1. A STUDY OF THE DECAYS OF TAU LEPTONS PRODUCED ON THE Z-RESONANCE AT LEP
- Author
-
Abreu, P, Adam, W, Adami, F, Adye, T, Agasi, E, Alekseev, G D, Allen, P, Almehed, S, Alvsvaag, S J, Amaldi, Ugo, Anassontzis, E G, Andreazza, A, Antilogus, P, Apel, W D, Apsimon, R J, Åsman, B, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barate, R, Barbiellini, Guido, Bardin, Dimitri Yuri, Baroncelli, A, Bärring, O, Barrio, J A, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, P N, Bolognese, T, Bonesini, M, Bonivento, W, Booth, P S L, Borgeaud, P, Borisov, G, Börner, H, Bosio, C, Bostjancic, B, Botner, O, Bouquet, B, Bourdarios, C, Bowcock, T J V, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Briand, H, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castelli, Edoardo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Chrin, J T, Cirio, R, Clara, M P, Collins, P, Contreras, J L, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dagoret, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, Evelyne, Daum, A, Dauncey, P D, Davenport, Martyn, David, P, Da Silva, W, Defoix, C, Delikaris, D, Della Riccia, B A, Delorme, S, Delpierre, P A, Demaria, N, De Angelis, A, De Beer, M, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Dijkstra, H, Di Ciaccio, Lucia, Djama, F, Dolbeau, J, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dulinski, W, Eek, L O, Eerola, Paule Anna Mari, Ehret, R, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Fassouliotis, D, Feindt, Michael, Fenyuk, A, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forbes, K A J, Forsbach, H, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Galeazzi, G, Gamba, D, García, C, García, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Gokieli, R, Golovatyuk, V M, Gómez-Cadenas, J J, Goobar, A, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossetête, B, Grosse-Wiesmann, P, Gumenyuk, S A, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Hao, W, Harris, F J, Heck, B W, Henkes, T, Hernández, J J, Herquet, P, Herr, H, Hessing, T L, Hietanen, I, Higgins, C O, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Hulth, P O, Hultqvist, K, Ioannou, P, Isenhower, D, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klempt, W, Klovning, A, Kluit, P M, Köhne, J H, Köne, B, Kokkinias, P, Kopf, M, Korcyl, K, Korytov, A V, Kostukhin, V, Kourkoumelis, C, Kuznetsov, O, Kramer, P H, Królikowski, J, Kronkvist, I J, Krstic, J, Krüner-Marquis, U, Krupinski, W, Kulka, K, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, Georg, Lepeltier, V, Letessier-Selvon, A A, Lévy, J M, Lieb, E H, Liko, D, Lillethun, E, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Lörstad, B, Lokajícek, M, Loken, J G, López-Aguera, M A, López-Fernandez, A, Los, M E, Loukas, D, Lozano-Bahilo, J, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Maron, T, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Meola, G, Meroni, C, Meyer, W T, Michelotto, M, Mikulec, I, Mitaroff, Winfried A, Mitselmakher, G, Mjörnmark, U, Moa, T, Møller, R, Mönig, K, Monge, M R, Morettini, P, Müller, H, Murray, W J, Muryn, B, Myatt, Gerald, Naraghi, F, Navarria, Francesco Luigi, Negri, P, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Niss, P, Obraztsov, V F, Olshevskii, A G, Orava, Risto, Ostankov, A P, Österberg, K, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Passeri, A, Pegoraro, M, Pennanen, J, Perevozchikov, V, Pernicka, Manfred, Perrotta, A, Petrolini, A, Pierre, F, Pimenta, M, Pingot, O, Pol, M E, Polok, G, Poropat, P, Privitera, P, Pullia, Antonio, Radojicic, D, Ragazzi, S, Ratoff, P N, Read, A L, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, S, Rossi, U, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Sajot, G, Salt, J, Sánchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, M A E, Sciolla, G, Scuri, F, Segar, A M, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skaali, T B, Skjevling, G, Smadja, G, Smith, G R, Sosnowski, R, Spassoff, Tz, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stapnes, Steinar, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Tavernier, Stefaan, Chikilev, O G, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Toker, O, Torassa, E, Tortora, L, Trainor, M T, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turchetta, R, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, Van der Velde, C, van Apeldoorn, G W, van Dam, P, Van Doninck, W K, Varela, J, Vaz, P, Vegni, G, Ventura, L, Venus, W A, Verbeure, F, Vertogradov, L S, Vilanova, D, Vitale, L, Vlasov, E V, Vlassopoulos, S, Vodopyanov, A S, Vollmer, M, Volponi, S, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Wehr, A, Weierstall, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wikne, J, Wilkinson, G R, Williams, W S C, Winter, M, Wormald, D, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zitoun, R, Zukanovich-Funchal, R, Zumerle, G, Zúñiga, J, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), 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), DELPHI, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), UCL - SST/IRMP - Institut de recherche en mathématique et physique, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Particle physics ,E+E ANNIHILATION ,POLARIZATION ,Physics and Astronomy (miscellaneous) ,Electron–positron annihilation ,MONTE-CARLO SIMULATION ,RADIATIVE-CORRECTIONS ,PHOTON CORRECTIONS ,BHABHA SCATTERING ,JET FRAGMENTATION ,PERTURBATIVE QCD ,HIGH-ENERGIES ,PHYSICS ,Elementary particle ,01 natural sciences ,7. Clean energy ,Nuclear physics ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Quantum field theory ,Born approximation ,010306 general physics ,Engineering (miscellaneous) ,Physics ,Coupling constant ,010308 nuclear & particles physics ,Electroweak interaction ,Weinberg angle ,Physique des particules élémentaires ,Particle Physics - Experiment ,Lepton - Abstract
From the analysis of a data sample corresponding to an integrated luminosity of 4.63 pb-1 taken during the 1990 run of LEP at centre of mass energies between 88.2 GeV an 94.2 GeV, the tau decays {Mathematical expression} and their charge conjugates have been studied. The following branching ratios have been measured; {Mathematical expression}, {Mathematical expression}, Br(τ- → π- (K-)vτ)=11.9±0.7±0.7%, BR (τ- → ρ- vτ)= 22.4±0.8±1.3%, in good agreement with world averages. The measured electronic and muonic branching ratios lead to a measurement of the strong coupling constant, αs (mτ) = 0.26-0.12 +0.09. Extrapolating the αs value from mτ to mZ yields αs (mZ) = 0.109-0.028 +0.012. The average polarization Pτ of taus produced in Z → τs τs decays has also been measured using the above decay modes. The weighted mean of the polarizations obtained from the four decay modes is Pτ=-0.24±0.07. This value of Pτ gives, in the improved Born approximation, a ratio between the axial and vector coupling constants of the tau of υτ/aτ = 0.12 ± 0.04, and hence a value of the effective electroweak mixing parameter sin2 θW(mZ 2). © 1992 Springer-Verlag., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2016
- Full Text
- View/download PDF