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1. An investigation of the very rare $ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $ decay

Author: H. O. Danielsson, Luca Pontisso, L. Federici, P. F. Dalpiaz, R. Marchevski, E. Gamberini, Jürgen Engelfried, A. Sturgess, Vladimir Ryjov, J. B. Dainton, Antonino Sergi, Paul Laycock, Fabrizio Petrucci, M. Medvedeva, Giuseppe Ruggiero, T. Numao, Paolo Valente, D. E. Hutchcroft, F. Marchetto, M. Lenti, M. Perrin-Terrin, D. Lomidze, Piero Vicini, O. Yushchenko, L. Peruzzo, S. Martellotti, A. Mapelli, V. Palladino, F. Costantini, P. Lubrano, P. Lichard, B. Angelucci, B. Bloch-Devaux, L. Bician, Leander Litov, G. Lanfranchi, V. Obraztsov, L. Iacobuzio, E. B. Holzer, S. Giudici, P. Rubin, J. R. Fry, Tommaso Spadaro, R. Piandani, A. Fucci, Roberta Arcidiacono, F. Hahn, Vladimir Kekelidze, V. Kurshetsov, Georgi P. Georgiev, E. Cortina Gil, D. Emelyanov, V. E. Semenov, Dave Britton, Mattia Barbanera, Viacheslav Duk, N. De Simone, S. Kholodenko, E. Gushchin, M. Boretto, G. Lehmann Miotto, C. Graham, E. Maurice, S. Movchan, C. Lazzeroni, A. Ceccucci, E. Iacopini, V. Falaleev, B. Checcucci, L. Di Lella, Roberto Ammendola, F. Ambrosino, Andrea Bizzeti, Babette Döbrich, P. Cooper, G. D'Agostini, B. Velghe, J. Carmignani, E. Minucci, M. Sozzi, V. Cerny, Claudio Santoni, M. Pepe, Johannes Bernhard, E. Pedreschi, Andrea Biagioni, R. Volpe, C. J. Parkinson, S. Padolski, F. Newson, S. Shkarovskiy, M. Fiorini, R. Page, A. Filippi, A. I. Zinchenko, J. Fu, Rainer Wanke, O. Hutanu, A. Mefodev, H. D. Wahl, Yu. Potrebenikov, Francesco Gonnella, R. Fantechi, B. Wrona, A. Parenti, A. Salamon, L. Gatignon, J. Jerhot, Giuseppe Latino, M. Mirra, Z. Kucerova, I. Mannelli, N. Estrada-Tristan, G. Saracino, D. Coward, F. Brizioli, M. Koval, F. Spinella, T. Capussela, Evgueni Goudzovski, A. Gianoli, Mauro Piccini, Roberto Guida, S. Venditti, A. Shaikhiev, Tomas Blazek, A. Romano, Fausto Sargeni, Paolo Massarotti, R. Lollini, Ilaria Neri, Vincenzo Bonaiuto, G. Anzivino, Yu.A. Kudenko, T. Enik, Tomáš Husek, Douglas Bryman, Sergei Fedotov, A P Ostankov, V. Sugonyaev, F. Bucci, A. Cotta Ramusino, V. Kozhuharov, Milena Misheva, V. Kurochka, Ernesto Migliore, M. Zamkovsky, Matthew Noy, Mauro Raggi, E. Lari, R. W. L. Jones, D. T. Madigozhin, G. Khoriauli, M. Corvino, Alessandro Lonardo, M. Vormstein, T. Bache, Emilio Leonardi, S. Ghinescu, S. Schuchmann, R. Aliberti, A. Norton, Matteo Lupi, A. Antonelli, Helen F Heath, I. Polenkevich, D. Soldi, P. Cenci, Cristina Biino, K. Massri, A. M. Bragadireanu, B. Jenninger, D. Protopopescu, E. Menichetti, Nicolas Lurkin, M. B. Brunetti, J. Kunze, L. Fulton, F. Duval, Mario Giorgi, D. Di Filippo, M. Moulson, V. Fascianelli, P. Petrov, D. Baigarashev, A. Khotyantsev, Karol Kampf, E. Imbergamo, Jacopo Pinzino, G. Lamanna, N. Doble, A. Kleimenova, N. A. Molokanova, M. Napolitano, C. Cerri, S. Trilov, A. Korotkova, A. Baeva, J. Swallow, A. Conovaloff, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and European Project: 268062,EC:FP7:ERC,ERC-2010-AdG_20100224,UNIVERSALEPTO(2011)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Physics beyond the Standard Model, Flavour Changing Neutral Currents, 01 natural sciences, Standard Model, Flavor physics, Fixed target experiments, Rare decay, 0103 physical sciences, Pi, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Sensitivity (control systems), 010306 general physics
Abstract: The NA62 experiment reports an investigation of the $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ K + → π + ν ν ¯ mode from a sample of K+ decays collected in 2017 at the CERN SPS. The experiment has achieved a single event sensitivity of (0.389 ± 0.024) × 10−10, corresponding to 2.2 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. Two signal candidates are observed with an expected background of 1.5 events. Combined with the result of a similar analysis conducted by NA62 on a smaller data set recorded in 2016, the collaboration now reports an upper limit of 1.78 × 10−10 for the $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ K + → π + ν ν ¯ branching ratio at 90% CL. This, together with the corresponding 68% CL measurement of ($$ {0.48}_{-0.48}^{+0.72} $$ 0.48 − 0.48 + 0.72 ) × 10−10, are currently the most precise results worldwide, and are able to constrain some New Physics models that predict large enhancements still allowed by previous measurements.
Published: 2020
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2. Searches for lepton number violating $K^+$ decays

Author: Tomáš Husek, D. T. Madigozhin, A. Sturgess, J. B. Dainton, Matteo Lupi, P. F. Dalpiaz, R. Marchevski, E. Gamberini, Jürgen Engelfried, T. Bache, G. Latino, Claudio Santoni, A. Filippi, A. I. Zinchenko, M. Medvedeva, J. R. Fry, E. Maurice, T. Capussela, A. Gianoli, Alessandro Lonardo, E. Cortina Gil, Roberto Piandani, Giuseppe Ruggiero, H. O. Danielsson, Roberto Guida, V. Kurochka, Luca Pontisso, M. Piccini, Yu. Potrebenikov, G. Lehmann Miotto, A. Kleimenova, Vladimir Ryjov, L. Federici, C. Graham, F. Bucci, D. Coward, B. Velghe, J. Carmignani, M. Boretto, L. Di Lella, Tommaso Spadaro, M. Vormstein, S. Schuchmann, V. Falaleev, M. Misheva, F. Costantini, N. Doble, Babette Döbrich, G. Mannocchi, G. D'Agostini, M. Pepe, A. Mapelli, B. Wrona, S. Giudici, P. Cenci, Fabrizio Petrucci, G. Saracino, O. Hutanu, C. J. Parkinson, David Hutchcroft, Emilio Leonardi, P. Rubin, Leander Litov, V. Kozhuharov, I. Polenkevich, M. Zamkovsky, A. Salamon, G. Khoriauli, Antonino Sergi, A. Romano, Fausto Sargeni, G. Anzivino, A. Mefodev, I. Mannelli, A P Ostankov, M. Koval, E. Iacopini, F. Brizioli, Roberta Arcidiacono, E. Gushchin, P. Lubrano, T. Numao, Paolo Valente, Matthew Noy, R. W. L. Jones, M. Perrin-Terrin, M. Sozzi, Helen F Heath, Ilaria Neri, Y. Petrov, F. Hahn, Johannes Bernhard, Vincenzo Bonaiuto, T. Enik, Douglas Bryman, Sergei Fedotov, M. Lenti, F. Newson, N. A. Molokanova, R. Fantechi, N. De Simone, E. Pedreschi, G. Lamanna, S. Shkarovskiy, V. Palladino, A. Parenti, F. Spinella, A. Korotkova, A. Fucci, R. Lollini, Evgueni Goudzovski, M. Napolitano, E. Minucci, Georgi P. Georgiev, Viacheslav Duk, M. Mirra, F. Marchetto, Piero Vicini, Ernesto Migliore, C. Cerri, P. Lichard, A. M. Bragadireanu, S. Trilov, Roberto Ammendola, Cristina Biino, Mauro Raggi, B. Jenninger, S. Movchan, C. Lazzeroni, F. Ambrosino, M. Moulson, V. Fascianelli, Karol Kampf, V. Sugonyaev, Mario Giorgi, D. Di Filippo, L. Gatignon, S. Padolski, M. Corvino, D. Protopopescu, L. Bician, J. Swallow, Nicolas Lurkin, M. B. Brunetti, R. Aliberti, A. Norton, Andrea Biagioni, R. Volpe, A. Conovaloff, J. Kunze, M. Fiorini, D. Lomidze, O. Yushchenko, V. Kurshetsov, S. Kholodenko, B. Checcucci, P. Cooper, Paolo Massarotti, Rainer Wanke, E. Lari, A. Shaikhiev, Francesco Gonnella, Vladimir Kekelidze, Tomas Blazek, Mattia Barbanera, A. Cotta Ramusino, Jacopo Pinzino, S. Martellotti, V. Obraztsov, B. Angelucci, L. Iacobuzio, E. B. Holzer, Dave Britton, N. Estrada-Tristan, V. E. Semenov, A. Ceccucci, R. Page, Andrea Bizzeti, J. Jerhot, P. Petrov, H. D. Wahl, V. Cerny, E. Menichetti, A. Khotyantsev, D. Soldi, K. Massri, L. Fulton, F. Duval, Yu. G. Kudenko, A. Antonelli, L. Peruzzo, J. L. Fu, B. Bloch-Devaux, E. Imbergamo, S. Venditti, Z. Kucerova, Paul Laycock, S. Ghinescu, G. Lanfranchi, Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), NA62, European Commission, Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Ambrosino, F., Capussela, T., Corvino, M., Di Filippo, D., Massarotti, P., Mirra, M., Napolitano, M., Saracino, G., and UCL - SST/IRMP - Institut de recherche en mathématique et physique
Subjects: branching ratio: upper limit, K+: rare decay, NA62 experiment, 01 natural sciences, NA62, Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, electron: pair production, High Energy Physics - Experiment (hep-ex), Economica, K+: branching ratio, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], K meson decay, Physics, Large Hadron Collider, Electroweak interaction, lcsh:QC1-999, muon: pair production, lepton number violation, K+: semileptonic decay, K+: secondary beam, Particle Physics - Experiment, Nuclear and High Energy Physics, Particle physics, CERN Lab, S010.46, FOS: Physical sciences, kaons, S010:Desig=46, +pi-+2muon%2B%22">K+ --> pi- 2muon+, Partícules (Física nuclear), PE2_2, Violació CP (Física nuclear), 0103 physical sciences, Kaon decays, lepton number violation, K meson, K meson decay, 010306 general physics, lepton number: violation, Kaon decays, Lepton Number Violation, hep-ex, 010308 nuclear & particles physics, S010:Desig=19, CERN SPS, K meson, Lepton number, +pi-+electron+positron%22">K+ --> pi- electron positron, Kaon Physics, Lepton Flavour Violation, S010.19, lcsh:Physics, experimental results
Abstract: The NA62 experiment at CERN reports a search for the lepton number violating decays K+ -> pi(-)e(+)e(+) and K+ -> pi(-)mu(+)mu(+) using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2 x 10(-10) and 4.2 x 10(-11) are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively., It is a pleasure to express our appreciation to the staff of the CERN laboratory and the technical staffs of the participating laboratories and universities for their efforts in the operation of the experiment and data processing. The cost of the experiment and its auxiliary systems was supported by the funding agencies of the Collaboration Institutes. We are particularly indebted to: F.R.S.-FNRS (Fonds De La Recherche Scientifique - FNRS), Belgium; BMES (Ministry of Education, Youth and Science), Bulgaria; NSERC (Natural Sciences and Engineering Research Council), Canada; NRC (National Research Council Canada) contribution to TRIUMF, Canada; MEYS (Ministry of Education, Youth and Sports), Czech Republic; BMBF (Bundesministerium für Bildung und Forschung) contracts 05H12UM5, 05H15UMCNA and 05H18UMCNA, Germany; INFN (Istituto Nazionale di Fisica Nucleare), Italy; MIUR (Ministero dell'Istruzione, dell'Università e della Ricerca), Italy; CONACyT (Consejo Nacional de Ciencia y Tecnología), Mexico; IFA (Institute of Atomic Physics), Romania; INR-RAS (Institute for Nuclear Research of the Russian Academy of Sciences), Moscow, Russia; JINR (Joint Institute for Nuclear Research), Dubna, Russia; NRC (National Research Center) “Kurchatov Institute” and MESRF (Ministry of Education and Science of the Russian Federation), Russia; MESRS (Ministry of Education, Science, Research and Sport of the Slovak Republic), Slovakia; CERN (European Organization for Nuclear Research), Switzerland; STFC (Science and Technology Facilities Council), United Kingdom; NSF (National Science Foundation) Award Number 1506088, U.S.A.; ERC (European Research Council) “UniversaLepto” advanced grant 268062, “KaonLepton” starting grant 336581, Europe. Individuals have received support from: Charles University Research Center (UNCE/SCI/013), Czech Republic; Ministry of Education, Universities and Research (MIUR “Futuro in ricerca 2012” grant RBFR12JF2Z, Project GAP), Italy; Russian Foundation for Basic Research (RFBR grants 18-32-00072, 18-32-00245), Russia; the Royal Society (grants UF100308, UF0758946), United Kingdom; STFC (Rutherford fellowships ST/J00412X/1, ST/M005798/1), United Kingdom; ERC (grants 268062, 336581 and starting grant 802836 “AxScale”).
Published: 2019
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3. Search for lepton flavour violation in Z$^0$ decays

Author: J. Y. Liao, M. Möller, Emilio Leonardi, J. Schütte, H. F. Chen, Y. Mi, C. Dionisi, R. Bock, H. R. Gustafson, Pablo Garcia-Abia, Ren-Yuan Zhu, Alain Hervé, M. Fabre, J. M. Salicio, An.A. Vorobyov, Luciano Barone, E. Valente, A. Bay, L. Baksay, S. X. Wu, F. Bruyant, G. Chiefari, D. Duchesneau, T. Angelov, T. Matsuda, S. C. Tonwar, Sc Yeh, R. Mount, Georgi Sultanov, S. Shevchenko, Carlo Civinini, M. Maolinbay, D. McNally, J.F. Li, G. Raven, T. S. Dai, Q.Y. Yang, R. A. Khan, K. Lanius, Jianming Qian, G. Hu, F. Behner, R.B. Sutton, D. DiBitonto, G. Fernandez, L. Romero, H. Suter, Ph. Rosselet, O. Adriani, Frank Filthaut, X.G. Li, Lucas Taylor, Thomas Ferguson, Dimitri Bourilkov, M. Aguilar-Benitez, Herwig Schopper, E. Dénes, V. Commichau, H. J. Schreiber, Valentin V. Khoze, M. Steuer, G. Forconi, J. Weber, M. Bourquin, X. Leytens, G. Viertel, C-Q. Li, V. P. Andreev, E. Brambilla, C. Neyer, G.J. Bobbink, R. Bizzarri, A. Hasan, F. DeNotaristefani, D. Pandoulas, T. McMahon, L. Leistam, N. E. Moulai, M. Chemarin, P. Berges, M. White, Carlos Willmott, R. Leiste, L. Antonov, Marta Felcini, D. Perret-Gallix, K. Strauch, M. Fukushima, A. A. Syed, Speranza Falciano, M. J. Glaubman, Y. D. Xu, Z. F. Gong, Francesco Becattini, M. Capell, J. Krizmanic, Hans J. Vogel, S. Morganti, G. M. Chen, Y. F. Wang, H. T. Li, R.J. Wu, M. Sachwitz, V.R. Krastev, E. Gonzalez, B. Monteleoni, F. Sticozzi, B. N. Jin, B.C. Stringfellow, R. Barillère, G. Sauvage, H. Nowak, M. Yzerman, F. Crijns, Petr Levchenko, S. Röhner, S. Lanzano, Bernardo Adeva, H. El Mamouni, J. Behrens, T. Spickermann, P. J. Li, P. Schmitz, J. Schwenke, X. Y. Cui, E. Fiandrini, L. Martinez-Laso, C. Spartiotis, F. Wittgenstein, P. Lebrun, Jun Guo, B. Lindemann, Wolfgang Stoeffl, L. Ludovici, M. Chmeissani, R. Liu, M. Bocciolini, P. Arce, A. Arefiev, K. Freudenreich, S. S. Gau, T. J. Wenaus, G. Finocchiaro, BT Bouwens, Giovanni Ambrosi, E. Drago, L. Niessen, G. Schwering, H.R. Dimitrov, R. Morand, Z. L. Xue, J. M. Le Goff, G. S. Sanders, Howard A. Stone, Harvey B Newman, G. Herten, Marcel Merk, Aa Vorobyov, Yu. Kamyshkov, J. Perrier, W. Wallraff, T. Driever, D. Goujon, P.V.K.S. Baba, D. Linnhofer, H. L. Zhuang, Bernard Ille, K. Hilgers, Q. Fan, M. S. Sarakinos, J. D. Burger, G. Rahal-Callot, P. G. Seiler, Mw Gruenewald, J. A. Rubio, P. Vikas, Qiang Li, R. Malik, W. Friebel, O. Rind, G. B. Mills, O. Fackler, Vincenzo Innocente, M. N. Kienzle-Focacci, R. Rosmalen, U. Uwer, A. Chen, J. Salicio, M. Vivargent, Federico Carminati, J. M. Lubbers, M.L. Chen, S. Banerjee, M. Caria, L. Urbán, Roberto Battiston, Hafeez R. Hoorani, F. Marzano, K. Schultze, E. Tarkovsky, C. G. Yang, A. Gordeev, R. Magahiz, C. Maña, D. Lanske, Y. H. Chang, A. Sopczak, G. Coignet, W. Krenz, J. D. Swain, U. Herten, Jiunn-Wei Chen, Marcella Diemoz, Wen-Gan Ma, Peter Denes, I. C. Brock, Raffaello D'Alessandro, K. S. Kumar, B. Borgia, Igor Vorobiev, J. Ulbricht, C. Grinnell, D. Z. Shen, M. Hebert, R. Sehgal, Zhuoxiang Ren, J. A. Bakken, Paolo Bagnaia, Bolek Wyslouch, Qian Wang, M. Pauluzzi, M. Wadhwa, D. J. Schotanus, U. K. Chaturvedi, S. Schulte, Y. S. Lu, Samuel C.C. Ting, J. M. You, Steven Goldfarb, Alberto Aloisio, G. Von Dardel, A. Degré, W. Kittel, D. Antreasyan, K. Schmiemann, A. Savin, K. Sudhakar, Marco Meschini, Qi An, A. Ricker, N. Produit, L. Z. Sun, P. McBride, G. M. Bilei, G. A. Yang, V. Lalieu, D. P. Stickland, Kajari Mazumdar, A. Malinin, Jérôme Rose, G. Passaleva, J. H. Field, H. Anderhub, C. Y. Chien, P. Marchesini, Leonardo Merola, Ming Zeng, C. F. He, Panos A Razis, Th. Meinholz, I. Clare, J. Busenitz, S. Khokhar, D. Gele, X. J. Yan, S. Müller, Y. Mir, C. H. Ye, V. Plyaskin, X. L. Wang, E. Nagy, Yuehong Xie, Christopher George Tully, X. W. Tang, M. Röhner, V. Koutsenko, Christine Buisson, H. Janssen, K.S. Yang, L.S. Hsu, P. Göttlicher, I. Sheer, P. A. Piroué, P. Duinker, Xd Cai, Z. M. Wang, Wolfgang Lohmann, H. Vogt, T. Azemoon, M. Schneegans, D. M. Lee, George Alverson, Tariq Aziz, A. Pevsner, B. Bertucci, J.P. Burq, Y.F. Mao, R. T. Van de Walle, J. B. Ye, Jozsef Toth, M. T. Dova, J. Lettry, Claudio Luci, P. Blömeke, Nicanor Colino, Vineet Kumar, Stéphane Jézéquel, P. Zemp, Elisabetta Gallo, A. Kasser, Guofan Hu, H. O. Cohn, Barry Blumenfeld, R. de Asmundis, L. Li, I. Scott, Chenliang Wang, S. Patricelli, F. Ferroni, Y. Zeng, S. Reucroft, Marcos Cerrada, A. Klimentov, Valery Schegelsky, Antonino Zichichi, A. C. Weber, J. G. Branson, S. Shotkin, Crisostomo Sciacca, Ph Fisher, Marco Pieri, C. Rippich, H. Rykaczewski, Z. W. Yin, S. N. Ganguli, Simonetta Gentile, J. Berdugo, Y. Karyotakis, Atul Gurtu, K. Deiters, Zhen Zhang, B. P. Roe, Q. Ye, Kenneth Francis Read, D. Hauschildt, A. Bujak, Oliver Kornadt, M. Pohl, Yu. Galaktionov, J. Alcaraz, G. Mirabelli, Attilio Santocchia, Jean Fay, M. Dhina, D. Boutigny, K. Lübelsmeyer, Piero Spillantini, Z. Y. Lin, Z.Q. Yang, J.H. Wang, Cheng Chen, W. J. Burger, Zhongyukun Xu, P. K. Malhotra, H. A. Rizvi, A. Kunin, Lamberto Luminari, A. Böhm, C. Zaccardelli, W. W. Kinnison, L. J. Gutay, U. Becker, W. J. Metzger, D. Kirby, M. Guanziroli, R. C. Ball, Pierre Lecomte, I. Duran, F. L. Linde, G. Sartorelli, J. P. Martin, E. Shumilov, Charles Timmermans, F. J. Eppling, L. W. Jones, D. S. Yan, S. M. Ting, V. Shoutko, W. Y. Chen, M. Tonutti, F. Plasil, Mingshui Chen, Adrian Biland, G. Gratta, K.D. Shmakov, S. J. Fan, D. Ren, U. Vikas, A. Contin, A. Engler, H. S. Fesefeldt, R. Weill, M. Lenti, A. L. Anderson, Ying Wu, J. F. Zhou, M. MacDermott, T. Kramer, M. A. Niaz, J. J. Blaising, P. Extermann, H. Haan, I. Leedom, B. Z. Yang, Mariagrazia Alviggi, H. Hofer, K. L. Tung, I. Vetlitsky, Egidio Longo, J.C. Sens, M. M. Ilyas, G. Landi, Simone Paoletti, Manjit Kaur, H. Akbari, Daqiang Zhang, Y. J. Pei, D.W. Schmitz, G.G.G. Massaro, D.N. Mao, Robert Clare, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Gailloud, M. Napolitano, S. Kirsch, E. Soderstrom, H. S. Chen, L. Servoli, D. Wright, R. Fabbretti, S. L. Wu, X. R. Shi, Felicitas Pauss, S. Rosier-Lees, P. Le Coultre, Zheng Wang, Yanwen Liu, Sabine Riemann, K. N. Qureshi, R. Starosta, D. Luckey, Gy L. Bencze, Reinhard W. Schulte, A. M. Cartacci, S. Beingessner, R. Raghavan, J. Mnich, A. C. König, Y.P. Tong, F. C. Erné, Laurent Vuilleumier, A. Rubbia, T. Foreman, J. Bao, R. L. Sumner, G. H. Wang, J. Wenninger, V. Pojidaev, Nikita Smirnov, B. L. Betev, G. Morand, F. Cesaroni, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, B., Adeva, O., Adriani, M., Aguilarbenitez, H., Akbari, J., Alcaraz, Aloisio, Alberto, G., Alverson, Alviggi, Mariagrazia, G., Ambrosi, Q., An, H., Anderhub, A. L., Anderson, V. P., Andreev, T., Angelov, L., Antonov, D., Antreasyan, P., Arce, A., Arefiev, T., Azemoon, T., Aziz, P. V., K., P., Bagnaia, J. A., Bakken, L., Baksay, R. C., Ball, S., Banerjee, J., Bao, R., Barillere, L., Barone, R., Battiston, A., Bay, F., Becattini, U., Becker, F., Behner, J., Behren, S., Beingessner, G. L., Bencze, J., Berdugo, P., Berge, B., Bertucci, B. L., Betev, A., Biland, G. M., Bilei, R., Bizzarri, J. J., Blaising, P., Blomeke, B., Blumenfeld, G. J., Bobbink, M., Bocciolini, R., Bock, A., Bohm, B., Borgia, D., Bourilkov, M., Bourquin, D., Boutigny, B., Bouwen, E., Brambilla, J. G., Branson, I. C., Brock, F., Bruyant, C., Buisson, A., Bujak, J. D., Burger, W., Burger, J. P., Burq, J., Busenitz, X. D., Cai, M., Capell, M., Caria, F., Carminati, A. M., Cartacci, M., Cerrada, F., Cesaroni, Y. H., Chang, U. K., Chaturvedi, M., Chemarin, A., Chen, C., Chen, G. M., Chen, H. F., Chen, H. S., Chen, J., Chen, M., Chen, M. L., Chen, W. Y., Chen, Chiefari, Giovanni, C. Y., Chien, M., Chmeissani, C., Civinini, I., Clare, R., Clare, H. O., Cohn, G., Coignet, N., Colino, V., Commichau, A., Contin, F., Crijn, X. Y., Cui, T. S., Dai, R., Dalessandro, R., Deasmundi, A., Degre, K., Deiter, E., Dene, P., Dene, F., Denotaristefani, M., Dhina, D., Dibitonto, M., Diemoz, H. R., Dimitrov, C., Dionisi, M. T., Dova, E., Drago, T., Driever, D., Duchesneau, P., Duinker, I., Duran, H., Elmamouni, A., Engler, F. J., Eppling, F. C., Erne, P., Extermann, R., Fabbretti, M., Fabre, S., Falciano, Q., Fan, S. J., Fan, O., Fackler, J., Fay, M., Felcini, T., Ferguson, G., Fernandez, F., Ferroni, H., Fesefeldt, E., Fiandrini, J., Field, F., Filthaut, G., Finocchiaro, P. H., Fisher, G., Forconi, T., Foreman, K., Freudenreich, W., Friebel, M., Fukushima, M., Gailloud, Y., Galaktionov, E., Gallo, S. N., Ganguli, P., Garciaabia, S. S., Gau, D., Gele, S., Gentile, M., Glaubman, S., Goldfarb, Z. F., Gong, E., Gonzalez, A., Gordeev, P., Gottlicher, D., Goujon, G., Gratta, C., Grinnell, M., Gruenewald, M., Guanziroli, J. K., Guo, A., Gurtu, H. R., Gustafson, L. J., Gutay, H., Haan, A., Hasan, D., Hauschildt, C. F., He, T., Hebbeker, M., Hebert, G., Herten, U., Herten, A., Herve, K., Hilger, H., Hofer, H., Hoorani, L. S., Hsu, G., Hu, G. Q., Hu, B., Ille, M. M., Ilya, V., Innocente, H., Janssen, S., Jezequel, B. N., Jin, L. W., Jone, A., Kasser, R. A., Khan, Y., Kamyshkov, Y., Karyotaki, M., Kaur, S., Khokhar, V., Khoze, M. N., Kienzlefocacci, W., Kinnison, D., Kirkby, S., Kirsch, W., Kittel, A., Klimentov, A. C., Konig, O., Kornadt, V., Koutsenko, R. W., Kraemer, T., Kramer, V. R., Krastev, W., Krenz, J., Krizmanic, K. S., Kumar, V., Kumar, A., Kunin, V., Lalieu, G., Landi, K., Laniu, D., Lanske, S., Lanzano, P., Lebrun, P., Lecomte, P., Lecoq, P., Lecoultre, D., Lee, I., Leedom, J. M., Legoff, L., Leistam, R., Leiste, M., Lenti, E., Leonardi, J., Lettry, P. M., Levchenko, X., Leyten, C., Li, H. T., Li, J. F., Li, L., Li, P. J., Li, Q., Li, X. G., Li, J. Y., Liao, Z. Y., Lin, F. L., Linde, B., Lindemann, D., Linnhofer, R., Liu, Y., Liu, W., Lohmann, E., Longo, Y. S., Lu, J. M., Lubber, K., Lubelsmeyer, C., Luci, D., Luckey, L., Ludovici, L., Luminari, W. G., Ma, M., Macdermott, R., Magahiz, P. K., Malhotra, R., Malik, A., Malinin, C., Mana, D. N., Mao, Y. F., Mao, M., Maolinbay, P., Marchesini, J. P., Martin, L., Martinezlaso, F., Marzano, G. G., G., T., Matsuda, K., Mazumdar, P., Mcbride, T., Mcmahon, D., Mcnally, T., Meinholz, M., Merk, Merola, Leonardo, M., Meschini, W. J., Metzger, Y., Mi, G. B., Mill, Y., Mir, G., Mirabelli, J., Mnich, M., Moller, B., Monteleoni, G., Morand, R., Morand, S., Morganti, N. E., Moulai, R., Mount, S., Muller, E., Nagy, Napolitano, Marco, H., Newman, C., Neyer, M. A., Niaz, L., Niessen, H., Nowak, D., Pandoula, M., Pauluzzi, F., Pau, F., Plasil, G., Passaleva, S., Paoletti, Patricelli, Sergio, Y. J., Pei, D., Perretgallix, J., Perrier, A., Pevsner, M., Pieri, P. A., Piroue, V., Plyaskin, M., Pohl, V., Pojidaev, N., Produit, J. M., Qian, K. N., Qureshi, R., Raghavan, G., Rahalcallot, G., Raven, P., Razi, K., Read, D., Ren, Z., Ren, S., Reucroft, A., Ricker, S., Riemann, O., Rind, C., Rippich, H. A., Rizvi, B. P., Roe, M., Rohner, S., Rohner, L., Romero, J., Rose, S., Rosierlee, R., Rosmalen, P., Rosselet, A., Rubbia, J. A., Rubio, H., Rykaczewski, M., Sachwitz, J., Salicio, J. M., Salicio, G., Sander, A., Santocchia, M. S., Sarakino, G., Sartorelli, G., Sauvage, A., Savin, V., Schegelsky, K., Schmiemann, D., Schmitz, P., Schmitz, M., Schneegan, H., Schopper, D. J., Schotanu, S., Shotkin, H. J., Schreiber, R., Schulte, S., Schulte, K., Schultze, J., Schutte, J., Schwenke, G., Schwering, Sciacca, Crisostomo, I., Scott, R., Sehgal, P. G., Seiler, J. C., Sen, L., Servoli, I., Sheer, D. Z., Shen, S., Shevchenko, X. R., Shi, K., Shmakov, V., Shoutko, E., Shumilov, N., Smirnov, E., Soderstrom, A., Sopczak, C., Spartioti, T., Spickermann, P., Spillantini, R., Starosta, M., Steuer, D. P., Stickland, F., Sticozzi, W., Stoeffl, H., Stone, K., Strauch, B. C., Stringfellow, K., Sudhakar, G., Sultanov, R. L., Sumner, L. Z., Sun, H., Suter, R. B., Sutton, J. D., Swain, A. A., Syed, X. W., Tang, E., Tarkovsky, L., Taylor, C., Timmerman, S. C., C., S. M., Ting, Y. P., Tong, M., Tonutti, S. C., Tonwar, J., Toth, C., Tully, K. L., Tung, J., Ulbricht, L., Urban, U., Uwer, E., Valente, R. T., Vandewalle, I., Vetlitsky, G., Viertel, P., Vika, U., Vika, M., Vivargent, H., Vogel, H., Vogt, G., Vondardel, I., Vorobiev, A. A., Vorobyov, L., Vuilleumier, M., Wadhwa, W., Wallraff, C. R., Wang, G. H., Wang, J. H., Wang, Q. F., Wang, X. L., Wang, Y. F., Wang, Z., Wang, Z. M., Wang, A., Weber, J., Weber, R., Weill, T. J., Wenau, J., Wenninger, M., White, C., Willmott, F., Wittgenstein, D., Wright, R. J., Wu, S. L., Wu, S. X., Wu, Y. G., Wu, B., Wyslouch, Y. Y., Xie, Y. D., Xu, Z. Z., Xu, Z. L., Xue, D. S., Yan, X. J., Yan, B. Z., Yang, C. G., Yang, G., Yang, K. S., Yang, Q. Y., Yang, Z. Q., Yang, C. H., Ye, J. B., Ye, Q., Ye, S. C., Yeh, Z. W., Yin, J. M., You, M., Yzerman, C., Zaccardelli, P., Zemp, M., Zeng, Y., Zeng, D. H., Zhang, Z. P., Zhang, J. F., Zhou, R. Y., Zhu, H. L., Zhuang, A., Zichichi, and IHEF (IoP, FNWI)
Subjects: Nuclear and High Energy Physics, Particle physics, Large electron positron collider, Flavour, 01 natural sciences, BHABHA SCATTERING, MONTE-CARLO, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], RADIATIVE-CORRECTIONS, Z0, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, Boson, HIGH-ENERGIES, Physics, 010308 nuclear & particles physics, ELECTROWEAK PARAMETERS, Física, MODEL, Lepton flavour violation, PHOTON CORRECTIONS, TAU, Particle Physics - Experiment, Lepton
Abstract: We have searched for lepton flavour violation in Z0 boson decays into lepton pairs, Z0→μτ, Z0→eτ, and Z0→eμ. The data sample is based on an integrated luminosity of 10.4 pb-1 corresponding to 370 000 Z0’s produced. We obtain upper limits on the branching ratios of 4.8 X 10-5 for the μτ 3.4 X 10-5 for the eτ and 2.4 X 10-5 for the eμ decay modes at the 95% confidence level., Facultad de Ciencias Exactas
Published: 1991
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4. Search for neutralinos in Z decays

Author: H. A. Rizvi, A. Kunin, Y. J. Pei, R. Timellini, Hafeez R Hoorani, Chenjie Gu, W. J. Metzger, S. Goldfarb, J. T. He, F. L. Linde, A. Pevsner, Konrad Deiters, R. Barillère, C. Leggett, R. Leiste, Christoph Paus, Dimitri Bourilkov, T. Angelescu, E. Lieb, M. Guanziroli, Alberto Aloisio, A. Ricker, S. Pensotti, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Giovanni Organtini, N. E. Moulai, S. Chung, J. Casaus, Yu. Kamyshkov, P.V.K.S. Baba, Attilio Santocchia, Jean Fay, D. Boutigny, Nicolas Produit, E. Fiandrini, J. M. You, Luca Malgeri, P. Laurikainen, Egidio Longo, H. Tuchscherer, Yu. Galaktionov, S. Röhner, Pierluigi Paolucci, M. Gailloud, J. P. Martin, J. Alcaraz, X. W. Tang, I. Sheer, P. A. Piroué, B. Zhou, C. G. Yang, A. Koulbardis, G. Sauvage, B. C.C. van der Zwaan, B. Monteleoni, F. Sticozzi, F. Wittgenstein, L. Ludovici, E. Drago, J. P. Ernenwein, P. de Jong, Tariq Aziz, V. Shoutko, R. Ostonen, A. Marin, F. Cesaroni, B. C. Riemers, A. Lebedev, Dong-Chul Son, T. Kramer, V. Koutsenko, M. Chamizo, A. Adam, Jasper Kirkby, J. A. Bakken, Cheng Chen, A. Mihul, W. J. Burger, Harvey B Newman, M. Sassowsky, A. J.W. van Mil, H. De Boeck, C. Zaccardelli, J. J. Blaising, Stefano Giagu, B. Alpat, J. S. Lee, Paolo Bagnaia, S. S. Gau, Emilio Leonardi, W. W. Kinnison, S. C. Yeh, M. M. Ilyas, L. Urbán, K. Hilgers, C. Spartiotis, M. Tonutti, R. Bock, Crisostomo Sciacca, Marco Pieri, Alessandra Doria, R. Malik, M. Lebeau, N. Yunus, A. Kasser, Ren-Yuan Zhu, Stefan Kirsch, R. Morand, Mariagrazia Alviggi, G. Schwering, Luciano Barone, G. Gratta, P. G. Rancoita, Raffaello D'Alessandro, M. Vivargent, Igor Vorobiev, S. Easo, F. J. Rodriguez, A. Bykov, L. Baksay, F. Cotorobai, E. Dénes, R. Sehgal, D. Duchesneau, V. Plyaskin, T. E. Coan, J. G. Branson, G. F. Susinno, H. R. Gustafson, I. Vetlitsky, B. N. Jin, Leonardo Merola, P. Levtchenko, Howard A. Stone, M. Hebert, Panos A Razis, F. Duhem, Luisa Cifarelli, C. Burgos, E. Valente, W. van Rossum, Roberto Battiston, H. Nowak, Davide Piccolo, Vincenzo Monaco, J. C. Pinto, R. Voelkert, Adrian Biland, D. McNally, P. Bartalini, T. Azemoon, A. Gurtu, Els Koffeman, S. N. Ganguli, V. Commichau, An.A. Vorobyov, A. Degré, W. Lu, M. T. Dova, L. J. Gutay, U. Becker, B. De La Cruz, G. Hu, Helmut Vogel, B. Borgia, T. Paul, Federico Cindolo, L. Z. Sun, Marcos Cerrada, M. Rattaggi, G. Viertel, W. Wallraff, O. Toker, B. Hartmann, O. Adriani, J. Ulbricht, Lucas Taylor, H. O. Cohn, I. Duran, Y. Mi, J. C. Sens, Z. P. Zhang, S. Mangla, S. Banerjee, A. Hasan, N. Scholz, S. Morganti, A. Arefiev, A. Engler, F. J. Eppling, G. J. Zhou, L. W. Jones, Zhuoxiang Ren, Carlos Willmott, Y. Karyotakis, Zp Zhang, Aa Vorobyov, J. Schwenke, Speranza Falciano, S. Mele, S. M. Ting, G. Cara Romeo, B. P. Roe, J. Berdugo, M. Wadhwa, Kajari Mazumdar, C. Cecchi, X. T. Cui, X. Y. Cui, M. Capell, Subir Sarkar, I. Clare, S. Costantini, S. Khokhar, T.R. McMahon, S. Müller, S. C. Tonwar, H. S. Fesefeldt, E. Pistolesi, R. Weill, E. J. Sanchez, Z. M. Wang, D. J. Schotanus, E. Brambilla, Roger Moore, D. Antreasyan, Georgi Sultanov, W. C. van Hoek, Frank Filthaut, A. Bujak, Oliver Kornadt, E. Shumilov, Qi An, P. Lebrun, M. Pohl, P. Marchesini, Xd Cai, G. M. Bilei, Ming Zeng, V. Brigljevic, B. Schoeneich, P. Kapinos, Thomas Ferguson, BT Bouwens, P. Ladron de Guevara, K. Riles, A. Boucham, C. Dionisi, M. Röhner, Pablo Garcia-Abia, M. Caria, M. Acciarri, Guo-Ming Chen, P. Duinker, Simonetta Gentile, T. S. Dai, R. A. Khan, Andre Sopczak, J.V. Allaby, S. Patricelli, W. T. Lin, F. Marzano, G. Coignet, K. N. Qureshi, F. Plasil, X. Y. Yao, Alain Hervé, Mingshui Chen, Q. Ye, J. Gerald, R. Faccini, A. Klimentov, U. Uwer, W. Krenz, A. Bay, H. Janssen, Kenneth Francis Read, G. A. Yang, A. Gougas, M. Lenti, Stefan Roth, M. Lanfranchi, L. Fredj, J. Shukla, J. Salicio, Samuel C.C. Ting, R. T. Van de Walle, Carlo Civinini, M. Maolinbay, G. Raven, F. Ferroni, A. L. Anderson, V. P. Andreev, Y. Zeng, M. Pauluzzi, M. Aguilar-Benitez, I. Dorne, M. Redaelli, M. Möller, Herwig Schopper, J. M. Le Goff, D. H. Wright, N. Gheordanescu, U. K. Chaturvedi, H. Postema, G. Passaleva, M. W. Gruenewald, I. Josa-Mutuberria, Y. S. Lu, P. G. Seiler, J. A. Rubio, M. Chemarin, J. F. Zhou, H. F. Chen, A. Buytenhuijs, D. Ren, J. H. Field, C. Y. Chien, A. Kirkby, G. M. Chen, B. Stoyanov, S. X. Wu, P. Schmitz, Marcella Diemoz, Peter Denes, D. DiBitonto, U. Vikas, M. MacDermott, Ph. Rosselet, M. Steuer, Felicitas Pauss, K. Freudenreich, Marco Meschini, K. Banicz, D. Perret-Gallix, D. Kirkby, M. A. Niaz, S. Rosier-Lees, G. Chiefari, S. Shevchenko, C. Maña, I. C. Brock, P. Le Coultre, M. Basile, F. Behner, Andrea Baschirotto, Christopher George Tully, P. Extermann, Wolfgang Lohmann, H. Vogt, B. Bertucci, A. A. Syed, Christoph Schäfer, I. Leedom, B. Z. Yang, C. Luci, M. Rescigno, H. Hofer, Nicanor Colino, Y. G. Kim, J. K. Kim, D. Luckey, Gy L. Bencze, S. R. Hou, George Alverson, J. S. Kapustinsky, Reinhard W. Schulte, M. Yzerman, G. Ambrosi, F. C. Erné, B. Lindemann, Roberto Castello, Marcel Merk, O. Rind, P. Vikas, G. Tsipolitis, M. Schneegans, K. Sudhakar, J. B. Ye, G. Forconi, Gerard Fernandez, Jozsef Toth, R. Fabbretti, Elisabetta Gallo, S. Reucroft, S. Shotkin, Luca Lista, D. Fernandez, Juven Wang, Yanwen Liu, H. Anderhub, Sabine Riemann, S. P. Ahlen, P. Zemp, R. de Asmundis, A. M. Cartacci, R. Raghavan, A. C. König, G. Alkhazov, Laurent Vuilleumier, H. El Mamouni, Joel Goldstein, D. Goujon, Vincenzo Innocente, A. Favara, Z. Z. Xu, V. Pojidaev, Dai-Sik Kim, B. L. Betev, D. Pandoulas, T. Spickermann, Michael Dittmar, Bernard Ille, J. D. Swain, Y. F. Wang, A. Böhm, Lamberto Luminari, R. C. Ball, Pierre Lecomte, G. Sartorelli, Werner Lustermann, A. C. Weber, A. Chen, G. Mirabelli, K. Lübelsmeyer, Piero Spillantini, Maurizio Biasini, Marta Felcini, Francesco Becattini, Y. Zhou, E. Gonzalez, D. P. Stickland, Y. H. Chang, S. Lanzano, Y. Mir, C. H. Ye, L. Romero, G. J. Bobbink, S. Wynhoff, A. Nippe, Alexander Malinin, M. Bourquin, K. Strauch, Joachim Mnich, X. L. Wang, A. Robohm, M. T. Choi, Francesca Nessi-Tedaldi, C-Q. Li, V. K. Gupta, J. D. Burger, G. Rahal-Callot, S. Ro, R. Bizzarri, Gianpaolo Carlino, F. DeNotaristefani, Manas Maity, P. Berges, K. Schultze, H. Suter, W. Kittel, E. Nagy, M. Fabre, M. E. Sarakinos, J. M. Salicio, R. Mount, Nicola Cavallo, G. Castellini, Z. F. Gong, D.W. Schmitz, G. Pascale, H. Kuijten, M. N. Kienzle-Focacci, V. Soulimov, G.G.G. Massaro, N. Shivarov, Robert Clare, W. G. Ma, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, H. S. Chen, L. Servoli, A. Tsaregorodtsev, K. Y. Lee, J. Busenitz, G. Landi, Simone Paoletti, Suchandra Dutta, Manjit Kaur, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, L3 (IHEF, IoP, FNWI), Acciarri, M., Adam, A., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alpat, B., Alcaraz, J., Allaby, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. L., Andreev, V. P., Angelescu, T., Antreasyan, D., Alkhazov, G., Arefiev, A., Azemoon, T., Aziz, T., P. V. K., Bagnaia, P., Bakken, J. A., Baksay, L., Ball, R. C., Banerjee, S., Banicz, K., Barillere, R., Barone, L., Bartalini, P., Baschirotto, A., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bencze, G. L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Biasini, M., Biland, A., Bilei, G. M., Bizzarri, R., Blaising, J. J., Bobbink, G. J., Bock, R., Bohm, A., Borgia, B., Boucham, A., Bourilkov, D., Bourquin, M., Boutigny, D., Bouwens, B., Brambilla, E., Branson, J. G., Brigljevic, V., Brock, I. C., Bujak, A., Burger, J. D., Burger, W. J., Burgos, C., Busenitz, J., Buytenhuijs, A., Bykov, A., Cai, X. D., Capell, M., Romeo, G. C., Caria, M., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Castello, R., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, C., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chen, M., Chiefari, Giovanni, Chien, C. Y., Choi, M. T., Chung, S., Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coan, T. E., Cohn, H. O., Coignet, G., Colino, N., Commichau, V., Costantini, S., Cotorobai, F., Delacruz, B., Cui, X. T., Cui, X. Y., Dai, T. S., Dalessandro, R., Deasmundis, R., Deboeck, H., Degre, A., Deiters, K., Denes, E., Denes, P., Denotaristefani, F., Dibitonto, D., Diemoz, M., Dionisi, C., Dittmar, M., Doria, A., Dorne, I., Dova, M. T., Drago, E., Duchesneau, D., Duhem, F., Dunker, P., Duran, I., Dutta, S., Easo, S., Elmamouni, H., Engler, A., Eppling, F. J., Erne, F. C., Ernenwein, J. P., Extermann, P., Fabbretti, R., Fabre, M., Faccini, R., Falciano, S., Favara, A., Fay, J., Felcini, M., Ferguson, T., Fernandez, D., Fernandez, G., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. 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Subjects: Nuclear and High Energy Physics, Particle physics, COLLISIONS, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Electron–positron annihilation, Hadron, 01 natural sciences, Nuclear physics, COLLIDER, neutralinos, GLUINO, 0103 physical sciences, SUPERSYMMETRY, lep, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], LEVEL ENERGY TRIGGER, RADIATIVE-CORRECTIONS, PARTICLES, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, L3 EXPERIMENT, Physics, Gluino, 010308 nuclear & particles physics, photon, Física, Supersymmetry, Fermion, LEP, Neutralino, FERMILAB TEVATRON, fermion pair, Particle Physics - Experiment, Minimal Supersymmetric Standard Model
Abstract: We have searched for neutralinos produced via the reactions e+e− → χχ′ and e+e−→ χ′χ′, where the next-to lightest neutralino, χ′, decays into the lightest neutralino, χ, and either a photon or a fermion pair. Based on 1.8 × 106 hadronic Z decays collected with the L3 detector at LEP, no signal has been observed. We present upper limits of a few times 10−5 on the branching ratios Z → χχ′ and Z → χ′χ′. In the framework of the Minimial Supersymmetric Standard Model, we exclude a lightest χ with mχ less than 18 GeV, if either tan β > 2 or the gluino mass m≈g > 100 GeV., Facultad de Ciencias Exactas
Published: 1995

5. Inclusive J production in Z$^0$ decays

Author: D. Antreasyan, Yu. Galaktionov, M. Bocciolini, H. Janssen, J. Alcaraz, M. Brooks, J. G. Branson, P. Duinker, M. Vivargent, M. N. Kienzle-Focacci, A. Klimentov, U. Herten, R. Mount, W. J. Burger, Kenneth Francis Read, A. Tsaregorodtsev, Roberto Battiston, D. Hauschildt, M. Fabre, Gerjan Bobbink, B. Borgia, Lamberto Luminari, Xin-Qiang Li, H. J. Schreiber, J. Ulbricht, R. C. Ball, Raffaello D'Alessandro, Pierre Lecomte, G. Sartorelli, O. An, C. Grinnell, C. G. Yang, Dimitri Bourilkov, E. Nagy, Leonardo Merola, W. Y. Chen, K. N. Qureshi, P.V.K.S. Baba, S. C. Yeh, A. Nippe, D. Duchesneau, H. Anderhub, I. Clare, J. Busenitz, R. Y. Zhu, B. Zhou, N. E. Moulai, X. L. Wang, T. Azemoon, A. Gougas, Pablo Garcia-Abia, Alain Hervé, M. Schneegans, Z. M. Wang, Y. J. Pei, E. Fiandrini, C. Neyer, V. Plyaskin, S. Shevchenko, L. Romero, Luca Lista, S. Beingessner, K. S. Yang, M. Möller, P. Göttlicher, B. C. Stringfellow, D. Fernandez, Z. F. Gong, T. Paul, Yanwen Liu, H. S. Chen, Y. H. Chang, P. Kapinos, G. Sauvage, K. L. Tung, Z. Y. Lin, J. Mnich, Marcos Cerrada, M. Caria, George Alverson, A. Bay, L. Vuilleumier, G. S. Sanders, R. T. Van de Walle, T. J. Wenaus, M. T. Dova, X. R. Shi, K. Strauch, H. Nowak, T. Kramer, A. Rubbia, T. Foreman, J. M. Salicio, W. Lohmann, R. W. Kraemer, R. Fabbretti, A. Bujak, T. E. Coan, J. Behrens, Y. D. Xu, B. Monteleoni, F. Sticozzi, A. Koulbardis, T. Angelov, Wt Lin, J. Bao, K. Hilgers, V. K. Gupta, J. P. Burq, C. Spartiotis, B. Wysouch, D.N. Mao, X. T. Cui, N. Yunus, J. S. Kapustinsky, W. W. Kinnison, M. Bourquin, R. B. Sutton, A. Chen, R. Barillère, P. Zemp, Z. P. Zhang, R. Bizzarri, C. F. He, Carlo Civinini, M. Maolinbay, G. Raven, M. Aguilar-Benitez, F. DeNotaristefani, R. Morand, Pierluigi Paolucci, Steven Ahlen, M. Merk, R. de Asmundis, Jianming Qian, G. Hu, W. Wallraff, J. Shukla, C. Zaccardelli, Howard A. Stone, C. Timmermans, J. H. Wang, P. Vikas, G. Schwering, J. J. Blaising, H. L. Zhuang, G. Herten, G. Chiefari, G. Q. Hu, S. Banerjee, P. Berges, M. Sachwitz, I. Vetlitsky, M. White, V. Koutsenko, G. Gratta, W. G. Ma, F. Behner, S. Röhner, B. L. Betev, Maurizio Biasini, F. Wittgenstein, Marta Felcini, Adrian Biland, A. A. Syed, Carlos Willmott, Speranza Falciano, Y. F. Wang, J. A. Bakken, J. D. Burger, U. Becker, Z. Q. Yang, L. Ludovici, Francesco Becattini, M. Rescigno, R. Rosmalen, G. Rahal-Callot, M. Sassowsky, Alberto Aloisio, A. Ricker, M. Chmeissani, Giovanni Ambrosi, M. Fukushima, B. Ille, E. Drago, G. B. Mills, E. Gonzalez, A. Marin, Th. Meinholz, A. M. Cartacci, R. Raghavan, M. Yzerman, K. Schultze, H. Suter, L. J. Gutay, D. S. Yan, Atul Gurtu, K. Deiters, P. A. Piroué, B. C.C. van der Zwaan, D. Lanske, L. Z. Sun, H. Schopper, H. R. Dimitrov, Chenjie Gu, D. Kirkby, W. Kittel, F. J. Eppling, L. W. Jones, S. M. Ting, Z. L. Xue, B. Lindemann, Tariq Aziz, A. Kunin, P. Arce, D. Goujon, L. Urbán, K. Sudhakar, Q. Y. Yang, Vincenzo Innocente, G. Finocchiaro, M. W. Gruenewald, R. L. Sumner, M. Capell, J. C. Sens, M. Lenti, S. Schulte, K. Schmiemann, H. S. Fesefeldt, J. Wenninger, A. Pevsner, J. Perrier, E. Dénes, R. Sehgal, D. Linnhofer, Jiunn-Wei Chen, B. P. Roe, V. Pojidaev, H. O. Cohn, S. S. Gau, R. Leiste, A. Nadtochy, Federico Carminati, D. P. Stickland, R. Malik, P. Lebrun, Barry Blumenfeld, Y. Mir, C. H. Ye, G. M. Bilei, Valery Schegelsky, Antonino Zichichi, Crisostomo Sciacca, Marco Pieri, J. M. Lubbers, Ph Fisher, Andrea Contin, H. Rykaczewski, Y. Karyotakis, S. J. Fan, A. Krivschich, Igor Vorobiev, S. Patricelli, Gerard Fernandez, Oliver Kornadt, M. Pohl, S. Chung, I. Scott, H. T. Li, M. Wadhwa, Q. Ye, Attilio Santocchia, J. B. Ye, J. M. You, M. Dhina, J. M. Le Goff, D. H. Wright, N. Produit, V. R. Krastev, Jozsef Toth, Stéphane Jézéquel, D. Boutigny, J. Lettry, G. A. Yang, Simonetta Gentile, F. Crijns, Y. G. Wu, Georgi Sultanov, J. Berdugo, T. S. Dai, Davide Piccolo, P. G. Seiler, P. McBride, R. A. Khan, L. Antonov, Elisabetta Gallo, S. N. Ganguli, A. Degré, A. Sopczak, A. Kasser, H. Newman, P. K. Malhotra, H. A. Rizvi, T. Driever, A. C. Weber, C. Li, J. A. Rubio, G. Mirabelli, V. P. Andreev, M. Guanziroli, K. Lübelsmeyer, Piero Spillantini, A. Engler, D. Pandoulas, G. M. Chen, T. Spickermann, Y. S. Lu, A. C. König, E. Valente, D. McNally, Hafeez R Hoorani, S. Reucroft, Peter Denes, S. Shotkin, J. D. Swain, H. Kuitjen, Y. F. Mao, Paolo Bagnaia, A. Böhm, C. Chen, E. Shumilov, R. Weill, T. McMahon, E. Sajan, T. Ferguson, O. Fackler, X. Leytens, Helmut Vogel, G. Viertel, Felicitas Pauss, V. Shoutko, Y. Mi, S. Rosier-Lees, F. L. Linde, S. Morganti, Y. Y. Xie, Z. Ren, P. Le Coultre, P. Schmitz, Kajari Mazumdar, M. Tonutti, J. Schwenke, K. Freudenreich, K. Hangarter, S. Khokhar, X. J. Yan, S. Müller, X. Y. Cui, X. W. Tang, M. MacDermott, S. C. Tonwar, Z. W. Yin, I. C. Brock, C. R. Wang, Frank Filthaut, R. Starosta, S. X. Wu, M. A. Niaz, P. Razis, W. J. Metzger, M. Chemarin, Xd Cai, D. Luckey, Gy L. Bencze, C. Maña, L. Martinez-Laso, D.W. Schmitz, K. S. Kumar, Reinhard W. Schulte, M. Pauluzzi, F. Cesaroni, G.G.G. Massaro, D. DiBitonto, F. C. Erné, Claudio Luci, G. H. Wang, P. Extermann, F. Ferroni, Robert Clare, A. Atamanchuk, J. P. Martin, D. Ren, Emilio Leonardi, Y. Zeng, I. Leedom, S. Riemann, Ph. Rosselet, M. Steuer, G. Forconi, J. Weber, Thomas Hebbeker, Paul Lecoq, H. Hofer, R. Bock, C. Buisson, D.J. Schotanus, M. Napolitano, M. Gailloud, U. Vikas, M. S. Sarakinos, F. Plasil, L. Baksay, E. Soderstrom, L. Servoli, Marco Meschini, J. K. Guo, D. Perret-Gallix, M.L. Chen, S. Lanzano, D. Gele, Samuel C.C. Ting, O. Rind, Christopher George Tully, D. Z. Shen, A. L. Anderson, Steven Goldfarb, P. J. Li, D. M. Lee, F. Marion, Marcella Diemoz, B. Bertucci, R. J. Wu, G. Passaleva, J. F. Zhou, J. Fay, Nicanor Colino, BT Bouwens, G. Landi, J. Schütte, M. Hebert, Egidio Longo, Simone Paoletti, B. N. Jin, G. Tsipolitis, P. Marchesini, U. Uwer, H. Vogt, Manjit Kaur, C. Dionisi, H. El Mamouni, Ming Zeng, M. M. Ilyas, H. Akbari, J. Salicio, M. Röhner, Daqiang Zhang, F. J. Rodriguez, A. Arefiev, H. R. Gustafson, Luciano Barone, I. Sheer, G. Carlino, An.A. Vorobyov, T. Matsuda, J. Y. Liao, O. Adriani, Z. Z. Xu, Lucas Taylor, M. G. Alviggi, Els Koffeman, F. Marzano, S. Kirsch, G. Coignet, Q. F. Wang, W. Krenz, E. Brambilla, Yu. Kamyshkov, G. Orgatini, A. Hasan, B. Z. Yang, U. K. Chaturvedi, W. Friebel, A. Malinin, Jérôme Rose, J. H. Field, C. Y. Chien, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, IHEF (IoP, FNWI), Adriani, O., Aguilarbenitez, M., Ahlen, S., Akbari, H., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. 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Subjects: Physics, Nuclear and High Energy Physics, E+E ANNIHILATION, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, 01 natural sciences, 7. Clean energy, lcsh:QC1-999, Nuclear physics, Momentum, PSI-X%22">B->PSI-X, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Z0, FRAGMENTATION, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Particle Physics - Experiment, lcsh:Physics
Abstract: Inclusive J production in Z0 decays is observed via the leptonic decay mode J → l+l− (l = e,μ). We measure the branching ratio Br(Z0 → J + X) = (4.1 ± 0.7 (stat.) ± 0.3 (sys.)) × 10−3. We have calculated the fraction of the J mesons from b-hadron decay and find a branching ratio of Br(b → J + X)= (1.3±0.2(stat.)±0.2(sys.)) × 10−2. We determine the average fractional energy of bottom hadrons 〈XE > = 0.70±0.03 (stat.)+0.02−0.01 (sys.) using the momentum spectrum of the J mesons. From a study of the angle between the J and the most energetic jet, we set an upper limit on the branching ratio Br ( Z 0 → q q g ∗ ; g ∗ → J + X ) −4 at 90% confidence level.
Published: 1992
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6. Determination of the number of light neutrino species

Author: Emilio Leonardi, J. Schütte, R. Bock, L. Baksay, Helmut Vogel, Kajari Mazumdar, S. Khokhar, T.R. McMahon, X. J. Yan, S. Müller, Xd Cai, C. Neyer, D. Linnhofer, M. MacDermott, Federico Carminati, A. M. Cartacci, M. Fukushima, M. Vivargent, M. Sachwitz, M. Lenti, S. Beingessner, A. Nadtochy, Adrian Biland, R. Raghavan, A. C. König, G. Landi, M. L. Brooks, V. Plyaskin, H. Nowak, J. M. Le Goff, D. H. Wright, Pablo Garcia-Abia, Alain Hervé, G. S. Sanders, Roberto Battiston, Yu. Kamyshkov, Laurent Vuilleumier, P. G. Seiler, J. A. Rubio, U. Herten, L. Z. Sun, M. A. Niaz, W. Kittel, J. Mnich, Ren-Yuan Zhu, Simone Paoletti, G. M. Bilei, Y. J. Pei, G. Sauvage, A. Bay, Luciano Barone, Georgi Sultanov, Mw Gruenewald, J. Alcaraz, D. Antreasyan, M. T. Dova, P. Vikas, D. Pandoulas, S. J. Fan, T. S. Dai, R. A. Khan, A. Arefiev, A. Rubbia, T. Foreman, M. Schneegans, L. Romero, Carlo Civinini, Manjit Kaur, C. Dionisi, G. B. Mills, H. O. Cohn, P. Extermann, I. Leedom, B. Z. Yang, H. Hofer, C. G. Yang, G. H. Wang, K. L. Tung, Q.Y. Yang, W. Wallraff, Wt Lin, E. Nagy, H. Akbari, V. P. Andreev, Daqiang Zhang, S. Banerjee, Zp Zhang, Els Koffeman, P. Marchesini, Maurizio Biasini, M. Maolinbay, G. Raven, K. S. Kumar, X.G. Li, J. Bao, M. Aguilar-Benitez, K. Sudhakar, J. Wenninger, Cheng Chen, Dimitri Bourilkov, H. J. Schreiber, C. Gui, Gerjan Bobbink, B. Borgia, N. E. Moulai, E. Fiandrini, M. Chemarin, Qi An, A. Engler, Marta Felcini, V. Pojidaev, M. Bourquin, G. M. Chen, Wen-Gan Ma, W. J. Burger, E. Brambilla, G. Carlino, J. B. Ye, M. Fabre, X. T. Cui, C. Zaccardelli, R. Barillère, S. Patricelli, K. Strauch, Herwig Schopper, D.N. Mao, Steven Ahlen, R.J. Wu, F. Marsano, T. Spickermann, Francesco Becattini, M. White, Ming Zeng, Z.M. Wang, D. M. Lee, Alberto Aloisio, A. Ricker, J. C. Sens, H. S. Fesefeldt, M. Capell, A. Hasan, B. N. Jin, Gerard Fernandez, H. Janssen, K.S. Yang, W. W. Kinnison, S. C. Yeh, M. Guanziroli, Jozsef Toth, J. Lettry, Stefan Kirsch, G. Herten, A. A. Syed, W. 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Rahal-Callot, Yuehong Xie, Sabine Riemann, R. Weill, U. Uwer, E. Soderstrom, H. S. Chen, A. Chen, X. R. Shi, Christine Buisson, Felicitas Pauss, Marcos Cerrada, L. Servoli, J. Salicio, M. Yzerman, F. Crijns, G. Schwering, A. Nippe, D. Duchesneau, Alexander Malinin, Crisostomo Sciacca, Marco Pieri, A. Krivshich, A. L. Anderson, F. Marion, P. Le Coultre, I. Duran, J. D. Swain, A. Klimentov, H. Suter, S. Lanzano, X. L. Wang, Mariagrazia Alviggi, Y.F. Mao, D. Lanske, Ying Wu, J. F. Zhou, U. K. Chaturvedi, K. Hangarter, F. Wittgenstein, Y. S. Lu, F. J. Eppling, L. W. Jones, P. McBride, D. Boutigny, Kenneth Francis Read, R. Starosta, I. Clare, J. Busenitz, L. J. Gutay, D. S. Yan, S. M. Ting, Jun Guo, L. Ludovici, M. Chmeissani, R. T. Van de Walle, Z. F. Gong, D. Luckey, Gy L. Bencze, Reinhard W. Schulte, B. L. Betev, E. Drago, Jérôme Rose, F. C. Erné, J. H. Field, K. Schmiemann, C. Y. Chien, M. Bocciolini, I. Vetlitsky, P. Göttlicher, A. Marin, T. Driever, B. Lindemann, C. Li, W. Y. 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Liao, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Adriani, O., Aguilarbenitez, M., Ahlen, S., Akbari, H., Alcaraz, J., Aloisio, Alberto, Alverson, G., Alviggi, Mariagrazia, Ambrosi, G., An, Q., Anderhub, H., Anderson, A. 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Subjects: cross-section, Nuclear and High Energy Physics, Aleph, Particle physics, electron positron. colliding beams, electron positron. annihilation, Electron–positron annihilation, Hadron, 01 natural sciences, Nuclear physics, neutrino, single photon events, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Ciencias Exactas, hadron. multiple production, Z° resonance, Physics, electron positron, Large Hadron Collider, electroweak interaction, 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, High Energy Physics::Phenomenology, Electroweak interaction, Física, E+E COLLISIONS, Photon emission, Large Electron–Positron Collider, neutrino. flavor, High Energy Physics::Experiment, hadron, Neutrino, Particle Physics - Experiment, experimental results
Abstract: We have measured the cross-section of the production of single photon events in e + e- collisions near the Z ° resonance. For an integrated luminosity of 9.6 pb -1, we have observed 202 single photon candidates with energy between 0.9 and 3.5 GeV in the polar angular region between 45 ° and 135 °. Assuming that the only stable weakly interacting particles are light neutrinos with standard model couplings, we determine the number of light neutrino species to be Nv = 3.14 + 0.24 (stat.)4-0.12 (syst.). This corresponds to an invisible Z ° width of Finv = 524 + 40 4- 20 MeV., Facultad de Ciencias Exactas
Published: 1992
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7. Measurement of electroweak parameters from hadronic and leptonic decays of the Z$^0$

Author: E. Valente, Alberto Aloisio, A. Ricker, Th. Meinholz, R. Sehgal, D. McNally, E. Dénes, R. Fabbretti, D. Linnhofer, Federico Carminati, Dimitri Bourilkov, X. W. Tang, L. Antonov, G. Viertel, N. E. Moulai, Raffaello D'Alessandro, L. Z. Sun, R. Leiste, C. Grinnell, F. Cesaroni, L.S. Hsu, I. Sheer, P. A. Piroué, D. Gele, M. Capell, J. Krizmanic, A. Marchionni, H. R. Gustafson, An.A. Vorobyov, T. Matsuda, S. Morganti, J. Schwenke, X. Y. Cui, O. Adriani, J. P. Burq, Lucas Taylor, Leonardo Merola, Gerard Fernandez, G. Herten, Yuehong Xie, J. Y. Liao, B. Monteleoni, F. Sticozzi, M. Hebert, L. Martinez-Laso, T. Azemoon, F. Diez-Hedo, V.R. Krastev, E. Gonzalez, S. Patricelli, Q. Ye, M. Vivargent, B. Spiess, Christine Buisson, Yu. Kamyshkov, Yanwen Liu, Jozsef Toth, J. Lettry, Claudio Luci, Mw Gruenewald, G. B. Mills, W. Friebel, G. Faber, Z. M. Wang, C. G. Yang, Peter Denes, Jj Blaising, Zheng Wang, C. Spartiotis, Marcos Cerrada, Panos A Razis, Zhenyu Zhang, Emilio Leonardi, J. Schütte, K. S. Kumar, G. Sauvage, C. Neyer, Y. J. Pei, R. Liu, Paolo Bagnaia, M. Rubio, C. Dionisi, P. Marchesini, Elisabetta Gallo, R. Bock, J. M. Salicio, G. Landi, Sabine Riemann, Pablo Garcia-Abia, Ming Zeng, Axel König, Bolek Wyslouch, Qian Wang, T. Kramer, S. Lanzano, Bernardo Adeva, D. Pandoulas, D. Z. Shen, V. Lalieu, S. Rosier-Lees, B. N. Jin, H. Nowak, Sc Yeh, Alain Hervé, M. Röhner, W. Y. Chen, M. J. Glaubman, T. Spickermann, R. Morand, Z. L. Xue, A. Klimentov, P. Blömeke, A. Gordeev, L. Baksay, F. Bruyant, S. S. Gau, T. J. Wenaus, P.V.K.S. Baba, Y. Mi, A. Bay, Carlo Civinini, M. Maolinbay, Harvey B Newman, K. Hilgers, J.C. Sens, R. Mount, A. M. Cartacci, C-Q. Li, R. Raghavan, Y.P. Tong, J. A. Bakken, R. Bizzarri, C. F. He, A. Pevsner, V. Koutsenko, Yu. Galaktionov, J. Alcaraz, Howard A. Stone, F. Tonisch, Q. Fan, H. L. Zhuang, M. Yzerman, X.G. Li, M. Aguilar-Benitez, Chenliang Wang, Y.F. Mao, S. Reucroft, R. T. Van de Walle, G. Hu, Laurent Vuilleumier, V.G. 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Zemp, Subarno Banerjee, R. de Asmundis, M. Möller, Y. D. Xu, H. F. Chen, J. Behrens, P. J. Li, P. Lebrun, G. Chiefari, G. Paternoster, D.W. Schmitz, U. Uwer, Robert Clare, A. Chen, J. Salicio, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, D. H. Wright, M. Napolitano, E. Soderstrom, H. S. Chen, G. S. Sanders, Y. H. Chang, George Alverson, P. G. Seiler, J. A. Rubio, Vineet Kumar, F. Ferroni, Y. Zeng, P. Schmitz, K. Freudenreich, C. Maña, I. C. Brock, Wen-Gan Ma, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, B., Adevaa, O., Adrianib, M., Aguilar Benitezc, H., Akbarid, J., Alcarazd, Aloisio, Alberto, G., Alversonf, Alviggi, Mariagrazia, Q., Ang, H., Anderhubh, A. L., Andersoni, V. P., Andreevj, T., Angelovi, L., Antonovk, D., Antreasyanℓ, P., Arcec, A., Arefievm, T., Azemoonn, T., Azizo, P. V. K. S., Babag, P., Bagnaiap, J. A., Bakkenq, L., Baksayr, R. C., Balln, S., Banerjeeo, J., Baod, L., Baronep, A., Bay, U., Beckeri, J., Behrensh, S., Beingessnert, Benczeu, G. y. L., J., Berdugoc, P., Bergesi, B., Bertuccip, B. L., Betevk, A., Bilandh, R., Bizzarrip, J. J., Blaisingt, P., Blömekev, B., Blumenfeldd, G. J., Bobbinkw, M., Bocciolinib, W., Böhlenx, A., Böhmv, T., Böhringery, B., Borgiap, D., Bourilkovk, M., Bourquin, D., Boutignyt, J. G., Bransonz, I. C., Brockaa, F., Bruyanta, C., Buissona, A., Bujakc, J. D., Burgeri, J. P., Burqa, J., Busenitzad, X. D., Caig, C., Campsv, M., Capelln, F., Carbonara, F., Carminatib, A. M., Cartaccib, M., Cerradac, F., Cesaronip, Y. H., Changi, U. K., Chaturvedig, M., Chemarina, A., Chena, C., Chena, G. M., Chena, H. F., Chena, H. S., Chena, M., Cheni, M. C., Chena, Chiefari, Giovanni, C. Y., Chiend, C., Civininib, I., Clarei, R., Clarei, G., Coignett, N., Colinoa, V., Commichauv, G., Confortob, A., Contina, F., Crijnsw, X. Y., Cuig, T. S., Daii, R., D'Alessandrob, R., de Asmundise, A., Degréa, K., Deitersaa, E., Dénesu, P., Denesq, F., De Notaristefanip, M., Dhinah, D., Dibitontoa, F., Diez Hedoa, H. R., Dimitrovk, C., Dionisip, F., Dittusa, R., Dolini, E., Drago, T., Drieverw, D., Duchesneau, P., Duinkera, I., Durana, H., El Mamouniab, A., Englera, F. J., Epplingi, F. C., Ernéw, P., Extermann, R., Fabbrettih, G., Faberi, S., Falcianop, Q., Fana, S. J., Fana, M., Fabreh, J., Faya, J., Fehlmannh, H., Fenkerf, T., Fergusonaa, G., Fernandezc, F., Ferronia, H., Fesefeldtv, J., Field, G., Finocchiarop, P. H., Fisherd, G., Forconi, T., Foremanw, K., Freudenreichh, W., Friebela, M., Fukushimai, M., Gailloudy, Galaktionovm, Y. u., E., Gallob, S. N., Gangulio, P., Garcia Abiac, S. S., Gaua, S., Gentilep, M., Glaubmanf, S., Goldfarbn, Z. F., Gonga, E., Gonzalezc, A., Gordeevm, P., Göttlicherv, D., Goujon, G., Grattaa, C., Grinnelli, M., Gruenewalda, M., Guanzirolig, A., Gurtuo, H. R., Gustafsonn, L. J., Gutayac, H., Haanv, S., Hanckev, K., Hangarterv, M., Harrisa, A., Hasang, C. F., Heaj, T., Hebbekerv, M., Hebertz, G., Herteni, U., Hertenv, A., Hervéa, K., Hilgersv, H., Hoferh, H., Hooranig, L. S., Hsuae, G., Hug, G. Q., Huaj, B., Illeab, M. M., Ilyasg, V., Innocentee, E., Isiksalh, E., Jagelg, B. N., Jinaf, L. W., Jonesn, R. A., Khang, Kamyshkovm, Y. u., Y., Karyotakist, M., Kaurg, S., Khokharg, V., Khozej, D., Kirkbyah, W., Kittelw, A., Klimentovm, A. C., Königw, O., Kornadtv, V., Koutsenkom, R. W., Kraemeraa, T., Krameri, V. R., Krastevk, W., Krenzv, J., Krizmanicd, A., Kuhnx, K. S., Kumarak, V., Kumarg, A., Kuninm, A., van Laakv, V., Lalieu, G., Landib, K., Laniusa, D., Lanskev, S., Lanzano, P., Lebrunab, P., Lecomteh, P., Lecoqa, P., Le Coultreh, I., Leedomf, J. M., Le Goffa, L., Leistama, R., Leisteai, M., Lentib, J., Lettryh, P. M., Levchenkoj, X., Leytensw, C., Liag, H. T., Liaf, J. F., Lig, L., Lih, P. J., Liaj, Q., Lig, X. G., Liaf, J. Y., Liaoaj, Z. Y., Linag, F. L., Lindeaa, D., Linnhofera, R., Liug, Y., Liug, W., Lohmannai, S., Lökösr, E., Longop, Y. S., Luaf, J. M., Lubbersw, K., Lübelsmeyerv, C., Lucia, D., Luckeyℓ, L., Ludovicip, X., Lueh, L., Luminarip, W. G., Maag, M., Macdermotth, R., Magahizr, M., Mairet, P. K., Malhotrao, R., Malikg, A., Malininm, C., Mañac, D. N., Maon, Y. F., Maoaf, M., Maolinbayh, P., Marchesinig, A., Marchionnib, J. P., Martinab, L., Martineza, F., Marzanop, G. G. G., Massarow, T., Matsudai, K., Mazumdaro, P., Mcbrideak, T., Mcmahonac, D., Mcnallyh, Meinholzv, T. h., M., Merkw, Merola, Leonardo, M., Meschinib, W. J., Metzgerw, Y., Mig, M., Mickev, U., Mickev, G. B., Millsn, Y., Mirg, G., Mirabellip, J., Mnichv, M., Möllerv, B., Monteleonib, G., Morand, R., Morandt, S., Morgantip, V., Morgunovm, R., Mountah, E., Nagyu, Napolitano, Marco, H., Newmanah, M. A., Niazg, L., Niessenv, D., Pandoulasv, G., Passalevab, Paternoster, Giovanni, Patricelli, Sergio, Y. J., Peiv, D., Perret Gallixt, J., Perrier, A., Pevsnerd, M., Pierib, P. A., Pirouéq, V., Plyaskinm, M., Pohlh, V., Pojidaevm, N., Produit, J. M., Qiani, K. N., Qureshig, R., Raghavano, G., Rahal Calloth, P., Razish, K., Readq, D., Renh, Z., Reng, S., Reucroftf, O., Rindn, C., Rippichaa, H. A., Rizvig, B. P., Roen, M., Röhnerv, S., Röhnerv, U., Roeserai, Rombachv, T. h., L., Romeroc, J., Rosev, S., Rosier Leest, R., Rosmalenw, Rosselety, P. h., J. A., Rubioa, W., Ruckstuhl, H., Rykaczewskih, M., Sachwitzai, J., Salicioa, J. M., Salicioc, G., Sartorelliℓ, G., Sauvaget, A., Savinm, V., Schegelskyj, D., Schmitzv, P., Schmitzv, M., Schneeganst, M., Schöntagv, H., Schopperaℓ, D. J., Schotanusw, H. J., Schreiberai, R., Schultev, S., Schultev, K., Schultzev, J., Schütteak, J., Schwenkev, G., Schweringv, Sciacca, Crisostomo, I., Scottak, R., Sehgalg, P. G., Seilerh, J. C., Sensw, I., Sheerz, V., Shevchenkom, S., Shevchenkom, X. R., Shiaa, K., Shmakovm, V., Shoutkom, E., Shumilovm, N., Smirnovj, A., Sopczakah, C., Spartiotisd, T., Spickermannv, B., Spiessx, P., Spillantinib, R., Starostav, M., Steuerℓ, D. P., Sticklandq, B., Stöhrh, H., Stone, K., Strauchak, B. C., Stringfellowac, K., Sudhakarv, G., Sultanova, R. L., Summerq, L. Z., Sunag, H., Suterh, R. B., Suttonaa, J. D., Swaing, A. A., Syedg, X. W., Tangaf, E., Tarkovskym, L., Taylorf, E., Thomasg, C., Timmermansw, Samuel C. C., Tingi, S. M., Tingi, Y. P., Tongae, F., Tonischai, M., Tonuttiv, S. C., Tonwaro, J., Tòthu, G., Trowitzschai, K. L., Tungaf, J., Ulbrichtx, L., Urbànu, U., Uwerv, E., Valentep, R. T., Van de Wallew, H., van der Graafw, I., Vetlitskym, G., Viertelh, P., Vikasg, U., Vikasg, M., Vivargentt, H., Vogelaa, H., Vogtai, M., Vollmarv, G., Von Dardela, I., Vorobievm, A. A., Vorobyovj, Vorobyovj, A. n. A., L., Vuileumiery, M., Wadhwag, W., Wallraffv, C. R., Wangag, G. H., Wangaa, J. H., Wangaf, O. F., Wangak, X. L., Wangag, Y. F., Wangb, Z., Wangg, Z. M., Wangg, J., Weberh, R., Weilly, T. J., Wenausi, J., Wenninger, M., Whitei, R., Wilhelmw, C., Willmottc, F., Wittgensteina, D., Wrightq, R. J., Wuaf, S. L., Wug, S. X., Wug, Y. G., Wuaf, B., Wysłouchi, Y. D., Xuaf, Z. Z., Xuag, Z. L., Xueaj, D. S., Yanaj, B. Z., Yangag, C. G., Yangaf, G., Yangg, K. S., Yangaf, Q. Y., Yangaf, Z. Q., Yangaj, C. H., Yeg, J. B., Yeh, Q., Yeg, S. C., Yehae, Z. W., Yinaj, J. M., Youg, C., Zaccardelliah, L., Zehnderh, M., Zengg, Y., Zengv, D., Zhangz, D. H., Zhangw, Z. P., Zhangag, J. F., Zhouv, R. Y., Zhuah, H. L., Zhuangaf, and A., Zichichi
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Electron–positron annihilation, Electroweak interaction, Hadron, Física, Weinberg angle, large electron positron collider, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Large Electron–Positron Collider, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Partículas Elementales, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, Ciencias Exactas, Lepton
Abstract: We have studied the reactions e+e−→hadrons, e+e−, μ+ μ− and τ+τ−, in the energy range 88.2 ≦ √s ≦ 94.2 GeV. A total luminosity of 5.5 pb−1, corresponding to approximately 115000 hadronic and 10000 leptonic Z0 decays, has been recorded with the L3 detector. From a simultaneous fit to all of our measured cross section data, we obtain assuming lepton universality: Mz = 91.181 ± 0.010 ± 0.02 (LEP) GeV, Γz = 2501 ± 17 MeV, Γhad= 1742 ± 19 MeV, Γt = 83.6 ± 0.8 MeV. If we do not assume lepton universality, we obtain for the partial decay widths of the Z0 into e+e−, μ+μ− and τ+ τ−: Γe = 83.3 ± 1.1 MeV, Γμ = 84.5 ± 2.0 MeV, Γτ = 84.0 ± 2.7 MeV. From the measured ratio of the invisible and the leptonic decay widths of the Z0, we determine the number of light neutrino species to be Nv =3.05±0.10. We include our measurements of the forward-backward asymmetry for the leptonic channels in a fit to determine the vector and axial-vector neutral current coupling constants of charged leptons to the Z0. We obtain g¯V = −0.046+0.015−0.012 and g¯A = −0.500 ± 0.003. In the framework of the Standard Model, we estimate the top quark mass to be mt =193+52−69 ± 16 (Higgs) GeV, and we derive a value for the weak mixing angle of sin2θW ≡ 1 − (MW/MZ)2 = 0.222 ± 0.008, corresponding to an effective weak mixing angle of sin2θ¯W = 0.2315 ± 0.0025., Facultad de Ciencias Exactas
Published: 1991
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8. Search for excited neutrinos from Z$^0$ decays

Author: Dimitri Bourilkov, E. Nagy, E. Valente, M. Guanziroli, Tariq Aziz, R. Raghavan, R. Weill, D. McNally, Y.P. Tong, M. Schneegans, D. M. Lee, Laurent Vuilleumier, F. Cesaroni, J. P. Martin, X. Leytens, G. Viertel, G. Sauvage, J. Y. Liao, E. Isiksal, S. Morganti, W. Kittel, E. Shumilov, Ren-Yuan Zhu, Luciano Barone, J. Schütte, Crisostomo Sciacca, François Chollet, Marco Pieri, G. H. Wang, J. Schwenke, G. Herten, W. Friebel, G. Faber, M. Schöntag, X. Y. Cui, M. Möller, V. Shoutko, A. Kuhn, Harvey B Newman, K. Hilgers, C. Rippich, J. Wenninger, J. A. Bakken, U. Micke, F. Bruyant, M. J. Glaubman, V. Pojidaev, D. Linnhofer, H. F. Chen, V. Plyaskin, Nikita Smirnov, R. Mount, M. Tonutti, Zm Wang, T. Angelov, M. Fabre, S. Beingessner, D. Pandoulas, T. McMahon, Wen-Gan Ma, H. El Mamouni, B. P. Roe, G. Chiefari, K. Lanius, Qiang Li, J. Berdugo, G. Hu, F. C. Erné, Q.Y. Yang, A. Gurtu, Igor Vorobiev, Konrad Deiters, Georgi Sultanov, V. Commichau, H. J. Schreiber, J. Mnich, M.L. Chen, Sc Yeh, S. Shevchenko, Helmut Vogel, Alberto Aloisio, M. Sachwitz, L. Li, L. Urbàn, R. A. Khan, Carlos Willmott, R.C. Ball, Adrian Biland, Panos A Razis, L. J. Gutay, G. Landi, D. Duchesneau, T. Driever, P. Arce, T. Foreman, G. Fernandez, Speranza Falciano, T. Spickermann, A. Bujak, Oliver Kornadt, P. Blömeke, M. Bocciolini, P. Duinker, Alexander Malinin, M. Merk, U. Becker, Raffaello D'Alessandro, C. Grinnell, K.D. Shmakov, S. J. Fan, A. A. Syed, D. Goujon, M. Pohl, A. Gordeev, M. Micke, B. L. Betev, Th. Meinholz, P. Vikas, Bernard Ille, A. C. König, Kajari Mazumdar, S. Khokhar, Marcella Diemoz, G. Von Dardel, D.N. Mao, Yu. Kamyshkov, A. Hasan, R. Rosmalen, X. W. Tang, Leonardo Merola, Y. D. Xu, J. Bao, V. P. Andreev, M. Chemarin, J.F. Li, H. T. Li, Qi An, S. Lökös, K.S. Yang, Th. Rombach, Z.Q. Yang, B. Spiess, G. M. Chen, K. Sudhakar, F. J. Eppling, L. W. Jones, D. S. Yan, S. M. Ting, U. Herten, F. Plasil, T. Azemoon, H. Suter, Y.F. Wang, V. Lalieu, A. Degré, E. Dénes, R. Sehgal, Simonetta Gentile, Mingshui Chen, Mw Gruenewald, G. B. Mills, G. Morand, B.C. Stringfellow, M. Yzerman, V. Koutsenko, P. A. Piroué, T. Böhringer, P. Marchesini, Alexei Klimentov, C. Camps, Vincenzo Innocente, C. G. Yang, Xd Cai, Valentin V. Khoze, R. Dolin, I. Sheer, Marcos Cerrada, R. Magahiz, Ming Zeng, J. D. Swain, J.P. Burq, Kenneth Francis Read, S. Rosier-Lees, D. H. Zhang, E. Jagel, A. Engler, L. Antonov, G. Conforto, V. Morgunov, G. Finocchiaro, M. Bourquin, K. Strauch, P. Le Coultre, K. S. Kumar, L.S. Hsu, M. Röhner, Yu. Galaktionov, M. Fukushima, C. Maña, J. Perrier, U. Roeser, D. Hauschildt, B. N. Jin, K. Freudenreich, D. Ren, W. Wallraff, Guofan Hu, R. L. Summer, J. Salicio, J. Alcaraz, L. Baksay, Marco Meschini, K. Hangarter, R. Malik, Jozsef Toth, U. Vikas, J.M. Qian, M. Capell, J. Krizmanic, D. Perret-Gallix, H. S. Fesefeldt, H. O. Cohn, J. Lettry, Claudio Luci, A. Contin, K. N. Qureshi, Alexander Savin, Yanwen Liu, L. Z. Sun, Y.F. Mao, A. Marchionni, R. Starosta, Elisabetta Gallo, V.R. Krastev, R. Liu, G. Gratta, D. Luckey, Gy L. Bencze, A. Böhm, Cheng Chen, B. Stöhr, J. M. Le Goff, E. Gonzalez, Reinhard W. Schulte, D. Kirkby, H. R. Gustafson, S. S. Gau, P.V.K.S. Baba, Z. W. Yin, C.Y. Chien, T.J. Wenaus, C. Zaccardelli, W. W. Kinnison, Chenliang Wang, G. S. Sanders, Z.F. Gong, S. N. Ganguli, Zhuoxiang Ren, G. Coignet, J. A. Rubio, M. Wadhwa, R.J. Wu, A. Sopczak, H. L. Zhuang, S. Lanzano, Bernardo Adeva, Giovanni Paternoster, Wolfgang Stoeffl, I. Scott, Federico Carminati, S. Reucroft, Manjit Kaur, C. Timmermans, G. Schwering, J. M. You, H. Anderhub, P. McBride, An.A. Vorobyov, T. Matsuda, N. Produit, H. Fenker, A.M. Cartacci, C-Q. Li, J.M. Lubbers, L. Zehnder, H.R. Dimitrov, H. Akbari, D. Antreasyan, Zhen Zhang, G. A. Yang, O. Adriani, Lucas Taylor, R. Bizzarri, S. Hancke, Ian Brock, F. DeNotaristefani, J.C. Sens, J. D. Burger, G. Mirabelli, G. Rahal-Callot, W. J. Metzger, L. Leistam, X. L. Wang, S. Patricelli, M.C. Chen, J.B. Ye, O. Rind, K. Schultze, E. Tarkovsky, S. Banerjee, T. Kramer, P. Berges, D. Lanske, Hafeez R. Hoorani, K. Lübelsmeyer, Piero Spillantini, M. Maire, J. J. Blaising, Q. Ye, S. Schulte, W. Ruckstuhl, D. P. Stickland, Y. Mir, C. H. Ye, Y.J. Pei, Lamberto Luminari, M. Vivargent, Christine Buisson, R. de Asmundis, W. Böhlen, H. Haan, Wolfgang Lohmann, H. Vogt, Mariagrazia Alviggi, B. Bertucci, J. Fehlmann, Z. M. Wang, I. Vetlitsky, Pierre Lecomte, G. Sartorelli, Nicanor Colino, Y. H. Chang, George Alverson, C. Dionisi, R. T. Van de Walle, Vineet Kumar, V. Shevchenko, Pablo Garcia-Abia, Alain Hervé, B. Borgia, A. Bay, P.G. Seiler, F. Ferroni, Y. Zeng, F. Diez-Hedo, J. Ulbricht, A. van Laak, Peter Denes, Paolo Bagnaia, Carlo Civinini, Y. Mi, M. Maolinbay, S. C. Tonwar, X.R. Shi, I. Clare, Frank Filthaut, Thomas Ferguson, X.G. Li, J. Busenitz, P. Göttlicher, D.J. Schotanus, M. Aguilar-Benitez, I. Duran, Herwig Schopper, R. Leiste, M. White, Petr Levchenko, S. Röhner, C. Spartiotis, F. Wittgenstein, M. Gailloud, R. Morand, Z. L. Xue, L. Ludovici, E. Drago, L. Niessen, Sau Lan Wu, Howard A. Stone, T.S. Dai, F. Tonisch, Q. Fan, D. Zhang, M. Harris, J.G. Branson, O. Fackler, E. Thomas, J.H. Wang, Zhongyukun Xu, P. K. Malhotra, H. A. Rizvi, A. Kunin, H. van der Graaf, M. Hebert, R. Wilhelm, F. Carbonara, L. Martinez, F. L. Linde, Luciano Romero, Bolek Wyslouch, Qian Wang, J. Behrens, P. J. Li, P. Lebrun, Fridolin Dittus, BT Bouwens, U. Uwer, A. Chen, X. Lue, U. K. Chaturvedi, Y. S. Lu, Jérôme Rose, J. H. Field, G. Trowitzsch, C. F. He, A. Pevsner, Barry Blumenfeld, Valery Schegelsky, Antonino Zichichi, Ph Fisher, H. Rykaczewski, Y. Karyotakis, A. Arefiev, Aa Vorobyov, Jean Fay, M. Dhina, D. Boutigny, F. Crijns, Z. Y. Lin, F. Marzano, W. Krenz, Samuel C.C. Ting, Steven Goldfarb, R.B. Sutton, G. Passaleva, M. MacDermott, M. A. Niaz, S. X. Wu, D. DiBitonto, M. Steuer, G. Forconi, J. Weber, P. Extermann, I. Leedom, B. Z. Yang, H. Hofer, K. L. Tung, Egidio Longo, G. J. Bobbink, M. M. Ilyas, R. Fabbretti, M. Lenti, A. L. Anderson, Ying Wu, J. F. Zhou, M. Vollmar, D. Wright, D.W. Schmitz, G.G.G. Massaro, Robert Clare, Ph. Rosselet, Thomas Hebbeker, Paul Lecoq, R. W. Kraemer, M. Napolitano, H. S. Chen, B. Monteleoni, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, and IHEF (IoP, FNWI)
Subjects: Physics, Nuclear and High Energy Physics, Antiparticle, Particle physics, Annihilation, 010308 nuclear & particles physics, Elementary particle, 01 natural sciences, 7. Clean energy, Massless particle, Particle decay, Excited state, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Neutrino, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Particle Physics - Experiment, Lepton
Abstract: We have searched for the excited electron neutrino produced from Z 0 decays in the channel e + e − →νν ∗ using the L3 detector at LEP. The decays ν ∗ →eW and ν ∗ →νγ have been investigated. We have determined an upper limit on the Zνν ∗ coupling as a function of m ν ∗ up to the Z 0 mass.
Published: 1990
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9. A determination of electroweak parameters from $Z^{0}$ decays into charged leptons

Author: Samuel C.C. Ting, A. A. Syed, Luciano Romero, Bolek Wyslouch, Steven Goldfarb, G. Passaleva, B.C. Stringfellow, C. F. He, H. van der Graaf, F. Crijns, D. DiBitonto, A. Pevsner, F. Ferroni, T. Kramer, G. Landi, A. Engler, M. Gruenewald, G. Finocchiaro, Barry Blumenfeld, J. J. Blaising, L. Antonov, M. MacDermott, Zhen Zhang, H. Anderhub, Y. Zeng, M. Merk, M. A. Niaz, R. de Asmundis, M. J. Glaubman, G. Mirabelli, P. Vikas, J. Perrier, H. El Mamouni, H. Haan, Mariagrazia Alviggi, C. J.W.P. Timmermans, X. Lue, R. Rosmalen, P. Extermann, K. Lübelsmeyer, Piero Spillantini, Valery Schegelsky, I. Leedom, B. Z. Yang, U. K. Chaturvedi, C. Rippich, Antonino Zichichi, P. Arce, D. Goujon, Vincenzo Innocente, R. Liu, R. Leiste, Ph Fisher, Y. S. Lu, J. Krizmanic, A. Marchionni, V.R. Krastev, H. Hofer, K. L. Tung, C. Buisson, Raffaello D'Alessandro, Igor Vorobiev, H. Rykaczewski, Qiang Li, M. Sachwitz, S. X. Wu, Y. Karyotakis, U. Roeser, R. Weill, M. Möller, M. Hebert, J. Alcaraz, Panos A Razis, E. Gonzalez, I. Vetlitsky, K. Sudhakar, C. Grinnell, Jérôme Rose, S. Lanzano, Bernardo Adeva, U. Herten, P.V.K.S. Baba, Ph. Rosselet, Y. Mi, P. Blömeke, A.M. Cartacci, J. H. Field, G. Trowitzsch, Leonardo Merola, Z.F. Gong, Jean Fay, M. Dhina, R. W. Kraemer, C-Q. Li, H. L. Zhuang, M. Steuer, R.C. Ball, G. Forconi, M. Lenti, D. Pandoulas, T. McMahon, Yanwen Liu, A. Gordeev, M. Micke, D. Boutigny, R.B. Sutton, J. Weber, T. Spickermann, A. L. Anderson, Z. Y. Lin, R. Bizzarri, S. Hancke, Helmut Vogel, J. M. Salicio, Adrian Biland, U. Micke, Ying Wu, J. F. Zhou, Ian Brock, Ren-Yuan Zhu, Luciano Barone, L. Leistam, O.F. Wang, D. Linnhofer, E. Valente, T. Azemoon, C. Spartiotis, L. Urbàn, G. Chiefari, S. Shevchenko, H.R. Dimitrov, Z.Q. Yang, Bernard Ille, R. Magahiz, E. Thomas, J.H. Wang, Zhongyukun Xu, P. K. Malhotra, H. A. Rizvi, A. Kunin, K.D. Shmakov, S. S. Gau, S. C. Tonwar, L.S. Hsu, R. Mount, Q. Fan, Q.Y. Yang, J. D. Swain, P. McBride, G.B. Mills, A. Arefiev, Qi An, P. Berges, Mingshui Chen, Marcos Cerrada, R. Malik, Kajari Mazumdar, Egidio Longo, J.C. Sens, S. Khokhar, Aa Vorobyov, C. Maña, Thomas Ferguson, A. Gurtu, Jozsef Toth, V. Commichau, H. J. Schreiber, J. Lettry, Claudio Luci, M. Maire, L. Li, S. Lökös, D. Duchesneau, J. Berdugo, R. Morand, K.S. Yang, Z. L. Xue, Th. Rombach, M. Capell, B. N. Jin, A. Böhm, J. D. Burger, D.N. Mao, V. Morgunov, G. Rahal-Callot, Dimitri Bourilkov, D. McNally, Alexander Malinin, R. Wilhelm, W. J. Metzger, G. Paternoster, Simonetta Gentile, B. Monteleoni, Yu. Galaktionov, D. Ren, L. J. Gutay, M. M. Ilyas, R. Fabbretti, Yu. Kamyshkov, H. S. Chen, F. Carbonara, Elisabetta Gallo, M. Bocciolini, Howard A. Stone, T.S. Dai, A. Hasan, F. Tonisch, Chenliang Wang, Kenneth Francis Read, Y. D. Xu, Zhuoxiang Ren, D. Perret-Gallix, H. S. Fesefeldt, G. Conforto, G. Coignet, M. Wadhwa, D. J. Schotanus, Lamberto Luminari, J. M. You, W. Kittel, J.F. Li, Xd Cai, F. Cesaroni, J. Y. Liao, U. Becker, M. Gailloud, G. Schwering, F. Marzano, W. Krenz, U. Vikas, E. Nagy, A. Contin, N. Produit, R. Raghavan, G. Sauvage, D.W. Schmitz, G.G.G. Massaro, Robert Clare, A. C. König, Y.P. Tong, E. Isiksal, Alexander Savin, K. Schultze, L. Martinez, F. L. Linde, E. Tarkovsky, S. Reucroft, H.S. Chen, P. Schmitz, Alexei Klimentov, C. Camps, V. Shevchenko, J. Fehlmann, H. Fenker, B. Borgia, M.C. Chen, T. Angelov, X. Leytens, G. Viertel, H. Suter, Y.F. Wang, Valentin V. Khoze, J. Behrens, P. J. Li, J. Schütte, M. Guanziroli, G. A. Yang, M. Schneegans, Harvey B Newman, D. Lanske, Cheng Chen, J. P. Martin, B. Stöhr, C. G. Yang, Pierre Lecomte, K. Hilgers, A. van Laak, K. Lanius, G. Hu, P. Lebrun, L. Zehnder, Fridolin Dittus, Thomas Hebbeker, C. Zaccardelli, Paul Lecoq, E. Shumilov, A. Bujak, M. Schöntag, K. Freudenreich, P.G. Seiler, F. Diez-Hedo, W. Böhlen, V. Shoutko, S.J. Fan, K. S. Kumar, J.P. Burq, Carlos Willmott, Peter Denes, S. Schulte, J.B. Ye, Speranza Falciano, J.M. Qian, Paolo Bagnaia, F. J. Eppling, L. W. Jones, M. Napolitano, Guo-Ming Chen, S. Banerjee, S. Morganti, U. Uwer, M. Tonutti, J. Schwenke, H. T. Li, Marco Meschini, J. Wenninger, I. Clare, D. Kirkby, X.R. Shi, P. Göttlicher, J. Salicio, X. Y. Cui, H. R. Gustafson, W. Ruckstuhl, D. S. Yan, D. P. Stickland, L. Vuileumier, S. M. Ting, S. Beingessner, An.A. Vorobyov, T. Matsuda, Y. Mir, C. H. Ye, Sc Yeh, G. Fernandez, Tariq Aziz, O. Adriani, Y.J. Pei, Lucas Taylor, Wolfgang Lohmann, H. Vogt, B. Bertucci, D. Zhang, J. Ulbricht, J. Mnich, M. Bourquin, W. Friebel, Nicanor Colino, K. Strauch, T. Foreman, P. Duinker, D. Antreasyan, J. Bao, Zheng Wang, Federico Carminati, F. de Notaristefani, Andre Sopczak, K. N. Qureshi, Y. H. Chang, George Alverson, M.L. Chen, Crisostomo Sciacca, Vineet Kumar, M. Chemarin, Marco Pieri, Marcella Diemoz, S. Patricelli, Q. Ye, Wen-Gan Ma, G. Von Dardel, A. Degré, Konrad Deiters, M. Vollmar, T. Böhringer, P. Marchesini, Alberto Aloisio, Ming Zeng, M. Röhner, D. Wright, R. L. Summer, Th. Meinholz, L. Baksay, G. Gratta, X. W. Tang, I. Sheer, P. A. Piroué, Y.F. Mao, C.Y. Chien, R. T. Van de Walle, I. Scott, T.J. Wenaus, Manjit Kaur, H. Akbari, Daqiang Zhang, C. Dionisi, A. Chen, Pablo Garcia-Abia, Alain Hervé, A. Bay, Carlo Civinini, M. Maolinbay, X.G. Li, M. Aguilar-Benitez, I. Duran, Herwig Schopper, M. White, Petr Levchenko, S. Röhner, F. Wittgenstein, L. Ludovici, E. Drago, L. Niessen, Sau Lan Wu, M. Harris, E. Dénes, R. Sehgal, L. Z. Sun, X. L. Wang, M. Vivargent, Z. M. Wang, B. Spiess, V. Lalieu, F. Bruyant, R. Dolin, M. Fukushima, J. M. Le Goff, J. A. Rubio, V. Koutsenko, E. Jagel, G. Herten, W. Wallraff, Guofan Hu, G. Faber, J. G. Branson, A. Kuhn, J. A. Bakken, Z. W. Yin, S. N. Ganguli, V. Plyaskin, V. Pojidaev, Nikita Smirnov, B. P. Roe, B. L. Betev, G. Sartorelli, Oliver Kornadt, M. Pohl, G. Morand, M. Fabre, Georgi Sultanov, R. A. Khan, T. Driever, J. Busenitz, V. P. Andreev, G.J. Bobbink, R.J. Wu, J.M. Lubbers, O. Rind, Hafeez R. Hoorani, S. Rosier-Lees, P. Le Coultre, G. H. Wang, K. Hangarter, R. Starosta, D. Luckey, Gy L. Bencze, Reinhard W. Schulte, F. C. Erné, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), L3, and IHEF (IoP, FNWI)
Subjects: Physics, Coupling constant, Nuclear and High Energy Physics, Muon, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, Electroweak interaction, Weinberg angle, Electron, 01 natural sciences, 7. Clean energy, Asymmetry, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Particle Physics - Experiment, Lepton, media_common
Abstract: We have measured the partial widths for the three reactions e + e − → Z 0 → e + e − , μ + μ − , τ + τ − . The results are Γ ee = 84.3±1.3 MeV, √ Γ ee Γ μμ =83.9±1.4 MeV, and √ Γ ee Γ ττ =83.9±1.4 MeV, where the errors are statistical. The systematic errors are estimated to be 1.0 MeV, 0.9 MeV, and 1.4 MeV, respectively. We perform a simultaneous fit to the cross sections for the e + e − →e + e − , μ + μ − , and τ + τ − data, the differential cross section as a function of polar angle for the electron data, and the forward- backward asymmetry for the muon data. We obtain the leptonic partial with Γ ll =84.0±0.9 (stat.) MeV. The systematic error is estimated to be 0.8 MeV. Also, we obtain the axial-vector and vector weak coupling constants of charged leptons, g A =−0.500±0.003 and g ν =−0.064 −0.013 +0.017 .
Published: 1990

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1. An investigation of the very rare $ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $ decay

2. Searches for lepton number violating $K^+$ decays

3. Search for lepton flavour violation in Z$^0$ decays

4. Search for neutralinos in Z decays

5. Inclusive J production in Z$^0$ decays

6. Determination of the number of light neutrino species

7. Measurement of electroweak parameters from hadronic and leptonic decays of the Z$^0$

8. Search for excited neutrinos from Z$^0$ decays

9. A determination of electroweak parameters from $Z^{0}$ decays into charged leptons

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