmann, P. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collin, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Croix, J. Crosetti, G. Cuevas Maestro, J. Czellar, S. D'Hondt, J. Dalmau, J. Davenport, M. da Silva, W. della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Doroba, K. Dracos, M. Drees, J. Dris, M. Eigen, G. Ekelof, T. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Feindt, M. Fernandez, J. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gaviller, P. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Haug, S. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hertz, O. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Y. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kucharczyk, M. Kurowska, J. Lamsa, J.W. Laugier, J.-P. Leder, G. Ledroit, F. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Merle, E. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moenig, K. Monge, M.R. Montenegro, J. Moraes, D. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mundim, L.M. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Niezurawski, P. Nikolenko, M. Nomokono, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Perepelitsa, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Poireau, V. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salmi, L. Salt, J. Sampsonidis, D. Sannino, M. Savoy-Navarro, A. Schwanda, C. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Sette, G. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Stanescu, C. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Dam, P. van den Boeck, W. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, P. Zumerle, G. Zupan, M.
Subjects: High Energy Physics::Experiment
Abstract: The cross sections for the production of single charged and neutral intermediate vector bosons were measured using integrated luminosities of 52 pb-1 and 154 pb-1 collected by the experiment at centre-of-mass energies of 182.6 GeV and 188.6 GeV, respectively. The cross sections for the reactions were determined in limited kinematic regions. The results found are in agreement with the Standard Model predictions for these channels. © 2001 Elsevier Science B.V.
Published: 2001

10. Search for heavy stable and long-lived particles in e(+)e(-) collisions at root s=189 GeV

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, NC Benvenuti, AFC Berat, C Berggren, M Bertrand, D Besancon, M Bigi, M Bilenky, MS and Bizouard, MA Bloch, D Blom, HM Bonesini, M 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, B Bracko, M Branchini, P and Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M and Camporesi, T Canale, V Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Chapkin, M Charpentier, P Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Santo, ME Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Ghodbane, N Gil, I Glege, F and Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P and Caballero, IG Gopal, G Gorn, L Gouz, Y Cracco, V and Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K and Guy, J Haag, C Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Hansen, J Harris, FJ Hedberg, V and Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ and Hoorelbeke, S Houlden, M Hrubec, J Huber, M Huet, K and Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C and Juillot, P Jungermann, L Kapusta, F Karafasoulis, K and Katsanevas, S Katsoufis, EC Keranen, R Kernel, G and Kersevan, BP Khokhlov, Y Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E and Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, 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 Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT and Miagkov, A Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K and Monge, MR Moraes, D Moreau, X Morettini, P Morton, G and Mueller, U Muenich, K Mulders, M Mulet-Marquis, C and Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T and Naraghi, F Nassiakou, M Navarria, FL Navas, S Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS and Niezurawski, P Nikolenko, M Nomokonov, V Nygren, A and Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G and Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R and Paiva, R Palacios, J Palka, H Papadopouloum, TD and Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A and Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M and Perrotta, A Petridou, C Petrolini, A Phillips, HT and Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME and Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Rebecchi, P Redaelli, NG and Regler, M Rehn, J Reid, D Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G and Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, M Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Solovianov, O and Sopczak, A Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K and Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F and Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A Tome, B and Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML and Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W and Van Doninck, WK Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W and Verbeure, F Verdier, P Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS and Voulgaris, G Vrba, V Wahlen, H Walck, C Washbrook, AJ and Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J Yushchenko, O Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI and Zintchenko, A Zoller, P Zucchelli, GC Zumerle, G DELPHI Collaboration
Abstract: A search for stable and long-lived heavy charged particles was performed using the data taken by the DELPHI experiment at an energy of 189 GeV. The Cherenkov light detected in the Ring Imaging Cherenkov Detector and the ionisation loss measured in the Time Projection Chamber were used to identify heavy particles passing through the detector. No evidence for the production of such particles has been found, therefore exclusion limits at 95% confidence level were derived on the masses of left and right handed smuons and staus. The results were combined with previous DELPHI searches in this channel. Including previous DELPHI results, masses of left (right) handed stable smuons and staus can be excluded between 2 GeV/c(2) and 88 (87.5) GeV/c(2) at 95% CL. (C) 2000 Elsevier Science B.V. All rights reserved.
Published: 2000

11. A precise measurement of the τ polarisation at LEP-1

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Asman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. de Brabandere, S. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Polycarpo, E. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, P. Van den Boeck, W. Van Doninck, W.K. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zucchelli, G.C. Zumerle, G.
Abstract: The τ polarisation has been studied with the e+e- → τ+τ- data collected by the DELPHI detector at LEP in 1993, 1994 and 1995 around the Z resonance firstly through the exclusive decay channels evv̄, μvvμ, πv, ρv, and a1v and secondly with an inclusive hadronic analysis which benefits from a higher efficiency and a better systematic precision. The results have been combined with those previously published on 1990 to 1992 DELPHI data, to produce results which reflect the full LEP-1 statistics. The fit of the τ polarisation dependence on the production angle yielded the polarisation parameters Aτ = 0.1359 ± 0.0096 and Ae = 0.1382 ± 0.0116. From these results the ratio of the vector and axial-vector effective couplings v̄τ/āτ = 0.0683 ± 0.0048 and v̄e/āe = 0.0694 ± 0.0058 have been derived, compatible with e-τ universality. With the assumption of lepton universality, the ratio of vector to axial-vector effective couplings for leptons v̄ι/āι = 0.0687 ± 0.0037 was obtained, implying a value of the effective weak mixing angle sin2 θlepteff= 0.23282 ± 0.00092.
Published: 2000

12. Determination of vertical bar V-ub vertical bar/vertical bar V-cb vertical bar with DELPHI at LEP

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, M Benvenuti, AC Berat, C Berggren, M and Bertrand, D Besancon, M Bigi, M Bilenky, MS and Bizouard, MA Bloch, D Blom, HM Bonesini, M 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 Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M and Camporesi, T Canale, V Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Chapkin, M Charpentier, P Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C Dolbeau, J Doroba, K and Dracos, M Drees, J Dris, M Duperrin, A Durand, JD and Eigen, G Ekelof, T Ekspong, G Ellert, M Elsing, M and Engel, MP Santo, ME Fanourakis, G Fassouliotis, D and Fayot, J Feindt, M Ferrer, A Ferrer-Ribas, E Ferro, F and Fichet, S Firestone, A Flagmeyer, U Foeth, H and Fokitis, E Fontanelli, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C and Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D and Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B and Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G and Gorn, L Gouz, Y Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Haag, C Hahn, F and Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J and Harris, FJ Hedberg, V Heising, S Hernandez, JJ and Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E and Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J and Huber, M Huet, K Hughes, GJ Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C Juillot, P Jungermann, L and Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kernel, G Kersevan, BP Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ and Klapp, O Klein, H Kluit, P Kokkinias, P and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH and Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A and Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J Mastroyiannopoulos, N Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M and McCubbin, M McKay, R McNulty, R McPherson, G Meroni, C and Meyer, WT Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K and Monge, MR Moraes, D Moreau, X Morettini, P Morton, G and Mueller, U Muenich, K Mulders, M Mulet-Marquis, C and Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T and Naraghi, F Nassiakou, M Navarria, FL Navas, S Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS and Niezurawski, P Nikolenko, M Nomokonov, V Nygren, A and Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G and Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R and Paiva, R Palacios, J Palka, H Papadopoulou, T and Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U and Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L and Pernicka, M Perrotta, A Petridou, C Petrolini, A and Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T and Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S and Rahmani, H Rames, J Ratoff, PN Read, AL Rebecchi, P and Redaelli, NG Regler, M Rehn, J Reid, D Reinhardt, R and Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G and Ripp-Baudot, I Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Sokolov, A and Solovianov, O Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A and Tegenfeldt, F Terranova, F Thomas, I Timmermans, J and Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A and Tome, B Tonazzo, A Tortora, L Tortosa, P and Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Turluer, ML Tyapkin, IA Tzamarias, S and Ullaland, O Uvarov, V Valenti, G Vallazza, E Vander Velde, C Van Dam, P Van den Boeck, W Van Doninck, WK Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I and Vegni, G Ventura, L Venus, W Verbeure, F Verdier, P and Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V and Wahlen, H Walck, C Washbrook, AJ Weiser, C Wicke, D and Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G and Yi, J Yushchenko, O Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A and Zoller, P Zucchelli, GC Zumerle, G DELPHI Collaboration
Abstract: {The ratio of the CKM quark-mixing matrix elements \textbackslash{}V-ub\textbackslash{}/\textbackslash{}V-cb\textbackslash{ } has been measured using B hadron semileptonic decays. The analysis uses the reconstructed mass M-X of the secondary hadronic system produced in association with an identified lepton. Since B --> X(u)l (v) over bar transitions are characterised by hadronic masses below those of the D mesons produced in B --> X(c)l (v) over bar transitions, events with a reconstructed value of M-X significantly below the D mass are selected. Further signal enrichments are obtained using the topology of reconstructed decays and hadron identification. A fit to the numbers of decays in the b --> u enriched and depleted samples with M-X above and below 1.6 GeV/c(2) and to the shapes of the lepton energy distribution in the B rest frame gives \textbackslash{}V-ub\textbackslash{}/\textbackslash{}V-cb\textbackslash{ } = 0.103 (+0.011)(-0.012) (stat.) +/- 0.016(syst.) +/- 0.010(model) and, correspondingly, a charmless semileptonic B decay branching fraction of BR(B --> X(u)l (v) over bar)= (1.57 +/- 0.35 (stat.) +/- 0.48(syst.) +/- 0.27(model)) x 10(-3). (C) 2000 Published by Elsevier Science B.V. All rights reserved.}
Published: 2000

13. Update of the search for charginos nearly mass-degenerate with the lightest neutralino

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U and Amapane, N Amato, S Anassontzis, EG Andersson, P and Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y and Asman, B Augustin, JE Augustinus, A Baillon, P and Ballestrero, A Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A and Beilliere, P Belokopytov, Y Benekos, NC Benvenuti, AC and Berat, C Berggren, M Bertrand, D Besancon, M Bigi, M and Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M and Boonekamp, M Booth, PSL Borgland, AW Borisov, G and Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Bracko, M and Branchini, P Brenner, RA Bruckman, P Brunet, JM and Bugge, L Buran, T Buschbeck, B Buschmann, P Cabrera, S and Caccia, M Calvi, M Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Charpentier, P Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Santo, ME Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G and Goncalves, P Caballero, IG Gopal, G Gorn, L Gouz, Y and Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G and Grzelak, K Guy, J Haag, C Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Hansen, J Harris, FJ Hauler, F Hedberg, V Heising, S Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO and Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M and Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Jeans, D Johansson, EK Jonsson, P and Joram, C Juillot, P Jungermann, L Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, P and Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ and Klapp, O Klein, H Kluit, P Kokkinias, P and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, 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 Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Pherson, GM Meroni, C Meyer, WT and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moraes, D and Moreau, X Morettini, P Morton, G Mueller, U Muenich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Nassiakou, M and Navarria, FL Navas, S Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M and Nomokonov, V Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J and Palka, H Papadopoulou, TD Pape, L Parkes, C Parodi, F and Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E and Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL and Rebecchi, P Redaelli, NG Regler, M Rehn, J Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J and Rinaudo, G Ripp-Baudot, I Rohne, O Romero, A and Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P and Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A and Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J and Sampsonidis, D Sannino, M Schwemling, P Schwering, B and Schwickerath, U Scuri, F Seager, P Sedykh, Y Segar, AM and Seibert, N Sekulin, R Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnov, N and Smirnova, O Smith, GR Sokolov, A Sopczak, A Sosnowski, R and Spassov, T Spiriti, E Squarcia, S Stanescu, C and Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M and Tabarelli, T Taffard, A Tchikilev, O Tegenfeldt, F and Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A Tome, B and Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML and Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W and Van Eldik, J Van Lysebetten, A van Remortal, N Van Vulpen, I and Vegni, G Ventura, L Venus, W Verbeure, F Verdier, P and Verlato, M Vertogradov, LS Verzi, V Vilanova, D and Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V and Wahlen, H Walck, C Washbrook, AJ Weiser, C Wicke, D and Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G and Yi, J Yushchenko, O Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A and Zoller, P Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to update the search for charginos nearly mass-degenerate with the lightest supersymmetric particle, which is assumed to be the lightest neutralino. Mass differences below Delta M = 3 GeV/c(2) are considered. No excess of events with respect to the Standard Model expectation has been observed, and exclusions in the plane of Delta M versus chargino mass are given. The new Delta M independent lower limit on the mass of the chargino is 62.4 GeV/c(2) in the higgsino scenario (which includes the gaugino mass unification scenario), if all sfermions are heavier than the lightest chargino. In the approximation of large sfermion masses the limit is 59.8 GeV/c(2), independently of the field content. (C) 2000 Published by Elsevier Science B.V.
Published: 2000

14. Lambda(b) polarization in Z(0) decays at LEP

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U and Amapane, N Amato, S Anassontzis, EG Andersson, P and Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y and Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY and Barker, G Baroncelli, A Battaglia, M Baubillier, M and Becks, KH Begalli, M Behrmann, A Beilliere, P and Belokopytov, Y Benekos, NC Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bigi, M and Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M Bonivento, W Boonekamp, M Booth, PSL Borgland, AW and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M and Bracko, M Branchini, P Brenner, RA Bruckman, P and Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P and Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chierici, R Chliapnikov, P and Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC and Czellar, S Davenport, M Da Silva, W Della Ricca, G and Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H and Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, JD Eigen, G Ekelof, T and Ekspong, G Ellert, M Elsing, M Engel, JP Santo, ME and Fanourakis, G Fassouliotis, D Fayot, J Feindt, M and Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E Ferro, F and Fichet, S Firestone, A Flagmeyer, U Foeth, H and Fokitis, E Fontanelli, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C and Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D and Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B and Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G and Gorn, L Gouz, Y Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Hahn, F Hahn, S and Haider, S Hallgren, A Hamacher, K Hansen, J Harris, FJ Hedberg, V Heising, S Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO and Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M and Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Jeans, D Johansson, EK Jonsson, P and Joram, C Juillot, P Jungermann, L Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R and Kernel, G Kersevan, BP Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E and Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, 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 Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT and Miagkov, A Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K and Monge, MR Moreau, X Morettini, P Morton, G Mueller, U and Muenich, K Mulders, M Mulet-Marquis, C Muresan, R and Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F and Nassiakou, M Navarria, FL Navas, S Nawrocki, K Negri, P and Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P and Nikolenko, M Nomokonov, V Nygren, A Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K and Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Papageorgiou, K and Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A and Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M and Perrotta, A Petridou, C Petrolini, A Phillips, HT and Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME and Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rames, J Ratoff, PN Read, AL Rebecchi, P Redaelli, NG and Regler, M Rehn, J Reid, D Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G and Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnov, N Smirnova, O Smith, GR and Sopczak, A Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K and Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Taffard, A Tchikilev, O and Tegenfeldt, F Terranova, F Thomas, J Timmermans, J and Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A and Tome, B Tonazzo, A Tortora, L Tortosa, P and Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Turluer, ML Tyapkin, IA Tzamarias, S and Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P and Van den Broeck, W Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W and Verbeure, F Verlato, M Vertogradov, LS Verzi, V and Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS and Voulgaris, G Vrba, V Wahlen, H Walck, C Washbrook, AJ and Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J Yushchenko, O Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI and Zintchenko, A Zoller, P Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract: The longitudinal polarization of the Lambda(b) baryon is measured at the LEP e(+)e(-) collider by DELPHI. It is determined from the charged lepton and neutrino energy spectra in 249 +/- 19 Lambda(b) semileptonic decays reconstructed in approximate to 3.5 million hadronic Z(0) decays using Lambda(0)-lepton correlations. The measured polarization is: P-Lambda b = -0.49(-0.30)(+0.32)(stat.) +/- 0.17(syst.). (C) Elsevier Science B.V. All rights reserved.
Published: 2000

15. Search for supersymmetry with R-parity violating LLĒ couplings at √s = 183 GeV

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. da Silva, W. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, P. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwering, B. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Apeldoorn, G.W. van Dam, P. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Searches for pair production of supersymmctric particles in e+e- collision at centre-of-mass energy of 183 GeV have been performed on DELPHI data under the assumption that R-parity is not conserved. Only one R-parity violating coupling of λ type, which couples the sleptous to the leptons (LLĒ erm), is considered to be dominant at a time. Since in models with R-parity violation any supersymmetic particlr can be the lightest one, searches for charginos, neutralinos, sleptons and squarks have been perfomed both for direct R-parity violating decays and for indirect cascade decays. Morever, it is assumed that the strength of the R-parity violating couplings is such that the lifetimes can be neglected. The present study of supersymmetric particle pair production is used to exclude domains of the Minimal Supersymmetric Standard Model parameter space previously explored under the assumption of R-parity conservation.
Published: 2000

16. Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U and Amapane, N Amato, S Anassontzis, EG Andersson, P and Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y and Asman, B Augustin, JE Augustinus, A Baillon, P and Ballestrero, A Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A and Beilliere, P Belokopytov, Y Benekos, NC Benvenuti, AC and Berat, C Berggren, M Bertrand, D Besancon, M Bigi, M and Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M and Boonekamp, M Booth, PSL 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 Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M and Camporesi, T Canale, V Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Checchia, P Chelkov, GA Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cieslik, K Collins, P Contri, R Cortina, E Cosme, G and Cossutti, F Costa, M Crawley, HB Crennell, D Crepe, S and Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Nagelis, A De Boer, W De Clercq, C De Lotto, B De Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Santo, ME Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G and Goncalves, P Caballero, IG Gopal, G Gorn, L Gouz, Y and Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G and Grzelak, K Guy, J Haag, C Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Hansen, J Harris, FJ Hauler, F Hedberg, V Heising, S Hernandez, JJ Herquet, P and Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO and Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M and Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Jeans, D Johansson, EK Jonsson, P and Joram, C Juillot, P Jungermann, L Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R and Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ and Klapp, O Klein, H Kluit, P Kokkinias, P and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A and Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Garcia, SMI Masik, J and Matroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, F Mazzucato, M McCubbin, M McKay, R and McNulty, R McPherson, G Meroni, C Meyer, WT Migliore, E and Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moraes, D Moreau, X and Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F Nassiakou, M and Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M Nomokonov, V and Nygren, A Obraztsov, V Olshevaki, AG Onofre, A and Orava, R Orazi, G Osterberg, K Ouraou, A Oyanguren, A and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J and Palka, H Papadopoulou, TD Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T and Pegoraro, M Peralta, L Pernicka, M Perrotta, A Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M and Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J and Reid, D Reinertsen, P Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI and Rosinksy, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Seemann, F Segar, AM Seibert, N and Sekulin, R Shellard, RC Siebel, M Simard, L Simonetto, F and Sisakian, AN Smadja, G Smirnov, N Smirnova, O Smith, GR Sokolov, A Solovianov, O Sopczak, A Sosnowski, R and Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanic, S and Stanitzki, M Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F Terranova, F Thomas, J and Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S and Tomaradze, A Tome, B Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Turluer, ML Tyapkin, IA Tyapkin, P and Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G and Ventura, L Venus, W Verbeure, F Verdier, P Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V Wahlen, H and Walck, C Washbrook, AJ Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zintchenko, A Zoller, P and Zucchelli, GC Zumerle, G Beckmann, WOG DELPHI Collaboration
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: Production of Sigma(-) and Lambda(1520) in hadronic Z decays has been measured using the DELPHI detector at LEP. The Sigma(-) is directly reconstructed as a charged track in the DELPHI microvertex detector and is identified by its Sigma –> n pi decay leading to a kink between the Sigma(-) and pi-track. The reconstruction of the Lambda(1520) resonance relies strongly on the particle identification capabilities of the barrel Ring Imaging Cherenkov detector and on the ionisation loss measurement of the TPC. Inclusive production spectra are measured for both particles. The production rates are measured to be [NSigma-/N-Z(had)] = 0.081 +/- 0.002 +/- 0.010, [N-Lambda(1520)/N-Z(had)] = 0.029 +/- 0.005 +/- 0.005. The production rate of the Lambda(1520) suggests that a large fraction of the stable baryons descend from orbitally excited baryonic states. It is shown that the baryon production rates in Z decays follow a universal phenomenological law related to isospin, strangeness and mass of the particles. (C) 2000 Elsevier Science B.V. All rights reserved.
Published: 2000

17. Measurement of the B0s lifetime and study of B0s-B0s oscillations using Dsℓ events

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. CastilloGimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. CuevasMaestro, J. Czellar, S. Davenport, M. DaSilva, W. Deghorain, A. DellaRicca, G. Delpierre, P. Demaria, N. DeAngelis, A. DeBoer, W. DeClercq, C. DeLotto, B. DeMin, A. DePaula, L. Dijkstra, H. DiCiaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. EspiritoSanto, M. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. GonzalezCaballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. MartiiGarcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. VanApeldoorn, G.W. VanDam, P. VanDoninck, W.K. VanEldik, J. VanLysebetten, A. VanRemortel, N. VanVulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zucchelli, G.C. Zumerle, G.
Abstract: Lifetime and oscillations of B0s mesons have been studied in events with a large transverse momentum lepton and a Ds of opposite electric charge in the same hemisphere, selected from about, 3.6 million hadronic Z0 decays accumulated by DELPHI between 1992 and 1995. The B0s lifetime and the fractional width difference between the two physical B0s states have been found to be: τB0s = (1.42+0.14-0.13(stat.) ± 0.03(syst.)) ps ΔΓB0s/ΓB0s < 0.46 at the 95% C.L. In the latter result it has been assumed that τB0s = τB0d. Using the same sample, a limit on the mass difference between the physical B0s states has been set: ΔmB0s > 7.4 ps-1 at the 95% C.L. with a corresponding sensitivity equal to 8.1 ps-1.
Published: 2000

18. Search for supersymmetric particles in scenarios with a gravitino LSP and stau NLSP

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Asman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Costa, M. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Y. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Oyanguren, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinertsen, P. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, P. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Dam, P. van den Boeck, W. van Eldik, J. van Lysebetten, A. van Remortel, N. van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, P. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Sleptons, neutralinos and charginos were searched for in the context of scenarios where the lightest supersymmetric particle is the gravitino. It was assumed that the stau is the next-to-ligntest supersymmetric particle. Data collected with the DELPHI detector at a centre-of-mass energy near 189 GeV were analysed combining the methods developed in previous searches at lower energies. No evidence for the production of these supersymmetric particles was found. Hence, limits were derived at 95% confidence level.
Published: 2000

19. Hadronization properties of b quarks compared to light quarks in e(+)e(-)-> q(q)over-bar from 183 to 200 GeV

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Ballestrero, A Bambade, P and Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, NC Benvenuti, AC Berat, C Berggren, M and Bertrand, D Besancon, M Bigi, M Bilenky, MS and Bizouard, MA Bloch, D Blom, HM Bonesini, M Boonekamp, M and Booth, PSL Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I and Bozovic, I Bozzo, M Bracko, M Branchini, P Brenner, RA and Bruckman, P Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M and Camporesi, T Canale, V Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, M and Charpentier, P Checchia, P Chelkov, GA Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cieslik, K Collins, P Contri, R Cortina, E Cosme, G and Cossutti, F Costa, M Crawley, HB Crennell, D Crepe, S and Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Santo, ME Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Ghodbane, N Gil, I Glege, F and Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P and Caballero, IG Gopal, G Gorn, L Gouz, Y Gracco, V and Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K and Guy, J Haag, C Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Hansen, J Harris, FJ Hauler, F and Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C and Juillot, P Jungermann, L Kapusta, F Karafasoulis, K and Katsanevas, S Katsoufis, EC Keranen, R Kernel, G and Kersevan, BP Khokhlov, Y Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E and Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, 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 Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Miagkov, A and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moch, M Moeller, R Moenig, K Monge, MR and Moraes, D Moreau, X Morettini, P Morton, G Mueller, U and Muenich, K Mulders, M Mulet-Marquis, C Muresan, R and Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F and Nassiakou, M Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M and Nomokonov, V Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Oyanguren, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T and Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J and Reid, D Reinertsen, P Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Solovianov, O and Sopczak, A Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K and Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F and Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A Tome, B and Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML and Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W and Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I and Vegni, G Ventura, L Venus, W Verbeure, F Verdier, P and Verlato, M Vertogradov, LS Verzi, V Vilanova, D and Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V and Wahlen, H Walck, C Washbrook, AJ Weiser, C Wicke, D and Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G and Yi, J Yushchenko, O Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A and Zoller, P Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The DELPHI detector at LEP has collected 54 pb(-1) of data at a centre-of-mass energy around 183 GeV during 1997, 158 pb(-1) around 189 GeV during 1998, and 187 pb(-1) between 192 and 200 GeV during 1999. These data were used to measure the average charged particle multiplicity in e(+)e(-)->b (b) over bar events: (n)(b (b) over bar), and the difference delta(hl) between (n)(b (b) over bar) and the multiplicity, (n)(l (l) over bar), in generic light quark (u,d,s) events: delta(hl)(183 GeV) = 4.55 +/- 1.31(stat) +/- 0.73(syst), delta(hl)(189 GeV) = 4.43 +/- 0.85(stat) +/- 0.61(syst), delta(hl)(200 GeV) = 3.39 +/- 0.89(stat) +/- 1.01 (syst). This result is consistent with QCD predictions, while it is inconsistent with calculations assuming that the multiplicity accompanying the decay of a heavy quark is independent of the: mass of the quark itself. (C) 2000 Elsevier Science B.V. All rights reserved.
Published: 2000

20. Limits on the masses of supersymmetric particles at root s=189 GeV

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U and Amapane, N Amato, S Anassontzis, EG Andersson, P and Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y and Asman, B Augustin, JE Augustinus, A Baillon, P and Ballestrero, A Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A and Beilliere, P Belokopytov, Y Benekos, NC Benvenuti, AC and Berat, C Berggren, M Berntzon, L Bertrand, D Besancon, M and Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M Boonekamp, M Booth, PSL Borisov, G Bosio, C and Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Bracko, M and Branchini, P Brenner, RA Bruckman, P Brunet, JM Bugge, L and Buran, T Buschbeck, B Buschmann, P Cabrera, S and Caccia, H Calvi, M Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Charpentier, P Checchia, P Chelkov, GA Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cieslik, K Collins, P Contri, R Cortina, E Cosme, G and Cossutti, F Costa, M Crawley, HB Crennell, D Crosetti, G and Maestro, JC Czeller, S D'Hondt, J Dalmau, J and Davenport, M Da Silva, W Della Ricca, G Delpierre, P and Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L and Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M and Eigen, G Ekelof, T Ellert, M Elsing, M Engel, JP and Santo, ME Fanourakis, G Fassouliotis, D Feindt, M and Fernandez, J Ferrer, A Ferrer-Ribas, E Ferro, F and Firestone, A Flagmeyer, U Foeth, H Fokitis, E and Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, V Garcia, C Gaspar, C Gaspar, M and Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T and Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R and Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG and Gopal, G Gorn, L Gouz, Y Gracco, V Grahl, J and Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J and Haag, C Hahn, F Hahn, S Haider, S Hallgren, A and Hamacher, K Hansen, J Harris, FJ Hauler, F Hedberg, V and Heising, S Hernandez, JJ Herquet, P Herr, H Higon, E and Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M and Hrubec, J Huber, M Hughes, GJ Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C Juillot, P Jungermann, L and Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA Khovanski, NN Kiiskinen, A King, B Kinvig, A and Kjaer, NJ Klapp, O Kluit, P Kokkinias, P Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E and Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Laugier, JP Lauhakangas, R Leder, G and Ledroit, F Leinonen, L Leisos, A Leitner, R Lenzen, G and Lepeltier, V Lesiak, T Lethuillier, M Libby, J and Liebig, W Liko, D Lipniacka, A Lippi, I Loerstad, B and Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A and Malek, A Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Garcia, SM Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Merle, E Meroni, C Meyer, WT and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moraes, D and Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Mundim, LM Muresan, R and Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F and Nassiakou, M Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M and Nomokonov, V Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Oyanguren, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T and Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Poireau, V Pol, ME Polok, G and Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J and Ratoff, PN Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J Reid, D Reinertsen, P Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G and Ripp-Baudot, I Romero, A Ronchese, P Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Ruhlmann-Kleider, V and Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G and Salt, J Sampsonidis, D Sannino, M Savoy-Navarro, A and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Sette, G Shellard, RC Siebel, M Simard, L Simonetto, F and Sisakian, AN Smadja, G Smirnov, N Smirnova, O Smith, GR Sokolov, A Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Squarcia, S Stanescu, C Stanitzki, M and Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A and Tchikilev, O Tegenfeldt, F Terranova, F Timmermans, J and Tinti, N Tkatchev, LG Tobin, M Todorova, S Tome, B and Tonazzo, A Tortora, I Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML and Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Vander Velde, C Van Dam, P and Van den Boeck, W Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W and Verbeure, F Verdier, P Verlato, M Vertogradov, LS and Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS and Voulgaris, G Vrba, V Wahlen, H Washbrook, AJ Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M and Witek, M Wolf, G Yi, J Yushchenko, O Zalewska, A and Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI and Zintchenko, A Zoller, P Zumerle, G Zupan, M
Abstract: Searches for charginos, neutralinos and sleptons at LEP2 centre-of-mass energies from 130 GeV to 189 GeV have been used to set lower limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles within the MSSM framework. R-parity conservation has been assumed. The lightest neutralino was found to be heavier than GeV/c(2) independent of the m(0) value. The Lightest chargino, the second-to-lightest neutralino, the next-to-heaviest neutralino, the heaviest neutralino, the sneutrino and the right-handed selectron were found to be heavier than 62.4 GeV/c2, 62.4 GeV/c(2), 99.9 GeV/c(2), 116.0 GeV/c(2), 61.0 GeV/c(2), and 87.0 GeV/c(2), respectively. These limits do not depend on m(0) or M-2 and are Valid for 1 less than or equal to tan beta less than or equal to 40, in the mu region where the lightest neutralino is the LSP. If the sneutrino is heavier than the chargino the lightest neutralino has to be heavier than 32.4 GeV/c(2). The effects of mixings in the third family of sfermions on these limits are discussed. The confidence level of all limits given is 95%. (C) 2000 Published by Elsevier Science B.V.
Published: 2000

21. Determination of P(c → D*+) and BR(c → l+) at LEP 1

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. da Silva, W. Deghorain, A. Della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmanr, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwering, B. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Apeldoorn, G.W. Van Dam, P. Van Eldik, J. Van Lysebetten, A. Van Remortel, N. Van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Abstract: The probability P(c → D*+) that a charm quark fragments into a D*+ meson and the c → l+ semileptonic branching fraction were measured in Z0 decay into cc̄ events. From the analysis of 3.5 Million Z0 events collected from 1992 to 1995, a sample of charm meson decays with 81% cc̄ purity was selected. The product of the c → D*+ fragmentation probability times the D*+ → D0π+ branching fraction was measured to be: P(c → D*+) · BR(D*+ → D0π+) = 0.174 ± 0.010(stat) ± 0.004(syst). Using the world averaged value for BR(D*+ → D0π+), the fragmentation probability is inferred: P(c → D*+) = 0.255 ± 0.015(stat) ± 0.006(syst) ± 0.005(syst.BR). From the same sample, 1828 ± 51 identified leptons in the opposite hemisphere were selected. From this sample, the charm semileptonic branching fraction was measured to be: BR(c → l+) = 0.0958 ± 0.0042(stat) ± 0.0028(syst).
Published: 2000

22. W pair production cross-section and W branching fractions in e(+)e(-) interactions at 189 GeV

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Ballestrero, A Bambade, P and Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, NC Benvenuti, AC Berat, C Berggren, M and Bertrand, D Besancon, M Bilenky, MS Bizouard, MA and Bloch, D Blom, HM Bonesini, M Boonekamp, M Booth, PSL and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I and Bozzo, M Bracko, M Branchini, P Brenner, RA Bruckman, P and Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, P Charpentier, P and Checchia, P Chelkov, GA Chierici, R Chliapnikov, P and Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Costa, M and Crawley, HB Crennell, D Crepe, S Crosetti, G and Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M and Drees, J Dris, M Duperrin, A Durand, JD Eigen, G and Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP and Santo, ME Fanourakis, G Fassouliotis, D Fayot, J Feindt, M Fernandez, J Ferrer, A Ferrer-Ribas, E Ferro, F and Fichet, S Firestone, A Flagmeyer, U Foeth, H Fokitis, E and Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C Gaspar, M and Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T and Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B and Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G and Gorn, L Gouz, Y Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Haag, C Hahn, F and Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J and Harris, FJ Hauler, F Hedberg, V Heising, S and Hernandez, JJ Herquet, P Herr, H Heuser, JM Higon, E and Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J and Huber, M 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 Jonsson, P Joram, C Juillot, P Jungermann, L Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R and Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ and Klapp, O Klein, H Kluit, P Kokkinias, P and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH and Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A and Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Miagkov, A and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moch, M Moeller, R Moenig, K Monge, MR and Moraes, D Moreau, X Morettini, P Morton, G Mueller, U and Muenich, K Mulders, M Mulet-Marquis, C Muresan, R and Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F and Nassiakou, M Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M and Nomokonov, V Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Oyanguren, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T and Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J and Reid, D Reinertsen, P Reinhardt, R Renton, PB and Resvanis, LK Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Savoy-Navarro, A Schwemling, P Schwering, B and Schwickerath, U Scuri, F Seager, P Sedykh, Y Segar, AM and Seibert, N Sekulin, R Sette, G Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G and Smirnova, O Smith, GR Solovianov, O Sopczak, A and Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanitzki, M Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F Terranova, F Timmermans, J and Tinti, N Tkatchev, LG Tobin, M Todorova, S and Tomaradze, A Tome, B Tonazzo, A Tortora, L Tortosa, P and Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Turluer, ML Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W Van Doninck, WK Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G and Ventura, L Venus, W Verbeure, F Verdier, P Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V Wahlen, H and Walck, C Washbrook, AJ Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zintchenko, A Zoller, P and Zucchelli, GC Zumerle, G DELPHI Collaboration
Abstract: {The cross-section for the process e(+)e(-) --> W+ W- has been measured with the data sample collected by DELPHI at an average centre-of-mass energy of 189 GeV and corresponding to an integrated luminosity of 155 pb(-1). Based on the 2392 events selected as WW candidates, the cross-section for the doubly resonant process e(+)e(-) --> W+W- has been measured to be 15.83 +/- 0.38 (stat) +/- 0.20(syst)pb. The branching fractions of the W decay were also measured and found to be in good agreement with the Standard Model expectation. From these a value of the CKM mixing matrix element \textbackslash{} V-cs\textbackslash{} = 1.001 +/- 0.040 (stat) +/- 0.020(syst) was derived. (C) 2000 Elsevier Science B.V. All rights reserved.}
Published: 2000

23. Identified charged particles in quark and gluon jets

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Ballestrero, A. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertrand, D. Besancon, M. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Bracko, M. Branchini, P. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, Ph. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. Da Silva, W. Della Ricca, G. Delpierre, P. Demaria, N. De Angelis, A. De Boer, W. De Clercq, C. De Lotto, B. De Min, A. De Paula, L. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Espirito Santo, M. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Geralis, T. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Gris, P. Grosdidier, G. Grzelak, K. Guy, J. Haag, C. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hauler, F. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huber, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Jeans, D. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Jungermann, L. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kernel, G. Kersevan, B.P. Khokhlov, Yu. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liebig, W. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moraes, D. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neufeld, N. Nicolaidou, R. Nielsen, B.S. Niezurawski, P. Nikolenko, M. Nomokonov, V. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pavel, T. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Rehn, J. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Ripp-Baudot, I. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schwemling, Ph. Schwering, B. Schwickerath, U. Scuri, F. Seager, P. Sedykh, Y. Seemann, F. Segar, A.M. Seibert, N. Sekulin, R. Shellard, R.C. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Solovianov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Squarcia, S. Stanescu, C. Stanic, S. Stanitzki, M. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Taffard, A. Tchikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Tobin, M. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Tortosa, P. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Turluer, M.-L. Tyapkin, I.A. Tyapkin, P. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Van Dam, P. Van den Boeck, W. Van Eldik, J. Van Lysebetten, A. van Remortel, N. Van Vulpen, I. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verdier, P. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Washbrook, A.J. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zintchenko, A. Zoller, Ph. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A sample of 2.2 million hadronic Z decays, selected from the data recorded by the DELPHI detector at LEP during 1994-1995 was used for an improved measurement of inclusive distributions of π+ K+ and p and their antiparticles in gluon and quark jets. The production spectra of the individual identified particles were found to be softer in gluon jets compared to quark jets, with a higher multiplicity in gluon jets as observed for inclusive charged particles. A significant proton enhancement in gluon jets is observed indicating that baryon production proceeds directly from colour objects. The maxima, £*, of the ξ -distributions for kaons in gluon and quark jets are observed to be different.
Published: 2000

24. Measurement of A(FB)(b(b)over-bar) in hadronic Z decays using a jet charge technique

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Aldeweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Belous, K Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM and Bonesini, M Bonivento, W Boonekamp, M Booth, PSL and Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I and Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Chapkin, M Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chierici, R Chliapnikov, P and Chochula, P Chorowicz, V Chudoba, J Collins, P Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S and Damgaard, G Davenport, M Da Silva, W 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 Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Erzen, B Santo, ME Falk, E and Fanourakis, G Fassouliotis, D Fayot, J Feindt, M Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E 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, EN Gele, D and Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B and Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Grahl, J and Graziani, E Green, C Grimm, HJ Gris, P Grosdidier, G and Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Harris, FJ Hedberg, V and Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL and Heuser, JM Higon, E Holmgren, SO Holt, PJ and Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kersevan, BP Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Koratzinos, M and Kostioukhine, V Kourkoumelis, C Kauznetsov, O Krammer, M and Kreuter, C Kriznic, E Krstic, J Krumstein, Z Kubinec, P and Kucewicz, W Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I and Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazik, J Mazzucato, F Mazzucato, M McCubbin, M and McKay, R McNulty, R McPherson, G Meroni, C Meyer, WT and Migliore, E Mirabito, L Mjoernmark, U Moa, T Moch, M and Moeller, R Moenig, K Monge, MR Moreau, X Morettini, P and Morton, G Mueller, U Muenich, K Mulders, M and Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B Myatt, G and Myklebust, T Naraghi, F Navarria, FL Navas, S and Nawrocki, K Negri, P Nemecek, S Neufeld, N Neumeister, N and Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M and Peralta, L Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E and Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN Read, AL and Rebecchi, P Redaelli, NG Regler, M Reid, D Reinhardt, R and Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Simard, L and Simonetto, F Sisakian, AN Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Sopczak, A Sosnowski, R and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S Stevenson, K and Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M and Szeptycka, M Tabarelli, T Tegenfeldt, F Terranova, F and Thomas, J Tilquin, A Timmermans, J Tinti, N Tkatchev, LG and Todorova, S Toet, DZ Tome, B Tonazzo, A Tortora, L and Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J and Van Lysebetten, A Van Vulpen, I Vassilopoulos, N Vegni, G and Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E and Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V and Wahlen, H Walck, C Weiser, C Wicke, D Wickens, JH and Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zucchelli, GC and Zumerle, G DELPHI Collaboration
Abstract: The bb forward-backward asymmetry has been determined from the average charge how measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992 - 1995. The measurement is performed in an enriched b (b) over bar sample selected using an impact parameter tag and results in the following values for the bl; forward-backward asymmetry: A(FB)(b (b) over bar) (89.55 GeV) = 0.068 +/- 0.016 (stat.) +/- 0.0013(syst.) A(FB)(b (b) over bar)(91.26 GeV) = 0.0982 +/- 0.0047(stat.) +/- 0.0016(syst.) A(FB)(b (b) over bar)(92.94 GeV) = 0.123 +/- 0.016 (stat.) +/- 0.0027(syst.) The b (b) over bar charge separation required for this analysis is directly measured in the b tagged sample, while the other charge separations are obtained from a fragmentation model precisely calibrated to data. The effective weak mixing angle is deduced from the measurement to be: sin(2)theta(eff)1 = 0.23186 +/- 0.00063.
Published: 1999

25. Measurement of inclusive rho(0), f(0)(980), f(2)(1270), K-2(*0)(1430) and f ‘(2)(1525) production in Z(0) decays

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC and Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M and Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D and Blom, HM Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T and Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB and Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S and Damgaard, G Davenport, M Da Silva, W Deghorain, A and Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Erzen, B Santo, ME Falk, E and Fanourakis, G Fassouliotis, D Fayot, J Feindt, M and Ferrari, P Ferrer, A Ferrer-Ribas, E Fichet, S and Firestone, A Flagmeyer, U Foeth, H Fokitis, E and Fontanelli, F Franek, B Frodesen, AG Fulda-Quenzer, F and Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M and Garcia, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Gerdyukov, L Ghodbane, N Gil, I and Glege, F Gokieli, R Golob, B Gomez-Ceballos, G and Goncalves, P Caballero, IG Gopal, G Gorn, L Gorski, M and Gouz, Y Gracco, V Grahl, J Graziani, E Green, C and Grimm, HJ Gris, P Grosdidier, G Grzelak, K Gunther, M and Guy, J Hahn, F Hahn, S Haider, S Hallgren, A and Hamacher, K Hansen, J Harris, FJ Hedberg, V Heising, S and Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S and Houlden, M Hrubec, J Huet, K Hughes, GJ Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK and Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Kersevan, BP and Khomenko, BA Khovanski, NN Kiiskinen, A King, B and Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P and Kokkinias, P Koratzinos, M Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kriznic, E Krstic, J and Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A and Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R and Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Miagkov, A and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moch, M Moeller, R Moenig, K Monge, MR and Moreau, X Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Neufeld, N Neumeister, N Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J and Palka, H Padadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O and Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Simard, L and Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Sokolov, A Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tchikilev, O Tegenfeldt, F Terranova, F Thomas, J and Timmermans, J Tinti, N Tkatchev, LG Todorova, S and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Tistram, G Trochimczuk, M Troncon, C and Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S and Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E Van Apeldoorn, GW Van Dam, P Van Doninck, WK and Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V and Wahlen, H Walck, C Weiser, C Wicke, D Wickens, JH and Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaboration
Abstract: DELPHI results are presented on the inclusive production of the neutral mesons rho(0), f(0)(980), f(2)(1270), K-2(*0)(1430) and f’(2)(1525) in hadronic Z(0) decays. They are based on about 2 million multihadronic events collected in 1994 and 1995, using the particle identification capabilities of the DELPHI Ring Imaging Cherenkov detectors and measured ionization losses in the Time Projection Chamber. The total production rates per hadronic Z(0) decay have been determined to be: 1.19 +/- 0.10 for rho(0); 0.164 +/- 0.021 for f(0)(980); 0.214 +/- 0.038 for f(2)(1270); 0.073 +/- 0.023 for K-2(*0)(1430); and 0.012 +/- 0.006 fur f’(2)(1525). The total production rates for all mesons and differential cross-sections for the rho(0), f(0)(980) and f(2)(1270) are compared with the results of other LEP experiments and with models, (C) 1999 Elsevier Science B.V, All rights reserved.
Published: 1999

26. A precise measurement of the partial decay width ratio Rb0 = Γbb̄/Γhad

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Belous, K. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Damgaard, G. Davenport, M. da Silva, W. 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 Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. McKay, R. McNulty, R. McPherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rakoczy, D. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, P. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stampfer, D. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Apeldoorn, G.W. van Dam, P. van Doninck, W.K. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Experiment
Abstract: The partial decay width of the Z to bb̄ quark pairs has been measured by the DELPHI detector at LEP using data taken in the years 1992 to 1995. Decays of b-hadrons were tagged by several methods using tracks with large impact parameters and/or reconstructed secondary vertices, complemented by event shape variables. Combining these methods in a multivariate analysis the value Γ(Z → bb̄)/Γ(Z → had) = 0.21634 ± 0.00067 (stat) ± 0.00060 (syst) was obtained, where the cc̄ production fraction was fixed to its Standard Model value.
Published: 1999

27. Search for neutral Higgs bosons in e+e- collisions at √s = 183 GeV

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Asman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. da Silva, W. 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 Min, A. de Paula, L. Dijkstra, H. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Guiither, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rakoczy, D. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sokolov, A. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stampfer, D. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tchikilev, O. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. van Apeldoorn, G.W. van Dam, P. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Subjects: Condensed Matter::Quantum Gases, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Neutral Higgs bosons were searched for in the data collected by DELPHI at a centre-of-mass energy of 183 GeV, corresponding to an integrated luminosity of 54 pb-1. The production of the lightest neutral Higgs boson with either an on-shell Z boson or a neutral pseudo-scalar Higgs boson was analysed. Lower limits at the 95% confidence level were obtained on the Higgs boson masses. The limits are 85.7 GeV/c2 for the Standard Model Higgs boson and 74.4 GeV/c2 for the scalar and 75.3 GeV/c2 for the pseudo-scalar Higgs bosons as predicted by the minimal super-symmetric extension of the Standard Model with commonly used assumptions on the model parameters, plus the assumption that the mass of the pseudo-scalar boson is greater than 20 GeV/c2. These results significantly improve the limits reached with previous data.
Published: 1999

28. Measurements of the leptonic branching fractions of the tau

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Ajinenko, I. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Yu. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschbeck, B. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. da Silva, W. Deghorain, A. della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Ferro, F. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansen, K.M.E. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Miagkov, A. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Nassiakou, M. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwering, B. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnova, O. Smith, G.R. Sokolov, A. Solovianov, O. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Apeldoorn, G.W. van Dam, P. van Doninck, W.K. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Abstract: Data collected with the DELPHI detector from 1993 to 1995 combined with previous DELPHI results for data from 1991 and 1992 yield the branching fractions B(tau –> e nu) = (17.877 +/- 0.109(stat) +/- 0.110(sys))% and B(tau –> mu nu) = (17.325 +/- 0.095(stat) +/- 0.077(sys))%.
Published: 1999

29. Search for composite and exotic fermions at LEP 2

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerruti, Ch. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Collins, P. Colomer, M. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Damgaard, G. Davenport, M. da Silva, W. 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 Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. di Diodato, A. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Fichet, S. Firestone, A. Fischer, P.-A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Gerber, J.-P. Gerdyukov, L. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kreuter, C. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kucewicz, W. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolaenko, V. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Piana, G. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rakoczy, D. Rames, J. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Silvestre, R. Simard, L. Simonetto, F. Sisakian, A.N. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stanescu, C. Stanic, S. Stapnes, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Tilquin, A. Timmermans, J. Tkatchev, L.G. Todorov, T. Todorova, S. Toet, D.Z. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Apeldoorn, G.W. van Dam, P. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A search for unstable heavy fermions with the DELPHI detector at LEP is reported. Sequential and non-canonical leptons, as well as excited leptons and quarks, are considered. The data analysed correspond to an integrated luminosity of about 48 pb-1 at an e+e- centre-of-mass energy of 183 GeV and about 20 pb-1 equally shared between the centre-of-mass energies of 172 GeV and 161 GeV. The search for pair-produced new leptons establishes 95% confidence level mass limits in the region between 70 GeV/c2 and 90 GeV/c2, depending on the channel. The search for singly produced excited leptons and quarks establishes upper limits on the ratio of the coupling of the excited fermion to its mass (λ/mf*) as a function of the mass.
Published: 1999

30. Search for chargino pair production in scenarios with gravitino LSP and stau NLSP at root s similar to 183 GeV at LEP

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, NC Benvenuti, AC Berat, C Berggren, M and Bertini, D Bertrand, D Besancon, M Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M and Bonivento, W Boonekamp, M Booth, PSL Borgland, AW and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M and Bracko, M Branchini, P Brenner, RA Bruckman, P and Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P and Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V and Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A and Cavallo, FR Chabaud, V Chapkin, M Charpentier, P and Chaussard, L Checchia, P Chelkov, GA Chierici, R and Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J and Cieslik, K Collins, P Contri, R Cortina, E Cosme, G and Cossutti, F Crawley, HB Crennell, D Crepe, S Crosetti, G and Maestro, JC Czellar, S Davenport, M Da Silva, W and Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J and Doroba, K Dracos, M Drees, J Dris, M Duperrin, A and Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M and Elsing, M Engel, JP Santo, ME Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrari, P Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Ghodbane, N Gil, I Glege, F Gokieli, R and Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG and Gopal, G Gorn, L Gouz, Y Gracco, V Grahl, J and Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J and Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K and Hansen, J Harris, FJ Hedberg, V Heising, S Hernandez, JJ and Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E and Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M and Hrubec, J Huber, M Huet, K Hughes, GJ Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Jeans, D and Johansson, EK Jonsson, P Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kernel, G Kersevan, BP Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ and Klapp, O Klein, H Kluit, P Kokkinias, P Koratzinos, M Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E Krumstein, Z Kubinec, P Kurowska, J and Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP and Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D and Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH and Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A and Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SM Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M and McKay, R McNulty, R McPherson, G Meroni, C Meyer, WT and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moreau, X and Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F Nassiakou, M and Navarria, FL Navas, S Nawrocki, K Negri, P Neufeld, N and Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M and Nomokonov, V Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J and Palka, H Papadopoulou, T Papageorgiou, K Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M Petrolini, A and Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T and Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S and Rahmani, H Rames, J Ratoff, PN Read, AL Rebecchi, P and Redaelli, NG Regler, M Rehn, J Reid, D Reinhardt, R and Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G and Rohme, O Romero, A Ronchese, R Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schwemling, P Schwering, B Schwickerath, U Scuri, F and Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R and Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Sokolov, A and Solovianov, O Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A and Tegenfeldt, F Terranova, F Thomas, J Timmermans, J and Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A and Tome, B Tonazzo, A Tortora, L Tortosa, P and Transtromer, G Treille, D Tristram, G Trochimczuk, M and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E and Vander Velde, C Van Dam, P Van Den Boeck, W Van Doninck, WK and Van Eldik, J Van Lysebetten, A Van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W Verbeure, F and Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V and Wahlen, H Walck, C Washbrook, AJ Weiser, C Wicke, D and Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G and Yi, J Yushchenko, O Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A and Zucchelli, GC Zumerle, G DELPHI Collaboration
Abstract: Promptly decaying lightest charginos were searched for in the context of scenarios with gravitino LSP. It was assumed that the stau is the next to lightest supersymmetric particle (NLSP). Data collected with the DELPHI detector at a centre-of-mass energy near 183 GeV were analysed combining the methods developed in previous searches. No evidence for the production of these particles was found. Hence, limits were derived at 95% confidence level. The mass of charginos was found to be greater than 85.5 GeV/c(2) for m(1+) -m(1) greater than or equal to 0.3 GeV/c(2), independently of the mass of the gravitino. (C) 1999 Published by Elsevier Science B.V. AU rights reserved.
Published: 1999

31. Search for scalar fermions and long-lived scalar leptons at centre-of-mass energies of 130 GeV to 172 GeV

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Anassontzis, EG Andersson, P Andreazza, A and Andringa, S Antilogus, P Apel, WD Arnoud, Y Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC and Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M and Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D and Blom, HM Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T and Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cerruti, C and Chabaud, V Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Collins, P Colomer, M Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S and Damgaard, G Davenport, M Da Silva, W 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 Min, A and De Paula, L Dijkstra, H Di Ciaccio, L Di Diodato, A and Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M and Duperrin, A Durand, JD Ehret, R Eigen, G Ekelof, T and Ekspong, G Ellert, M Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Fayot, J and Feindt, M Ferrari, P Ferrer, A Ferrer-Ribas, E and Fichet, S Firestone, A Fischer, PA Flagmeyer, U Foeth, H and Fokitis, E Fontanelli, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gamblin, S Gandelman, M Garcia, C Garcia, J and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN and Gele, D Gerber, JP Ghodbane, N Gil, I Glege, F and Gokieli, R Golob, B Goncalves, P Caballero, IG Gopal, G and Gorn, L Gorski, M Gouz, Y Gracco, V Grahl, J and Graziani, E Green, C Gris, P Grzelak, K Gunther, M and Guy, J Hahn, F Hahn, S Haider, S Hallgren, A and Hamacher, K Harris, FJ Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S and Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK and Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Khomenko, BA and Khovanski, NN Kiiskinen, A King, B Kjaer, NJ Klapp, O Klein, H Kluit, P Knoblauch, D Kokkinias, P and Konopliannikov, A Koratzinos, M Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kreuter, C and Kriznic, E Krstic, J Krumstein, Z Kubinec, P Kucewicz, W and Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V and Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G and Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Lokajicek, M and Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A and Malek, A Malmgren, TGM Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Mastroyiannopoulos, N Matorras, F Matteuzzi, C and Matthiae, G Mazik, J Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C and Meyer, WT Miagkov, A Migliore, E Mirabito, L and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Moreau, X Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navas, S and Nawrocki, K Negri, P Neufeld, N Neumeister, N and Nicolaidou, R Nielsen, BS Nikolaenko, V Nikolenko, M and Nomokonov, V Normand, A Nygren, A Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K and Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Papageorgiou, K and Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A and Passon, O Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Piana, G and Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME and Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rakoczy, D Ratoff, PN Read, AL Rebecchi, P Redaelli, NG and Regler, M Reid, D Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A and Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P and Rovelli, T Ruhlmann-Kleider, V Ruiz, A Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salt, J Sampsonidis, D and Sannino, M Schneider, H Schwemling, P Schwickerath, U and Schyns, MAE Seuri, F Seager, P Sedykh, Y Segar, AM and Sekulin, R Shellard, RC Sheridan, A Siebel, M and Silvestre, R Simard, L Simonetto, F Sisakian, AN Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR and Sopczak, A Sosnowski, R Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S and Stapnes, S Stevenson, K Stocchi, A Strauss, J Strub, R and Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T and Tchikilev, O Tegenfeldt, F Terranova, F Thomas, J and Tilquin, A Timmermans, J Tkatchev, LG Todorov, T and Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A and Tortora, L Transtromer, G Treille, D Tristram, G and Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E Vander Velde, C Van Apeldoorn, GW Van Dam, P and Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V Wahlen, H and Walck, C Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J Yushchenko, O and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Data taken by DELPHI during the 1995 and 1996 LEP runs have been used to search for the supersymmetric partners of electron, muon and tau leptons and of top and bottom quarks. The observations are in agreement with standard model predictions. Limits are set on sfermion masses. Searches for long lived scalar leptons from low scale supersymmetry breaking models exclude stau masses below 55 GeV/c(2) at the 95% confidence level, irrespective of the gravitino mass.
Published: 1999

32. Search for charginos nearly mass-degenerate with the lightest neutralino

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Alderweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amapane, N. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Behrmann, A. Beilliere, P. Belokopytov, Y. Belous, K. Benekos, N.C. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, P. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Cieslik, K. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crepe, S. Crosetti, G. Cuevas Maestro, J. Czellar, S. Davenport, M. da Silva, W. Deghorain, A. della Ricca, G. Delpierre, P. Demaria, N. de Angelis, A. de Boer, W. de Clercq, C. de Lotto, B. de Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Fichet, S. Firestone, A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, P. Gazis, E.N. Gele, D. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Y. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Hahn, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Hansen, J. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Hoorelbeke, S. Houlden, M. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, C. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kriznic, E. Krstic, P. Krumstein, Z. Kubinec, P. Kurowska, J. Kurvinen, K. Lacasta, C. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Maltezos, S. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Masik, J. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mitaroff, W.A. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rakoczy, D. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, C. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, P. Schwering, B. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stampfer, D. Stanescu, C. Stanic, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Tomaradze, A. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M-L. Tyapkin, I.A. Tzamarias, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Vander Velde, C. van Apeldoorn, G.W. van Dam, P. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C. Zumerle, G.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for charginos with masses close to the mass of the lightest neutralino is reported, based on the data collected with the DELPHI detector at LEP from 1995 to 1997 at centre-of-mass energies between 130 and 183 GeV. The signature of a photon at high transverse momentum radiated from the initial state reduces the two-photon background to acceptable rates, thus making the mass differences between a few hundred MeV/c(2) and 3 GeV/c(2) detectable. In very nearly degenerate scenarios, the lifetime of the chargino can be large enough to produce either visible secondary vertices or decays outside the detector; therefore, quasi-stable heavy charged particles and displaced decay vertices were also searched for. No excess of events with respect to the Standard Model expectations was observed, and limits in the plane of chargino-neutralino mass difference versus chargino mass-are given.
Published: 1999

33. Multiplicity fluctuations in one- and two-dimensional angular intervals compared with analytic QCD calculations

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U and Amapane, N Amato, S Anassontzis, EG Andersson, P and Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y and Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY and Barker, G Baroncelli, A Battaglia, M Baubillier, M and Becks, KH Begalli, M Behrmann, A Beilliere, P and Belokopytov, Y Benekos, NC Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM and Bonesini, M Bonivento, W Boonekamp, M Booth, PSL and Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I and Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschbeck, B Buschmann, P Cabrera, S and Caccia, M Calvi, M Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R and Cortina, E Cosme, G Cossuti, F Cowell, JH Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC and Czellar, S Davenport, M Da Silva, W Deghorain, A Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L and Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M and Drees, J Dris, M Duperrin, A Durand, JD Eigen, G and Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fanourakis, G Fassouliotis, D and Fayot, J Feindt, M Ferrari, P Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C and Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D and Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R and Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG and Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Grahl, J Graziani, E Green, C Grimm, HJ Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S and Haider, S Hallgren, A Hamacher, K Hansen, J Harris, FJ and Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kersevan, BP Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Koratzinos, M and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krstic, P Krumstein, Z Kubinec, P Kurowska, J and Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V and Laugier, JP Lauhakangas, R Leder, G Ledroit, F and Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G and Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P and Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A and Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J and Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J Mastroyiannopoulos, N Matorras, F and Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M and McCubbin, M McKay, R McNulty, R McPherson, G Meroni, C and Meyer, WT Miagkov, A Migliore, E Mirabito, L and Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R and Moenig, K Monge, MR Moreau, X Morettini, P Morton, G and Mueller, U Muenich, K Mulders, M Mulet-Marquis, C and Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T and Naraghi, F Nassiakou, M Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neufeld, N Neumeister, N and Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M and Peralta, L Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E and Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Ratoff, PN Read, AL Rebecchi, P and Redaelli, NG Regler, M Reid, D Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G and Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinsky, P and Roudeau, P Rovelli, T Royon, C Ruhlmann-Kleider, V and Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G and Salt, J Sampsonidis, D Sannino, M Schneider, H and Schwemling, P Schwering, B Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR and Sokolov, A Sopczak, A Sosnowski, R Spassov, T Spiriti, E and Sponholz, P Squarcia, S Stanescu, C Stanic, S and Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tchikilev, O and Tegenfeldt, F Terranova, F Thomas, J Timmermans, J and Tinti, N Tkatchev, LG Todorova, S Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Tristram, G Trochimczuk, M Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ullaland, O Uvarov, V and Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V and Wahlen, H Walck, C Weiser, C Wicke, D Wickens, JH and Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Multiplicity fluctuations in rings around the jet axis and in off-axis canes have been measured by the DELPHI collaboration in e(+)e(-) annihilations into hadrons at LEP energies. The measurements are compared with analytical perturbative QCD calculations for the corresponding multiparton system, using the concept of Local Parton Hadron Duality. Some qualitative features are confirmed by the data but substantial quantitative deviations are observed. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
Published: 1999

34. A precise measurement of the partial decay width ratio R-b(0) = Gamma(b(b)over-bar)/Gamma(had)

Author: Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P and Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G and Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Belous, K Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM and Bonesini, M Bonivento, W Boonekamp, M Booth, PSL and Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I and Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Chapkin, M Charpentier, P Chaussard, L Checchia, P and Chelkov, GA Chierici, R Chliapnikov, P Chochula, P and Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R and Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC and Czellar, S Damgaard, G Davenport, M 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 Min, A De Paula, L Dijkstra, H Di Ciaccio, L and Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M and Duperrin, A Durand, JD Eigen, G Ekelof, T Ekspong, G and Ellert, M Elsing, M Engel, JP Erzen, B Santo, ME and Falk, E Fanourakis, G Fassouliotis, D Fayot, J Feindt, M and Fenyuk, A Ferrari, P Ferrer, A Ferrer-Ribas, E and Fichet, S Firestone, A Flagmeyer, U Foeth, H Fokitis, E and Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R and Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C Gaspar, M and Gasparini, U Gavillet, P Gazis, EN Gele, D Ghodbane, N and Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G Gorn, L and Gorski, M Gouz, Y Gracco, V Grahl, J Graziani, E and Green, C Grimm, HJ Gris, P Grosdidier, G Grzelak, K and Gunther, M Guy, J Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Hansen, J Harris, FJ Hedberg, V and Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ and Hoorelbeke, S Houlden, M Huet, K Hughes, GJ Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B and Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R and Kersevan, BP Khomenko, BA Khovanski, NN Kiiskinen, A and King, B Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P Kokkinias, P Koratzinos, M Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E and Krstic, J Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V and Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R and Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T and Moch, M Moeller, R Moenig, K Monge, MR Moreau, X and Morettini, P Morton, G Mueller, U Muenich, K Mulders, M and Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B and Myatt, G Myklebust, T Naraghi, F Navarria, FL Navas, S and Nawrocki, K Negri, P Neufeld, N Neumeister, N and Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M and Peralta, L Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E and Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D and Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN Read, AL and Rebecchi, P Redaelli, NG Regler, M Reid, D Reinhardt, R and Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P Rosenberg, EI and Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Simard, L and Simonetto, F Sisakian, AN Smadja, G Smirnov, N Smirnova, O Smith, GR Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tegenfeldt, F Terranova, F Thomas, J Timmermans, J and Tinti, N Tkatchev, LG Todorova, S Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Tristram, G Trochimczuk, M Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ueberschaer, B Ullaland, O and Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW and Van Dam, P Van Doninck, WK Van Eldik, J Van Lysebetten, A and Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V and Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS and Vollmer, C Voulgaris, G Vrba, V Wahlen, H Walck, C and Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M and Witek, M Wolf, G Yi, J Yushchenko, O Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The partial decay width of the Z to b (b) over bar quark pairs has been measured by the DELPHI detector at LEP using data taken in the years 1992 to 1995. Decays of b-hadrons were tagged by several methods using tracks with large impact parameters and/or reconstructed secondary vertices; complemented by event shape variables. Combining these methods in a multivariate analysis the value Gamma(Z –> b (b) over bar)/Gamma(Z –> had) = 0.21634 +/- 0.00067(stat) +/- 0.00060(syst) was obtained, where the c (c) over bar production fraction was fixed to its Standard Model value.
Published: 1999

35. Energy dependence of inclusive spectra in e(+)e(-) annihilation

Author: Abreu, P Adan, W Adye, T Adzic, P Albrecht, Z and Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T and Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S and Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE and Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Behrmann, A Beilliere, P Belokopytov, Y and Belous, K Benekos, NC Benvenuti, AC Berat, C Berggren, M and Bertini, D Bertrand, D Besancon, M Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M and Bonivento, W Boonekamp, M Booth, PSL Borgland, AW and Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B and Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M and Branchini, P Brenke, T Brenner, RA Bruckman, P and Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M and Camporesi, T Canale, V Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, M and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB and Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S and Davenport, M Da Silva, W Deghorain, A Della Ricca, G and Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H and Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, JD Eigen, G Ekelof, T and Ekspong, G Ellert, M Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D and Fayot, J Feindt, M Fenyuk, A Ferrari, P Ferrer, A and Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Ghodbane, N Gil, I Glege, F Gokieli, R and 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 Grimm, HJ Gris, P and Grosdidier, G Grzelak, K Gunther, M Guy, J Hahn, F and Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J and Harris, FJ Heising, S Hernandez, JJ Herquet, P Herr, H and Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huet, K and Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R and Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kersevan, BP Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O and Klein, H Kluit, P Kokkinias, P Koratzinos, M and Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M and Kriznic, E Krstic, P Krumstein, Z Kubinec, P Kurowska, J and Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Laugier, JP Lauhakangas, R Ledroit, F Lefebure, V Leinonen, L and Leisos, A Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, 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 Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT and Migliore, E Mirabito, L Mitaroff, WA Moernmark, U Moa, T and Moch, M Moeller, R Moenig, K Monge, MR Moreau, X and Morettini, P Morton, G Mueller, U Muenich, K Mulders, M and Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B and Myatt, G Myklebust, T Naraghi, F Nassiakou, M Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neufeld, N Neumeister, N Nicolaidou, R Nielsen, BS Nikolenko, M and Nomokonov, V Normand, A Nygren, A Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K and Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Papageorgiou, K and Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A and Passon, O Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F and Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G and Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N and Pullia, A Radojicic, D Ragazzi, S Rahmani, H Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwering, B Schwickerath, U and Schyns, MAE Scuri, F Seager, P Sedykh, Y Segar, AM and Sekulin, R Shellard, RC Sheridan, A Siebel, M and Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnov, N and Smirnova, O Smith, GR Sopczak, A Sosnowski, R and Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tchikilev, O Tegenfeldt, F Terranova, F Thomas, J and Timmermans, J Tinti, N Tkatchev, LG Todorova, S and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C and Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW and Van Dam, P Van Eldik, J Van Lysebetten, A Van Remortel, N and Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V and Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS and Vollmer, C Voulgaris, G Vrba, V Wahlen, H Walck, C and Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M and Witek, M Wolf, G Yi, J Yushchenko, O Zaitsev, A and Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E and Zimin, NI Zucchelli, GC Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: Inclusive charged hadron distributions as obtained from the DELPHI measurements at 130, 136, 161, 172 and 183 GeV are presented as a function of the variables rapidity, xi(p), p and transversal momenta. Data are compared with event generators and with MLLA calculations, in order to examine the hypothesis of local parton hadron duality. The differential momentum spectra show an indication for coherence effects in the production of soft particles. The relation between the energy dependence of the charged multiplicity and the rapidity distribution is examined. (C) 1999 Elsevier Science B.V. All rights reserved.
Published: 1999

36. Search for neutral Higgs bosons in e(+)e(-) collisions at root s=183 GeV

Author: Abreu, P Adam, W Adye, T Adzic, AP Ajinenko, I and Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R and Allmendinger, T Allport, PP Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S and Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F and Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC and Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M and Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D and Blom, HM Bonesini, M Bonivento, W Boonekamp, M and Booth, PSL Borgland, AW Borisov, G Bosio, C Botner, O and Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV and Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T and Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V and Charpentier, P Chaussard, L Checchia, P Chelkov, GA and Chierici, R Chliapnikov, P Chochula, P Chorowicz, V and Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB and Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S and Davenport, M Da Silva, W Deghorain, A Della Ricca, G and Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K and Dracos, M Drees, J Dris, M Duperrin, A Durand, JD and Eigen, G Ekelof, T Ekspong, G Ellert, M Elsing, M and Engel, JP Erzen, B Santo, ME Falk, E Fanourakis, G and Fassouliotis, D Fayot, J Feindt, M Ferrari, P and Ferrer, A Ferrer-Ribas, E Fichet, S Firestone, A and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Gerdyukov, L Ghodbane, N Gil, I Glege, F and Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P and Caballero, IG Gopal, G Gorn, L Gorski, M Gouz, Y and Gracco, V Grahl, J Graziani, E Green, C Grimm, HJ and Gris, P Grosdidier, G Grzelak, K Gunther, M Guy, J and Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K and Hansen, J Harris, FJ Hedberg, V Heising, S Hernandez, JJ and Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E and Holmgren, SO Holt, PJ Hoorelbeke, S Moulden, M and Hrubec, J Huet, K Hughes, GJ Hultqvist, K Jackson, JN and Jacobsson, R Jalocha, P Janik, R Jarlskog, C and Jarlskog, G Jarry, P Jean-Marie, B Johansson, EK and Jonsson, P Joram, C Juilllot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Kersevan, BP and Khomenko, BA Khovanski, NN Kiiskinen, A King, B and Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P and Kokkinias, P Koratzinos, M Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Kriznic, E Krstic, J Krumstein, Z and Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW and Langefeld, P Lapin, V Laugier, JP Lauhakangas, R and Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A and Leitner, R Lenzen, G Lepeltier, V Lesiak, T and Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I and Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R and Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT Miagkov, A and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U and Moa, T Moch, M Moeller, R Moenig, K Monge, MR and Moreau, X Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Neufeld, N Neumeister, N Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG and Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A and Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J and Palka, H Papadopoulou, TD Papageorgiou, K Pape, L and Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O and Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Royon, C and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Simard, L and Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Sokolov, A Sopczak, A Sosnowski, R Spassov, T and Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stevenson, K Stocchi, A Strauss, J and Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tchikilev, O Tegenfeldt, F Terranova, F Thomas, J and Timmermans, J Tinti, N Tkatchev, LG Todorova, S and Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C and Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S and Ueberschaer, B Ullaland, O Uvarov, V Valenti, G and Vallazza, E Vander Velde, C Van Apeldoorn, GW Van Dam, P and Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V and Wahlen, H Walck, C Weiser, C Wicke, D Wickens, JH and Wilkinson, GR Winter, MN Witek, M Wolf, G Yi, J and Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D and Zevgolatakos, E Zimin, NI Zucchelli, GC Zumerle, G and DELPHI Collaboration
Subjects: Condensed Matter::Quantum Gases, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Neutral Higgs bosons were searched for in the data collected by DELPHI at a centre-of-mass energy of 183 GeV, corresponding to an integrated luminosity of 54 pb(-1). The production of the lightest neutral Higgs boson with either an on-shell Z boson or a neutral pseudo-scalar Higgs boson was analysed. Lower limits at the 95% confidence level were obtained on the Higgs boson masses. The limits are 85.7 GeV/c(2) for the Standard Model Higgs boson and 74.4 GeV/c(2) for the scalar and 75.3 GeV/c(2) for the pseudo-scalar Higgs bosons as predicted by the minimal super-symmetric extension of the Standard Model with commonly used assumptions on the model parameters, plus the assumption that the mass of the pseudo-scalar boson is greater than 20 GeV/c(2). These results significantly improve the limits reached with previous data.
Published: 1999

37. Measurement of Abb̄FB in hadronic Z decays using a jet charge technique

Author: Abreu, P. Adam, W. Adye, T. Adzic, P. Albrecht, Z. Aldeweireld, T. Alekseev, G.D. Alemany, R. Allmendinger, T. Allport, P.P. Almehed, S. Amaldi, U. Amato, S. Anassontzis, E.G. Andersson, P. Andreazza, A. Andringa, S. Antilogus, P. Apel, W.-D. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Barbier, R. Bardin, D.Y. Barker, G. Baroncelli, A. Battaglia, M. Baubillier, M. Becks, K.-H. Begalli, M. Beilliere, P. Belokopytov, Yu. Belous, K. Benvenuti, A.C. Berat, C. Berggren, M. Bertini, D. Bertrand, D. Besancon, M. Bianchi, F. Bigi, M. Bilenky, M.S. Bizouard, M.-A. Bloch, D. Blom, H.M. Bonesini, M. Bonivento, W. Boonekamp, M. Booth, P.S.L. Borgland, A.W. Borisov, G. Bosio, C. Botner, O. Boudinov, E. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Boyko, I. Bozovic, I. Bozzo, M. Branchini, P. Brenke, T. Brenner, R.A. Bruckman, P. Brunet, J.-M. Bugge, L. Buran, T. Burgsmueller, T. Buschmann, P. Cabrera, S. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Chabaud, V. Chapkin, M. Charpentier, Ph. Chaussard, L. Checchia, P. Chelkov, G.A. Chierici, R. Chliapnikov, P. Chochula, P. Chorowicz, V. Chudoba, J. Collins, P. Contri, R. Cortina, E. Cosme, G. Cossutti, F. Cowell, J.-H. Crawley, H.B. Crennell, D. Crosetti, G. Cuevas Maestro, J. Czellar, S. Damgaard, G. Davenport, M. da Silva, W. 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 Min, A. de Paula, L. Dijkstra, H. di Ciaccio, L. Dolbeau, J. Doroba, K. Dracos, M. Drees, J. Dris, M. Duperrin, A. Durand, J.-D. Eigen, G. Ekelof, T. Ekspong, G. Ellert, M. Elsing, M. Engel, J.-P. Erzen, B. Espirito Santo, M. Falk, E. Fanourakis, G. Fassouliotis, D. Fayot, J. Feindt, M. Fenyuk, A. Ferrari, P. Ferrer, A. Ferrer-Ribas, E. Fichet, S. Firestone, A. Fischer, P.-A. Flagmeyer, U. Foeth, H. Fokitis, E. Fontanelli, F. Franek, B. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Fuster, J. Galloni, A. Gamba, D. Gamblin, S. Gandelman, M. Garcia, C. Garcia, J. Gaspar, C. Gaspar, M. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gele, D. Ghodbane, N. Gil, I. Glege, F. Gokieli, R. Golob, B. Gomez-Ceballos, G. Goncalves, P. Gonzalez Caballero, I. Gopal, G. Gorn, L. Gorski, M. Gouz, Yu. Gracco, V. Grahl, J. Graziani, E. Green, C. Grimm, H.-J. Gris, P. Grosdidier, G. Grzelak, K. Gunther, M. Guy, J. Halm, F. Hahn, S. Haider, S. Hallgren, A. Hamacher, K. Harris, F.J. Hedberg, V. Heising, S. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Heuser, J.-M. Higon, E. Holmgren, S.-O. Holt, P.J. Holthuizen, D. Hoorelbeke, S. Houlden, M. Hrubec, J. Huet, K. Hughes, G.J. Hultqvist, K. Jackson, J.N. Jacobsson, R. Jalocha, P. Janik, R. Jarlskog, Ch. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Jonsson, P. Joram, C. Juillot, P. Kapusta, F. Karafasoulis, K. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kersevan, B.P. Khomenko, B.A. Khovanski, N.N. Kiiskinen, A. King, B. Kinvig, A. Kjaer, N.J. Klapp, O. Klein, H. Kluit, P. Kokkinias, P. Koratzinos, M. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Krammer, M. Kreuter, C. Kriznic, E. Krstic, J. Krumstein, Z. Kubinec, P. Kucewicz, W. Kurowska, J. Kurvinen, K. Lamsa, J.W. Lane, D.W. Langefeld, P. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lefebure, V. Leinonen, L. Leisos, A. Leitner, R. Lenzen, G. Lepeltier, V. Lesiak, T. Lethuillier, M. Libby, J. Liko, D. Lipniacka, A. Lippi, I. Loerstad, B. Loken, J.G. Lopes, J.H. Lopez, J.M. Lopez-Fernandez, R. Loukas, D. Lutz, P. Lyons, L. MacNaughton, J. Mahon, J.R. Maio, A. Malek, A. Malmgren, T.G.M. Malychev, V. Mandl, F. Marco, J. Marco, R. Marechal, B. Margoni, M. Marin, J.-C. Mariotti, C. Markou, A. Martinez-Rivero, C. Martinez-Vidal, F. Marti i Garcia, S. Mastroyiannopoulos, N. Matorras, F. Matteuzzi, C. Matthiae, G. Mazik, J. Mazzucato, F. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Mc Pherson, G. Meroni, C. Meyer, W.T. Migliore, E. Mirabito, L. Mjoernmark, U. Moa, T. Moch, M. Moeller, R. Moenig, K. Monge, M.R. Moreau, X. Morettini, P. Morton, G. Mueller, U. Muenich, K. Mulders, M. Mulet-Marquis, C. Muresan, R. Murray, W.J. Muryn, B. Myatt, G. Myklebust, T. Naraghi, F. Navarria, F.L. Navas, S. Nawrocki, K. Negri, P. Nemecek, S. Neufeld, N. Neumeister, N. Nicolaidou, R. Nielsen, B.S. Nikolenko, M. Nomokonov, V. Normand, A. Nygren, A. Obraztsov, V. Olshevski, A.G. Onofre, A. Orava, R. Orazi, G. Osterberg, K. Ouraou, A. Paganoni, M. Paiano, S. Pain, R. Paiva, R. Palacios, J. Palka, H. Papadopoulou, T.D. Papageorgiou, K. Pape, L. Parkes, C. Parodi, F. Parzefall, U. Passeri, A. Passon, O. Pegoraro, M. Peralta, L. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Phillips, H.T. Pierre, F. Pimenta, M. Piotto, E. Podobnik, T. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pukhaeva, N. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Rakoczy, D. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Reinhardt, R. Renton, P.B. Resvanis, L.K. Richard, F. Ridky, J. Rinaudo, G. Rohne, O. Romero, A. Ronchese, P. Rosenberg, E.I. Rosinsky, P. Roudeau, P. Rovelli, T. Royon, Ch. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sadovsky, A. Sajot, G. Salt, J. Sampsonidis, D. Sannino, M. Schneider, H. Schwemling, Ph. Schwickerath, U. Schyns, M.A.E. Scuri, F. Seager, P. Sedykh, Y. Segar, A.M. Sekulin, R. Shellard, R.C. Sheridan, A. Siebel, M. Simard, L. Simonetto, F. Sisakian, A.N. Skaali, T.B. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sopczak, A. Sosnowski, R. Spassov, T. Spiriti, E. Sponholz, P. Squarcia, S. Stampfer, D. Stanescu, C. Stanic, S. Stapnes, S. Stevenson, K. Stocchi, A. Strauss, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Tabarelli, T. Tegenfeldt, F. Terranova, F. Thomas, J. Tilquin, A. Timmermans, J. Tinti, N. Tkatchev, L.G. Todorova, S. Toet, D.Z. Tome, B. Tonazzo, A. Tortora, L. Transtromer, G. Treille, D. Tristram, G. Trochimczuk, M. Troncon, C. Tsirou, A. Turluer, M.-L. Tyapkin, I.A. Tzamarias, S. Ueberschaer, B. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. van Apeldoorn, G.W. van Dam, P. van Eldik, J. van Lysebetten, A. van Vulpen, I. Vassilopoulos, N. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Verzi, V. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, C. Voulgaris, G. Vrba, V. Wahlen, H. Walck, C. Weiser, C. Wicke, D. Wickens, J.H. Wilkinson, G.R. Winter, M. Witek, M. Wolf, G. Yi, J. Yushchenko, O. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zimin, N.I. Zucchelli, G.C.
Abstract: The bb̄ forward-backward asymmetry has been determined from the average charge flow measured in a sample of 3,500,000 hadronic Z decays collected with the DELPHI detector in 1992 - 1995. The measurement is performed in an enriched bb̄ sample selected using an impact parameter tag and results in the following values for the bb̄ forward-backward asymmetry: Abb̄FB (89.55 GeV) = 0.068 ± 0.018 (stat.) ± 0.0013(syst.) Abb̄FB (91.26 GeV) = 0.0982 ± 0.0047(stat.) ± 0.0016(syst.) Abb̄FB (92.94 GeV) = 0.123 ± 0.016 (stat.) ± 0.0027(syst.) The bb̄ charge separation required for this analysis is directly measured in the b tagged sample, while the other charge separations are obtained from a fragmentation model precisely calibrated to data. The effective weak mixing angle is deduced from the measurement to be: sin2θ1eff = 0.23186 ± 0.00083.
Published: 1999

38. Search for lightest neutralino and stau pair production in light gravitino scenarios with stau NLSP

Author: Abreu, P Adam, W Adye, T Adzic, P Alderweireld, T and Alekseev, GD Alemany, R Allmendinger, T Allport, PP and Almehed, S Amaldi, U Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, WD and Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P and Bambade, P Barao, F Barbiellini, G Barbier, R and Bardin, DY Barker, G Baroncelli, A Battaglia, M and Baubillier, M Becks, KH Begalli, M Beilliere, P and Belokopytov, Y Belous, K Benvenuti, AC Berat, C and Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM and Bonesini, M Bonivento, W Boonekamp, M Booth, PSL and Borgland, AW Borisov, G Bosio, C Botner, O Boudinov, E and Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I and Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA and Bruckman, P Brunet, JM Bugge, L Buran, T and Burgsmueller, T Buschmann, P Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Carena, F and Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR and Chabaud, V Chapkin, M Charpentier, P Chaussard, L and Checchia, P Chelkov, GA Chierici, R Chliapnikov, P and Chochula, P Chorowicz, V Chudoba, J Collins, P Colomer, M Contri, R Cortina, E Cosme, G Cossutti, F Cowell, JH Crawley, HB Crennell, D Crosetti, G Maestro, JC and Czellar, S Damgaard, G Davenport, M 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 Min, A De Paula, L Dijkstra, H Eigen, G and Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP and Erzen, B Santo, ME Falk, E Fanourakis, G Fassouliotis, D and Fayot, J Feindt, M Fenyuk, A Ferrari, P Ferrer, A and Ferrer-Ribas, E Fichet, S Firestone, A Fischer, PA and Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B and Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J and Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C and Garcia, J Gaspar, C Gaspar, G Gasparini, U Gavillet, P Gazis, EN Gele, D Ghodbane, N Gil, I Glege, F and Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P and Caballero, IG Gopal, G Gorn, L Gorski, M Gouz, Y and Gracco, V Grahl, J Graziani, E Green, C Grimm, HJ and Gris, P Grzelak, K Gunther, M Guy, J Hahn, F Hahn, S and Haider, S Hallgren, A Hamacher, K Harris, FJ and Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H and Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J and Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P and Janik, R Jarlskog, C Jarlskog, G Jarry, P and Jean-Marie, B Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC and Keranen, R Kersevan, BP Khomenko, BA Khovanski, NN and Kiiskinen, A King, B Kjaer, NJ Klapp, O Klein, H and Kluit, P Kokkinias, P Koratzinos, M Kostioukhine, V and Kourkoumelis, C Kouznetsov, O Krammer, M Kreuter, C and Kriznic, E Krstic, J Krumstein, Z Kubinec, P Kucewicz, W and Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V and Laugier, JP Lauhakangas, R Ledroit, F Lefebure, V and Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI Masik, J and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Masik, J Mazzucato, F Mazzucato, M McCubbin, M and McKay, R McNulty, R McPherson, G Meroni, C Meyer, WT and Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Moreau, X and Morettini, P Morton, G Mueller, U Muenich, K Mulders, M and Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B and Myatt, G Myklebust, T Naraghi, F Navarria, FL Navas, S and Nawrocki, K Negri, P Neufeld, N Neumeister, N and Nicolaidou, R Nielsen, BS Nikolenko, M Nomokonov, V and Normand, A Nygren, A Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H and Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C and Parodi, F Parzefall, U Passeri, A Passon, O Pegoraro, M and Peralta, L Pernicka, M Perrotta, A Petridou, C and Petrolini, A Phillips, HT Piana, G Pierre, F Pimenta, M and Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P and Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A and Radojicic, D Ragazzi, S Rahmani, H Rakoczy, D Ratoff, PN and Read, AL Rebecchi, P Redaelli, NG Regler, M Reid, D and Reinhardt, R Renton, PB Resvanis, LK Richard, F and Ridky, J Rinaudo, G Rohne, O Romero, A Ronchese, P and Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T and Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y and Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M and Schneider, H Schwemling, P Schwickerath, U Schyns, MAE and Scuri, F Seager, P Sedykh, Y Segar, AM Sekulin, R and Shellard, RC Sheridan, A Siebel, M Silvestre, R and Simard, L Simonetto, F Sisakian, AN Skaali, TB Smadja, G and Smirnov, N Smirnova, O Smith, GR Sopczak, A and Sosnowski, R Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tegenfeldt, F and Terranova, F Thomas, J Tilquin, A Timmermans, J and Tkatchev, LG Todorova, S Toet, DZ Tomaradze, A Tome, B and Tonazzo, A Tortora, L Transtromer, G Treille, D and Tristram, G Troncon, C Tsirou, A Turluer, ML Tyapkin, IA and Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V and Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A Van Vulpen, I Vassilopoulos, N and Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M and Vertogradov, LS Verzi, V Vilanova, D Vitale, L and Vlasov, E Vodopyanov, AS Vollmer, C Voulgaris, G Vrba, V and Wahlen, H Walck, C Wieser, C Wicke, D Wickens, JH and Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J and Yushchenko, O Zaitsev, A Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zucchelli, GC and Zumerle, G DELPHI Collaboration
Abstract: Promptly decaying lightest neutralinos and long-lived staus are searched for in the context of light gravitino scenarios. It is assumed that the stau is the next to lightest supersymmetric particle (NLSP) and that the lightest neutralino is the next to NLSP (NNLSP). Data collected with the Delphi detector at centre-of-mass energies from 161 to 183 GeV are analysed. No evidence of the production of these particles is found. Hence, lower mass limits for both kinds of particles are set at 95% C.L.. The mass of gaugino-like neutralinos is found to be greater than 71.5 GeV/c(2). In the search for long-lived stau: masses less than 70.0 to 77.5 GeV/c(2) are excluded for gravitino masses from 10 to 150 eV/c(2). Combining this search with the searches for stable heavy leptons and minimal supersymmetric standard model staus a lower limit of 68.5 GeV/c(2) may be set for the stau mass independent of the mass of the gravitino.
Published: 1999

39. Two-particle angular correlations in e(+)e(-) interactions compared with QCD predictions

Author: Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I and Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U and Amato, S Anassontzis, EG Andersson, P Andreazza, A and Andringa, S Antilogus, P Apel, WD Arnoud, Y Asman, B and Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G and Baroncelli, A Battaglia, M Baubillier, M Becks, KH and Begalli, M Beilliere, P Belokopytov, Y Belous, K and Benvenuti, AC Berat, C Berggren, M Bertini, D Bertrand, D Besancon, M Bianchi, F Bigi, M Bilenky, MS and Bizouard, MA Bloch, D Blom, HM Bonesini, N Bonivento, W and Boonekamp, M Booth, PSL Borgland, AW Borisov, G and Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C and Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Branchini, P Brenke, T Brenner, RA 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 Carena, F Carroll, L Caso, C and Gimenez, MVC Cattai, A Cavallo, FR Cerruti, C and Chabaud, V Charpentier, P Chochula, P Chorowicz, V and Chudoba, J Collins, P Colomer, M Contri, R Cortina, E and Cosme, G Cossutti, F Cowell, JH Crawley, HB and Crennell, D Crosetti, G Maestro, JC Czellar, S Damgaard, G Davenport, M Da Silva, W Deghorain, A Della Ricca, G and Delpierre, P Demaria, N De Angelis, A De Boer, W De Brabandere, S De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, K Di Ciaccio, L Di Diodato, A and Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M and Duperrin, A Durand, JD Ehret, R Eigen, G Ekelof, T and Ekspong, G Ellert, M Elsing, M Engel, JP Erzen, B and Santo, ME Falk, E Fanourakis, G Fassouliotis, D Fayot, J and Feindt, M Ferrari, P Ferrer, A Ferrer-Ribas, E and Fichet, S Firestone, A Fischer, PA Flagmeyer, U Foeth, H and Fokitis, E Fontanelli, F Franek, B Frodesen, AG and Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A and Gamba, D Gamblin, S Gandelman, M Garcia, C Garcia, J and Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN and Gele, D Gerber, JP Gerdyukov, L Ghodbane, N Gil, I and Glege, F Gokieli, R Golob, B Goncalves, P Caballero, IG Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V and Grahl, J Graziani, E Green, C Gris, P Grzelak, K and Gunther, M Guy, J Hahn, F Hahn, S Haider, S and Hallgren, A Hamacher, K Harris, FJ Hedberg, V Heising, S and Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Holthuizen, D and Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K and Jackson, JN Jacobsson, R Jalocha, P Janik, R and Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B and Johansson, EK Jonsson, P Joram, C Juillot, P Kapusta, F and Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R and Khomenko, BA Khovanski, NN Kiiskinen, A King, B and Kjaer, NJ Klapp, O Klein, H Kluit, P Knoblauch, D and Kokkinias, P Koratzinos, M Kostioukhine, V Kourkoumelis, C and Kouznetsov, O Krammer, M Kreuter, C Kriznic, E and Krstic, J Krumstein, Z Kubinec, P Kucewicz, W Kurvinen, K Lamsa, JW Lane, DW Langefeld, P Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V and Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V and Lesiak, T Lethuillier, M Libby, J Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM and Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L and MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM and Malychev, V Mandl, F Marco, J Marco, R Marechal, B and Margoni, M Marin, JC Mariotti, C Markou, A and Martinez-Rivero, C Martinez-Vidal, F Garcia, SMI and Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G and Mazik, J Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Meroni, C Meyer, WT and Miagkov, A Migliore, E Mirabito, L Mitaroff, WA and Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR and Moreau, X Morettini, P Morton, G Mueller, U Muenich, K and Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ and Muryn, B Myatt, G Myklebust, T Naraghi, F Navarria, FL and Navas, S Nawrocki, K Negri, P Neufeld, N Neumeister, N Nicolaidou, R Nielsen, BS Nikolaenko, V Nikolenko, M and Nomokonov, V Normand, A Nygren, A Obraztsov, V and Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K and Ouraou, A Paganoni, M Paiano, S Pain, R Paiva, R and Palacios, J Palka, H Papadopoulou, TD Papageorgiou, K and Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A and Passon, O Pegoraro, M Peralta, L Pernicka, M Perrotta, A and Petridou, C Petrolini, A Phillips, HT Piana, G and Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME and Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H and Rakoczy, D Rames, J Ratoff, PN Read, AL Rebecchi, P and Redaelli, NG Raid, D Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Rohne, O Romero, A and Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P and Rovelli, T Ruhlmann-Kleider, V Ruiz, A Saarikko, H and Sacquin, Y Sadovsky, A Sajot, G Salt, J Sampsonidis, D and Sannino, M Schneider, H Schwemling, P Schwickerath, U and Schyns, MAE Scuri, F Seager, P Sedykh, Y Segar, AM and Sekulin, R Shellard, RC Sheridan, A Siebel, M and Silvestre, R Simard, L Simonetto, F Sisakian, AN Skaali, TB Smadja, G Smirnova, O Smith, GR Sopczak, A and Sosnowski, R Spassov, T Spiriti, E Sponholz, P Squarcia, S Stampfer, D Stanescu, C Stanic, S Stapnes, S and Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B and Szczekowski, M Szeptycka, M Tabarelli, T Tchikilev, O and Tegenfeldt, F Terranova, F Thomas, J Tilquin, A and Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L and Transtromer, G Treille, D Tristram, G Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tzamarias, S Ueberschaer, B and Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Apeldoorn, GW Van Dam, P Van Eldik, J Van Lysebetten, A and Van Vulpen, I Vassilopoulos, N Vegni, G Ventura, L and Venus, W Verbeure, F Verlato, M Vertogradov, LS Verzi, V and Vilanova, D Vlasov, E Vodopyanov, AS Voulgaris, G and Vrba, V Wahlen, H Walck, C Weiser, C Wicke, D and Wickens, JH Willkinson, GR Winter, M Witek, M Wolf, G and Yi, J Yushchenko, O Zalewska, A Zalewski, P and Zavrtanik, D Zevgolatakos, E Zimin, NI Zucchelli, GC and Zumerle, G DELPHI Collaboration
Subjects: High Energy Physics::Experiment
Abstract: Two-particle angular correlations in jet cones have been measured in e(+)e(-) annihilation into hadrons at LEP energies (root s = 91 and 183 GeV) and are compared with QCD predictions using the LPHD hypothesis. Two different functions have been tested. While the differentially normalized correlation function shows substantial deviations from the predictions, a globally normalized correlation function agrees well. The size of alpha(s)(eff) land other QCD parameters) and its running with the relevant angular scale, the validity of LPHD, and problems due to non-perturbative effects are discussed critically. (C) 1998 Elsevier Science B.V. All rights reserved.
Published: 1998

40. AB Doradus C: age, spectral type, orbit, and comparison to evolutionary models.

Author: L. M. Close, J. C. Guirado, B. A. Biller, R. Lenzen, W. Brandner, M. Hartung, and C. Lidman
Published: 2005

41. Telescope and instrument robotization at Dome C

Author: G. Durand, John W. V. Storey, O. Pirnay, Alasdair Allan, A. Pierre, A. Mancini, Rainer Lenzen, L. Agnoletto, Fabio Roncella, François-Xavier Schmider, Alcione Mora, L. Damé, V. Coudé du Foresto, S. Castellini, A. Gröschke, Favio Bortoletto, Tony Travouillon, W. Ansorge, Hans J. Kärcher, Carlos Eiroa, Jean-Tristan Buey, Nicholas F. H Tothill, Massimo Frezzotti, C. Montanari, Iain A. Steele, D. Fappani, Klaus G. Strassmeier, K. Agabi, Runa Briguglio, Hans J. Deeg, Luca Vittuari, T. Granzer, Michael I. Andersen, Marc Weber, Astrophysikalisches Institut Potsdam (AIP), Laboratoire Universitaire d'Astrophysique de Nice (LUAN), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Italian National Program for Research in Antarctica (PNRA), School of Physics and Astronomy [Exeter], University of Exeter, RAMS-CON Management Consultants, INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Dipartimento di Fisica [Roma La Sapienza], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Ingénieurs, Techniciens et Administratifs, Physique solaire, Dipartimento di Fisica e Geologia [Perugia], Università degli Studi di Perugia = University of Perugia (UNIPG), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Astrofisica de Canarias (IAC), Instituto de Física Teórica UAM/CSIC (IFT), Universidad Autónoma de Madrid (UAM)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Société Européenne de Systèmes Optiques (SESO), Ente per le Nuove Technologie, l'Energia e l'Ambiente (ENEA), Centro Ricerche Casaccia, Alfred Wegener Institute for Polar and Marine Research (AWI), MT Mechatronics, Max-Planck-Institut für Aeronomie (MPI Aeronomie), Max-Planck-Gesellschaft, L'Institut polaire français Paul-Emile Victor (IPEV), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), AMOS, Liverpool John Moores University (LJMU), University of New South Wales [Sydney] (UNSW), Cahill Center for Astronomy and Astrophysics, California Institute of Technology (CALTECH), Dipartimento di Ingegneria delle Strutture, dei Trasporti, delle Acque, del Rilevamento, del Territorio (DISTART), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), K.G. Strassmeier, K. Agabi, L. Agnoletto, A. Allan, M. I. Andersen, W. Ansorge, F. Bortoletto, R. Briguglio, J.-T. Buey, S. Castellini, V. Coud´e du Foresto, L. Dam´e, H. J. Deeg, C. Eiroa, G. Durand, D. Fappani, M. Frezzotti, T. Granzer, A. Gr¨oschke, H. J. K¨archer, R. Lenzen, A. Mancini, C. Montanari, A. Mora, A. Pierre, O. Pirnay, F. Roncella, F.-X. Schmider, I. Steele, J.W. V. Storey, N. F. H. Tothill, T. Travouillon, L. Vittuari, and M. Weber, Strassmeier, K. G., Agabi, K., Agnoletto, L., Allan, A., Andersen, M. I., Ansorge, W., Bortoletto, F., Briguglio, R., Buey, J. -T., Castellini, S., Du Foresto, V. C., Dame, L., Deeg, H. J., Eiroa, C., Durand, G., Fappani, D., Frezzotti, M., Granzer, T., Groschke, A., Karcher, H. J., Lenzen, R., Mancini, A., Montanari, C., Mora, A., Pierre, A., Pirnay, O., Roncella, F., Schmider, F. -X., Steele, I., Storey, J. W. V., Tothill, N. F. H., Travouillon, T., Vittuari, L., and Weber, M.
Subjects: Atmospheric effect, 010308 nuclear & particles physics, Site testing, Astronomy and Astrophysics, 01 natural sciences, law.invention, Telescope, ATMOSPHERIC EFFECTS, INSTRUMENTATION: MISCELLANEOUS, Dome (geology), miscellaneou [Instrumentation], Space and Planetary Science, law, SITE TESTING, 0103 physical sciences, TELESCOPES, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Geology, Telescopes, Remote sensing
Abstract: This article reviews the situation for robotization of telescopes and instruments at the Antarctic station Concordia on Dome C. A brain-storming meeting was held in Tenerife in March 2007 from which this review emerged.We describe and summarize the challenges for night-time operations of various astronomical experiments at conditions “between Earth and Space” and conclude that robotization is likely a prerequisite for continuous astronomical data taking during the 2000-hour night at Dome C. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Published: 2007
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42. The Refeeding Syndrome revisited: you can only diagnose what you know.

Author: Janssen G, Pourhassan M, Lenzen-Großimlinghaus R, Jäger M, Schäfer R, Spamer C, Cuvelier I, Volkert D, and Wirth R
Subjects: Adult, Aged, Aged, 80 and over, Clinical Competence, Female, Germany, Health Knowledge, Attitudes, Practice, Humans, Male, Middle Aged, Surveys and Questionnaires, Young Adult, Nutritional Support adverse effects, Physicians statistics & numerical data, Refeeding Syndrome diagnosis
Abstract: Background/objectives: The Refeeding Syndrome (RFS) is a serious complication in patients receiving nutrition support after a period of severe malnutrition. We frequently recognize and diagnose the RFS due to increased awareness. Thus, we observe that many physicians do not know the RFS and that it is rarely diagnosed. The aim of the study was to determine whether physicians in Germany know the RFS., Subjects/methods: A questionnaire with a case vignette about an older person who developed the RFS after initiation of nutritional therapy was submitted to German physicians and fifth year medical students, who were participants of educational lectures., Results: Of the 281 participants who answered the respective question, 40 participants (14%) correctly diagnosed the RFS of the case vignette and 21 participants (8%) gave nearly correct answers. Indeed, the majority of the participants did not diagnose the RFS., Conclusions: Although the RFS may lead to fatal complications, it is unknown to the majority of the queried physicians. Therefore, there is a call to implement the RFS in respective curricula and increase systematic education on this topic.
Published: 2019
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43. Association of anemia with functional and nutritional status in the German multicenter study "GeriAnaemie2013".

Author: Röhrig G, Rücker Y, Becker I, Schulz RJ, Lenzen-Großimlinghaus R, Willschrei P, Gebauer S, Modreker M, Jäger M, and Wirth R
Subjects: Aged, Aged, 80 and over, Anemia, Iron-Deficiency blood, Anemia, Iron-Deficiency diagnosis, Comorbidity, Cross-Sectional Studies, Female, Germany, Hemoglobinometry, Humans, Male, Polypharmacy, Protein-Energy Malnutrition blood, Protein-Energy Malnutrition diagnosis, Protein-Energy Malnutrition epidemiology, Risk Factors, Serum Albumin metabolism, Anemia, Iron-Deficiency epidemiology, Disability Evaluation, Frail Elderly, Nutritional Status
Abstract: Objectives: Anemia and malnutrition are risk factors for frailty in older people but data from multicenter studies among German geriatric inpatients are lacking. This analysis evaluated data from the multicenter study "GerAnaemie2013" commissioned by the German Geriatric Society., Patients and Methods: The study involved an analysis of the 579 geriatric inpatients recruited in the context of the German multicenter study "GeriAnaemie2013". Study parameters: Barthel index (BI), handgrip strength, nutritional data (e.g. loss of appetite, loss of weight and decreased food intake)., Inclusion Criteria: in-patient age ≥70 years, exclusion criteria: current cancer disease or cancer-associated treatment. Anemia was defined according to the World Health Organization (WHO) criteria., Results: The mean age of patients was 81.9 years, overall prevalence of anemia 55.1 %, mean hemoglobin (Hb) level 11.9 g/dl, average BI 50.8 points and 30.3 % of all patients were at risk of malnutrition. While univariate analysis revealed a significantly lower BI in anemic patients, this association was no longer seen in multivariate analysis. Regression analysis revealed that a drug intake of > 5 drugs/day doubles the chance of suffering from anemia with an adjusted odds ratio (OR) of 2.17 (confidence interval (CI) 1.28-3.68, p = 0.004) as well as a serum albumin level below 3.5 g/dl with an adjusted OR of 2.11 (range 1.40-3.19, p < 0.001)., Conclusion: Polymedication and low serum albumin were independent risk factors for anemia in geriatric patients, probably reflecting disease severity.
Published: 2017
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44. Association between hematologic parameters and functional impairment among geriatric inpatients: Data of a prospective cross-sectional multicenter study ("GeriPrävalenz2013").

Author: Röhrig G, Becker I, Schulz RJ, Lenzen-Großimlinghaus R, Willschrei P, Gebauer S, Modreker M, Jäger M, and Wirth R
Subjects: Aged, Aged, 80 and over, Cross-Sectional Studies, Female, Humans, Logistic Models, Male, Prevalence, Prospective Studies, Activities of Daily Living, Anemia epidemiology, Inpatients statistics & numerical data
Abstract: Objectives: Objective of this study was to analyse the association between impairment of Barthel Index items and hematologic parameters in geriatric inpatients., Methods: Patient recruitment of the "GeriPrävalenz2013" study has been described before., Inclusion Criteria: in-patient aged>=70years; exclusion criteria: actual cancer disease or cancer associated treatment. Anemia was defined according to WHO criteria. Physical impairment was assessed by Barthel Index (BI). Association between all 10 items of the BI and hematologic parameters was statistically evaluated., Results: Anemia prevalence was 55.1% (319/579) with BI impairment in 96.2% patients. T-test revealed significant lower BI in anemic patients (47.9 vs 54.3; p=0.004). Binary logistic regression revealed that growing age, reduced MCV, reduced iron levels and reduced Hb levels were associated with increased impairment of several items of the Barthel-Index. Interestingly, increased levels of albumin and folic acid (FA) were associated with increased impairment of BI items., Conclusion: Anemia and lower levels of anemia related parameters showed a negative impact on ADL and physical performance based on BI items. An impaired total BI should result in an analysis of BI subitems, particularly if anemia related laboratory parameters are deviant. Reasons for the negative impact of elevated FA and albumin levels on BI remain speculative., (Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.)
Published: 2016
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45. Effects of Power Training on Mobility and Gait Biomechanics in Old Adults with Moderate Mobility Disability: Protocol and Design of the Potsdam Gait Study (POGS).

Author: Beijersbergen CM, Hortobágyi T, Beurskens R, Lenzen-Grossimlinghaus R, Gäbler M, and Granacher U
Subjects: Biomechanical Phenomena, Cross-Over Studies, Exercise Therapy methods, Humans, Muscle Strength Dynamometer, Muscle, Skeletal physiology, Reproducibility of Results, Torque, Walking physiology, Walking Speed physiology, Gait physiology, Mobility Limitation, Muscle Strength physiology, Resistance Training
Abstract: Background: Walking speed decreases in old age. Even though old adults regularly participate in exercise interventions, we do not know how the intervention-induced changes in physical abilities produce faster walking. The Potsdam Gait Study (POGS) will examine the effects of 10 weeks of power training and detraining on leg muscle power and, for the first time, on complete gait biomechanics, including joint kinematics, kinetics, and muscle activation in old adults with moderate mobility disability., Methods/design: POGS is a randomized controlled trial with two arms, each crossed over, without blinding. Arm 1 starts with a 10-week control period to assess the reliability of the tests and is then crossed over to complete 25-30 training sessions over 10 weeks. Arm 2 completes 25-30 exercise sessions over 10 weeks, followed by a 10-week follow-up (detraining) period. The exercise program is designed to improve lower extremity muscle power. Main outcome measures are: muscle power, gait speed, and gait biomechanics measured at baseline and after 10 weeks of training and 10 weeks of detraining., Discussion: It is expected that power training will increase leg muscle power measured by the weight lifted and by dynamometry, and these increased abilities become expressed in joint powers measured during gait. Such favorably modified powers will underlie the increase in step length, leading ultimately to a faster walking speed. POGS will increase our basic understanding of the biomechanical mechanisms of how power training improves gait speed in old adults with moderate levels of mobility disabilities., (© 2016 S. Karger AG, Basel.)
Published: 2016
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46. Do doctors know how much nutrition patients need--a survey from Germany?

Author: Wirth R, Smoliner C, Spamer C, Marburger C, Schreiber FS, Willschrei HP, Lenzen-Großimlinghaus R, Schäfer R, and Volkert D
Subjects: Data Collection, Enteral Nutrition, Germany, Health Services Needs and Demand, Humans, Clinical Competence, Malnutrition diagnosis, Nutrition Assessment, Nutritional Requirements, Nutritional Status, Physicians
Abstract: For the diagnosis, prevention and therapy of malnutrition, it is important to estimate the energy and fluid requirements of an individual patient. To our knowledge, it is unknown how accurately medical doctors can estimate the energy and fluid requirements of patients in a clinical routine situation. Hence, we conducted the following survey. A written face-to-face survey about the energy and fluid requirements of and tube feeding and fluid recommendations for a typical patient was performed with 179 medical doctors. An estimation error of >15% was defined as relevant. The results revealed substantial variations in estimating the energy and fluid needs of the patient. A total of 25% of the participants underestimated the energy requirements, and 47% of the participants underestimated the fluid requirements. In addition, 68% of the participants recommended a daily dose of tube feeding that was <85% of the reference value. A substantial proportion of medical doctors show a lack of knowledge concerning energy and fluid requirements, which demonstrates a need for better medical education with regard to nutrition.
Published: 2014
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47. Characterization of the transmitted near-infrared wavefront error for the GRAVITY/VLTI Coudé Infrared Adaptive Optics System.

Author: Yang P, Hippler S, Deen CP, Brandner W, Clénet Y, Henning T, Huber A, Kendrew S, Lenzen R, Pfuhl O, and Zhu J
Subjects: Equipment Design, Equipment Failure Analysis, Infrared Rays, Artifacts, Lenses, Telescopes
Abstract: The adaptive optics system for the second-generation VLT-interferometer (VLTI) instrument GRAVITY consists of a novel cryogenic near-infrared wavefront sensor to be installed at each of the four unit telescopes of the Very Large Telescope (VLT). Feeding the GRAVITY wavefront sensor with light in the 1.4 to 2.4 micrometer band, while suppressing laser light originating from the GRAVITY metrology system, custom-built optical components are required. In this paper, we present the development of a quantitative near-infrared point diffraction interferometric characterization technique, which allows measuring the transmitted wavefront error of the silicon entrance windows of the wavefront sensor cryostat. The technique can be readily applied to quantitative phase measurements in the near-infrared regime. Moreover, by employing a slightly off-axis optical setup, the proposed method can optimize the required spatial resolution and enable real time measurement capabilities. The feasibility of the proposed setup is demonstrated, followed by theoretical analysis and experimental results. Our experimental results show that the phase error repeatability in the nanometer regime can be achieved.
Published: 2013
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48. ESPEN Guidelines on Enteral Nutrition: Geriatrics.

Author: Volkert D, Berner YN, Berry E, Cederholm T, Coti Bertrand P, Milne A, Palmblad J, Schneider S, Sobotka L, Stanga Z, Lenzen-Grossimlinghaus R, Krys U, Pirlich M, Herbst B, Schütz T, Schröer W, Weinrebe W, Ockenga J, and Lochs H
Subjects: Aged, Aged, 80 and over, Europe, Humans, Quality of Life, Enteral Nutrition standards, Geriatrics standards, Malnutrition therapy, Practice Patterns, Physicians'
Abstract: Nutritional intake is often compromised in elderly, multimorbid patients. Enteral nutrition (EN) by means of oral nutritional supplements (ONS) and tube feeding (TF) offers the possibility to increase or to insure nutrient intake in case of insufficient oral food intake. The present guideline is intended to give evidence-based recommendations for the use of ONS and TF in geriatric patients. It was developed by an interdisciplinary expert group in accordance with officially accepted standards and is based on all relevant publications since 1985. The guideline was discussed and accepted in a consensus conference. EN by means of ONS is recommended for geriatric patients at nutritional risk, in case of multimorbidity and frailty, and following orthopaedic-surgical procedures. In elderly people at risk of undernutrition ONS improve nutritional status and reduce mortality. After orthopaedic-surgery ONS reduce unfavourable outcome. TF is clearly indicated in patients with neurologic dysphagia. In contrast, TF is not indicated in final disease states, including final dementia, and in order to facilitate patient care. Altogether, it is strongly recommended not to wait until severe undernutrition has developed, but to start EN therapy early, as soon as a nutritional risk becomes apparent.
Published: 2006
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49. A dynamical calibration of the mass-luminosity relation at very low stellar masses and young ages.

Author: Close LM, Lenzen R, Guirado JC, Nielsen EL, Mamajek EE, Brandner W, Hartung M, Lidman C, and Biller B
Abstract: Mass is the most fundamental parameter of a star, yet it is also one of the most difficult to measure directly. In general, astronomers estimate stellar masses by determining the luminosity and using the 'mass-luminosity' relationship, but this relationship has never been accurately calibrated for young, low-mass stars and brown dwarfs. Masses for these low-mass objects are therefore constrained only by theoretical models. A new high-contrast adaptive optics camera enabled the discovery of a young (50 million years) companion only 0.156 arcseconds (2.3 au) from the more luminous (> 120 times brighter) star AB Doradus A. Here we report a dynamical determination of the mass of the newly resolved low-mass companion AB Dor C, whose mass is 0.090 +/- 0.005 solar masses. Given its measured 1-2-micrometre luminosity, we have found that the standard mass-luminosity relations overestimate the near-infrared luminosity of such objects by about a factor of approximately 2.5 at young ages. The young, cool objects hitherto thought to be substellar in mass are therefore about twice as massive, which means that the frequency of brown dwarfs and planetary mass objects in young stellar clusters has been overestimated.
Published: 2005
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50. A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way.

Author: Schödel R, Ott T, Genzel R, Hofmann R, Lehnert M, Eckart A, Mouawad N, Alexander T, Reid MJ, Lenzen R, Hartung M, Lacombe F, Rouan D, Gendron E, Rousset G, Lagrange AM, Brandner W, Ageorges N, Lidman C, Moorwood AF, Spyromilio J, Hubin N, and Menten KM
Abstract: Many galaxies are thought to have supermassive black holes at their centres-more than a million times the mass of the Sun. Measurements of stellar velocities and the discovery of variable X-ray emission have provided strong evidence in favour of such a black hole at the centre of the Milky Way, but have hitherto been unable to rule out conclusively the presence of alternative concentrations of mass. Here we report ten years of high-resolution astrometric imaging that allows us to trace two-thirds of the orbit of the star currently closest to the compact radio source (and massive black-hole candidate) Sagittarius A*. The observations, which include both pericentre and apocentre passages, show that the star is on a bound, highly elliptical keplerian orbit around Sgr A*, with an orbital period of 15.2 years and a pericentre distance of only 17 light hours. The orbit with the best fit to the observations requires a central point mass of (3.7 +/- 1.5) x 10(6) solar masses (M(*)). The data no longer allow for a central mass composed of a dense cluster of dark stellar objects or a ball of massive, degenerate fermions.
Published: 2002
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