1. Measurement of the lifetime of tau-lepton
- Author
-
U. Mjoernmark, Edoardo Castelli, F. Pierre, P. Allen, G. W. Van Apeldoorn, R. J. Apsimon, L. Ventura, V. Ruhlmann, Roland Horisberger, L. Bugge, D. Z. Toet, G. Hamel de Monchenault, Andrey Korytov, G. Ekspong, Itzhak Roditi, Gueorgui Chelkov, Pierre Juillot, M. De Beer, M. Bonesini, Y. Sacquin, Josef Strauss, M.A. Lopez Aguera, Francesca Romana Cavallo, Hans Muller, B. Koene, J.A.M.A. Buytaert, W. Venus, L. Di Ciaccio, Jan Krolikowski, N. N. Khovanski, Mitchell Wayne, M. S. Bilenky, G. Tristam, L.J. Carroll, W. Bartl, R. Pain, P. N. Bogolubov, M. J. Bates, J. A. Valls Ferrer, Giovanni Darbo, Christine Kourkoumelis, P. Siegrist, V. V. Lapin, N. Crosland, S. Simonetti, M. Begalli, E. Dahl-Jensen, Paolo Morettini, J. G. Loken, C. De Clercq, Klaus Hamacher, J. P. Laugier, Natale Demaria, R. Lucock, M. Richardson, G. Meola, Toralf Bernhard Skaali, M. Boratav, D. Gamba, P. Beilliere, M. Battaglia, T. Bolognese, W. J. Murray, R. Strub, J-C. Marin, Spyros Tzamarias, G. Cosme, A. Perrotta, G. Borisov, George Kalkanis, P. B. Renton, G. Voulgaris, M. Pimenta, B. A. Khomenko, M. Baubillier, V. Canale, S. Gumenyuk, R. A. Brenner, Stavros Maltezos, M. Bonapart, O. Barring, Y. Dufour, P. D. Dauncey, Sandor Czellar, D. C. Fries, Patrick Jarry, S. J. Alvsvaag, C. Vander Velde, N. De Groot, G. Rinaudo, G. Sette, A. Elliot Peisert, A. Stocchi, Francesco Navarria, J. Zúñiga, P. Astier, W. Bonivento, P. Weilhammer, A. M. Zaitsev, Alexander Vodopyanov, F. Bianchi, G. Vegni, N. Brummer, J. Bjarne, P. O. Hulth, T. Tabarelli, P. Van Dam, M. Davenport, G. Polok, A. Ruiz, Winfried Mitaroff, E. Lieb, P. Antilogus, C. Lambropoulos, Ugo Amaldi, W. De Boer, E. Zevgolatakos, G. Matthiae, Marta Calvi, P. Delpierre, I. Herbst, M. Matveev, R. Mc Nulty, I. Lippi, W. Kucewicz, E. K. Johansson, J. Pyyhtia, Geoffrey Smith, D. Johnson, Louis Lyons, W. Klempt, Renato Turchetta, H. De Boeck, S. Tavernier, G. Wormser, E. Daubie, G. E. Theodosiou, Mogens Dam, D. Fassouliotis, Ariella Cattai, F. Couchot, M. Kopf, M. Tyndel, S. C. Blyth, O. Pingot, G. Wilkinson, M.D.M. De Fez Laso, Juan Fuster, Jacques Lemonne, J. Sanchez, C. Bosio, E.N. Tsyganov, J. H. Wickens, Jose Luis Contreras, T. Kreuzberger, J. Derkaoui, S. Braibant, S. Dagoret, F. Stichelbaut, D. Zavrtanik, A. Tilquin, S. O. Holmgren, L. S. Vertogradov, J. Maillard, M. T. Trainor, P. Vaz, R. Sosnowski, O. Ullaland, Leif J. Jönsson, G. Myatt, F. Adami, V. G. Timofeev, A. G. Frodesen, Pawel Jalocha, Barry King, G. Smadja, L. Mathis, D. Husson, Ugo Gasparini, A. Pullia, J.M. Gago, D. Bertrand, J. Timmermans, I. A. Tyapkin, B.D. Hyams, T. S. Spassoff, Torsten Paul Ake Åkesson, Demetrios Loukas, R. Keranen, Philippe Charpentier, Francisco Matorras, N. Yamdagni, U. Trevisan, H. Furstenau, R. Frühwirth, L. O. Eek, R. C. Shellard, Josef Hrubec, A. M. Segar, A. G. Olshevski, B. Boštjančič, V. Perevozchikov, Theodora Papadopoulou, B. Korzen, Jon Christopher Wikne, C. Defoix, E. I. Rosenberg, A. Campion, S. Volponi, B. Dalmagne, F. Fulda-Quenzer, H. P. Borner, Stefan Schael, A. Lipniacka, Paul Baillon, Alexander Lincoln Read, M. Szeptycka, Tiziano Camporesi, A.J. Camacho Rozas, Abdenour Lounis, M.-H. Gros, Laurent Chevalier, M. Fernandez Alonso, D. Radojicic, V. Obraztsov, Jan Ridky, P. Folegati, Z. Hajduk, K. Kurvinen, Maciej Górski, W. Ruckstuhl, Borge Svane Nielsen, J. J. Lozano, Guido Barbiellini, R. Zukanovich Funchal, B. Franek, H. Wahlen, Ariel Goobar, E. Graziani, P. S. Iversen, F. Fontanelli, Maria Roberta Monge, A. Zalewska, Krzysztof Doroba, N. G. Redaelli, R. Moeller, A. Hakansson, Chiara Meroni, J. H. Koehne, Marco Bozzo, T. Hofmokl, Marek Szczekowski, J. M. Brunet, H. Foeth, Roberto Cirio, I. Roncagliolo, L. K. Resvanis, J. E. Hooper, J. Guy, P. Lutz, W. Krupinski, W. T. Meyer, P. V. Chliapnikov, Tord Ekelof, H. Staeck, D. Benedic, P. Abreu, P. Borgeaud, J. P. Gerber, Tim Adye, E. Rosso, H. Klein, P. Beltran, Peter Kluit, F. Naraghi, P. Frenkiel, K. H. Becks, E. Vallazza, Milos Lokajicek, J. Cuevas Maestro, A. Chan, B. Ueberschaer, Massimo Caccia, H. J. Hilke, D. J. Holthuizen, F. Waldner, S. Haider, Antonio Ferrer, Tuure Tuuva, F. Simonetto, F. Kapusta, K. W. Glitza, Clara Troncon, G. Leder, B. Åsman, W.S.C. Williams, J.-E. Augustin, F. Ledroit, E.N. Gazos, M. Schaeffer, B. Loerstad, Eilam Gross, B. Nijjhar, E. Menichetti, Stefano Ragazzi, K. Furnival, C. Walck, A. De Angelis, P. Collins, D. Delikaris, Vladimir Nikolaenko, C. Caso, J. Drees, Fernand Grard, A. Passeri, D. Crennell, F. Mandl, T. Todorov, H. Burmeister, N. van Eijndhoven, J. Werner, L. Tortora, F. J. Harris, C. De La Vaissiere, C. J. Beeston, Daniel Bloch, F. Cao, Ahmimed Ouraou, Wolfgang Adam, M. L. Turluer, B. W. Heck, M. Mazzucato, P. Szymanski, Robert S. Brown, V.M. Golovatyuk, Carlos Lacasta, K. D. Brand, N. I. Zimin, Krzysztof A. Rybicki, H. B. Crawley, D. Isenhower, A. Pinsent, D. Wormald, K. Woschnagg, A. De Min, Joao Varela, V. Falaleev, M. Dracos, J. J. Gomez Y Cadenas, V. Chorowicz, D. Reid, Yu. Belokopytov, S. Squarcia, Matteo Pegoraro, E. C. Katsoufis, G. Gopal, E. G. Anassontzis, R. Holmes, H. Saarikko, M. Voutilainen, G. Grosdidier, W. Dulinski, K. A. J. Forbes, S. D. Hodgson, S. Ueberschaer, G. Galeazzi, J. P. Engel, P. Bambade, K. Moenig, M. V. Castillo Gimenez, E. J. Sanchez, M. Crozon, T. Buran, Gianni Zumerle, P. Roudeau, Alessandra Romero, J. Kesteman, A. Maltezos, G. Damgaard, F. Verbeure, C. Bricman, M. A E Schyns, Martino Margoni, P. F. Honore, E. Fokitis, G. D. Alekseev, Olga Botner, M. Michelotto, V. Gracco, Pavlos Ioannou, Krzysztof Korcyl, A. N. Sissakian, R. Llosa, Claudia J. Stubenrauch, Carmen García, B. Jean-Marie, Mario Sannino, Eleuterio Spiriti, P. Poropat, Andromachi Tsirou, M. A. Houlden, M. Mc Cubbin, K. Hultqvist, Georgios Stavropoulos, P. David, Andre Augustinus, W. K. Van Doninck, F. Richard, W.-D. Apel, C. Matteuzzi, M. Hahn, D. Vilanova, S. Almehed, F. Hahn, S. Marti, U. Kruener-Marquis, Paolo Ronchese, N. J. Kjaer, Paula Eerola, Lucio Cerrito, M. A. Winter, G. E. Kalmus, H. Palka, G. Skjevling, J. W. Lamsa, F. Barao, T. Henkes, B. De Lotto, G. Crosetti, Evgueni Vlasov, E. Higon, R. Seufert, H. Herr, F. Scuri, A. M. Wetherell, L. G. Tkatchev, Jmv Garcia, L. Lanceri, A. Firestone, M. Vollmer, U. Rossi, Paolo Giacomelli, R. Sekulin, S. Delorme, M. Zito, J. J. Hernandez, T. Moa, G. Maehlum, B. Grossetete, Allan Hallgren, Giovanni Valenti, Antonio Baroncelli, Guenakh Mitselmakher, Fares Djama, José Salt, L. Vibert, M. Jonker, William Trischuk, A. Markou, Cristian Stanescu, P. Branchini, H. Schneider, R. Lauhakangas, Tiziano Rovelli, Mikael Berggren, G. Kantardjian, M. Sessa, M. Los, V. Lepeltier, M. Donszelmann, H. Forsbach, C. Ronnqvist, Paolo Checchia, G. Zhang, A. P. Ostankov, Ph. Gavillet, R. Gokieli, Dietrich Liko, P. Privitera, V. Kostukhin, R. Zitoun, M. Turala, Luc Pape, P. Herquet, R. Contri, Piotr Zalewski, U. Nau-Korzen, Manolis Dris, E. Lillethun, V.A. Uvarov, Daniel Treille, J. N. Jackson, P. Kokkinias, J. Lindgren, Nikita Smirnov, F. Carena, Pierre Billoir, M. Pernicka, I. Hietanen, Jose M. Benlloch, A. Grant, Vaclav Vrba, Hans Dijkstra, G. Lenzen, J. E. Campagne, M. Koratzinos, P. Negri, J.H. Bibby, Göran Jarlskog, A. Letessier-Selvon, J. Dolbeau, P.S.L. Booth, P. N. Ratoff, A. Lopez-Fernandez, J. Marco, M. P. Clara, Maria Elena Pol, S. Katsanevas, D. Y. Bardin, T. A. Filippas, M. Regler, P. Yepes, H. Mueller, C. O. Higgins, B. Bouquet, R. Orava, A. Klovning, 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, Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., Balandras, A., Banerjee, S., Barczyk, A., Barillere, R., Barone, L., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., V, B., Brochu, F., Buffini, A., Buijs, A., Burger, J. D., Burger, W. J., Cai, X. D., Campanelli, M., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, M., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, Giovanni, Cifarelli, L., Cindolo, F., Civinini, C., I, C., Clare, R., Coignet, G., Colijn, A. P., Colino, N., Costantini, S., Cotorobai, F., Cozzoni, B., B. d., La, Csilling, A., Cucciarelli, S., Dai, T. S., Van, J. A., D'Alessandro, R., Asmundis, R. d., Deglon, P., Degre, A., Deiters, K., DELLA VOLPE, Domenico, Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierendonck, D. v., Lodovico, F. D., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M. T., Duchesneau, D., Dufournaud, D., Duinker, P., I, D., Mamouni, H. E., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabre, M., Faccini, R., Falagan, M. A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., I, F., Forconi, G., Fredj, L., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gau, S. S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gulik, R. v., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hasan, A., Hatzifotiadou, D., Hebbeker, T., Herve, A., Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Sr, H., Hu, Y., I, I., Jin, B. N., Jones, L. W., Jong, P. d., I, J., Khan, R. A., Kaur, M., Kienzle Focacci, M. N., Kim, D., Kim, J. K., Kirkby, J., Kiss, D., Kittel, W., Klimentov, A., Konig, A. C., Kopp, A., V, K., Kraber, M., Kraemer, R. W., Krenz, W., Kruger, A., Kunin, A., P. L., De, I, L., Landi, G., Lassila Perini, K., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., Lee, H. J., J. M., Le, Leiste, R., Leonardi, E., Levtchenko, P., Li, C., Lokhoded, S., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Lugnier, L., Luminari, L., Lustermann, W., W. G., Ma, Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Mans, J., Marchesini, P., Marian, G., Martin, J. P., Marzano, F., G. G. G., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Molnar, P., Monteleoni, B., Moore, R., Moulik, T., Muanza, G. S., Muheim, F., A. J. M., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Organtini, G., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., V, P., Pohl, M., Postema, H., Pothier, J., Produit, N., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Raspereza, A., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Rhee, T. v., Riemann, S., Riles, K., Robohm, A., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruschmeier, D., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., V, S., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Sciarrino, D., Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Tellili, B., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., I, V., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vogel, H., Vogt, H., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xia, L., Z. Z., Xu, Yamamoto, J., Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., J. B., Ye, Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Ziegler, F., Zilizi, G., Zoller, M., L3 (IHEF, IoP, FNWI), LEP (IHEF, IoP, FNWI), Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Pohl, Martin, Sciarrino, Deborah, Aguilarbenitez, M., Ahlen, S., Alpat, B., Alverson, G., Antreasyan, D., Ball, R. C., Banicz, K., Baschirotto, A., Bilei, G. M., Bock, R., Boucham, A., Boutigny, D., Brigljevic, V., Brock, I. C., Busenitz, J., Buytenhuijs, A., Caria, M., Chan, A., Cheng, H. S., Chen, M., Chien, C. Y., Choi, M. T., Clare, I., Cohn, H. O., Cotorbai, F., Delacruz, B., Dalessandro, R., Deasmundis, R., Deboeck, H., Dibitonto, D., Vandierendonck, D., Dilodovico, F., Dorne, I., Drago, E., Duran, I., Dutta, S., Easo, S., Efremenko, Y., Elmamouni, H., Ernenwein, J. P., Fenyi, B., Fernandez, D., Garciaabia, P., Gerald, J., Goldfarb, S., Goldstein, J., Gougas, A., Gratta, G., Hangarter, K., Hartmann, B., Vanhoek, W. C., Hou, S. R., Hu, G., Innocente, V., Janssen, H., Dejong, P., Josamutuberria, I., Kasser, A., Kamyshkov, Y., Kapinos, P., Kapustinsky, J. S., Karyotakis, Y., Kienzlefocacci, M. N., Kim, S. C., Kim, Y. G., Kinnison, W. W., Kirkby, A., Kirkby, D., Korolko, I., Koutsenko, V., Kuijten, H., Deguevara, P. L., Lapoint, C., Lassilaperini, K., Laurikainen, P., Lecoultre, P., Lee, J. S., Lee, K. Y., Leggett, C., Legoff, J. M., Lieb, E., Lu, W., Lustemann, W., Majumder, G., Mangla, S., Marin, A., Mcnally, D., Vondermey, M., Mi, Y., A. J. W., Morganti, S., Mount, R., Muller, S., Nagy, E., Nahn, S., Nessitedaldi, F., Nippe, A., Ostonen, R., Peach, D., Pei, Y. J., Perretgallix, D., Petrak, S., Pevsner, A., Pinto, J. C., Plyaskin, V., Pojidaev, V., Rahalcallot, G., Rattaggi, M., Read, K., Vanrhee, T., Riemers, B. C., Rind, O., Ro, S., Rodriguez, F. J., Rohner, J. A., Santocchia, A., Sassowsky, M., Sauvage, G., Schegelsky, V., Schmidtkaerst, S., Schmitz, P., Schneegans, M., Sens, J. C., Shoutko, V., Shukla, J., Sopczak, A., Soulimov, V., Stone, H., Strauch, K., Susinno, G. F., Uwer, U., Vandewalle, R. T., Vetlitsky, I., Volkert, R., Vorobiev, I., Wang, J. C., Wittgenstein, F., Xu, J., Yao, X. Y., You, J. M., Zemp, P., Zeng, Y., Zhang, Z., Zhou, B., and Zhou, Y.
- Subjects
COLLISIONS ,Nuclear and High Energy Physics ,Particle physics ,LUND MONTE-CARLO ,PAIR PRODUCTION ,Electron–positron annihilation ,FOS: Physical sciences ,Elementary particle ,ddc:500.2 ,01 natural sciences ,7. Clean energy ,Resonance (particle physics) ,JET FRAGMENTATION ,DECAYS ,High Energy Physics - Experiment ,Nuclear physics ,Particle decay ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,SILICON MICROVERTEX DETECTOR ,PRECISE MEASUREMENT ,Limit (mathematics) ,QCD ANALYSIS ,010306 general physics ,L3 EXPERIMENT ,Coupling constant ,Physics ,Muon ,Annihilation ,TEST BEAM ,E+E-PHYSICS ,010308 nuclear & particles physics ,ALPHA(S) ,High Energy Physics::Phenomenology ,Detector ,Pair production ,SPECTRAL FUNCTIONS ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,High Energy Physics::Experiment ,Particle Physics - Experiment ,Lepton - Abstract
The tau lepton lifetime is measured with the L3 detector at LEP using the complete data taken at centre-of-mass energies around the Z pole resulting in tau_tau = 293.2 +/- 2.0 (stat) +/- 1.5 (syst) fs. The comparison of this result with the muon lifetime supports lepton universality of the weak charged current at the level of six per mille. Assuming lepton universality, the value of the strong coupling constant, alpha_s is found to be alpha_s(m_tau^2) = 0.319 +/- 0.015(exp.) +/- 0.014 (theory). The tau lepton lifetime is measured with the L3 detector at LEP using the complete data taken at centre-of-mass energies around the Z pole resulting in τ τ =293.2 ± 2.0 (stat) ± 1.5 (syst) fs . The comparison of this result with the muon lifetime supports lepton universality of the weak charged current at the level of six per mille. Assuming lepton universality, the value of the strong coupling constant, α s is found to be α s ( m τ 2 ) = 0.319 ± 0.015 (exp) ± 0.014 (theory). The tau lepton lifetime is measured with the L3 detector at LEP using the complete data taken at centre-of-mass energies around the Z pole resulting in tau_tau = 293.2 +/- 2.0 (stat) +/- 1.5 (syst) fs. The comparison of this result with the muon lifetime supports lepton universality of the weak charged current at the level of six per mille. Assuming lepton universality, the value of the strong coupling constant, alpha_s is found to be alpha_s(m_tau^2) = 0.319 +/- 0.015(exp.) +/- 0.014 (theory).
- Published
- 2015