@article{3075405, title = "Measurement of the τ lepton lifetime", author = "Buskulic, D. and Casper, D. and De Bonis, I. and Decamp, D. and Ghez, P. and Goy, C. and Lees, J.-P. and Lucotte, A. and Minard, M.-N. and Odier, P. and Pietrzyk, B. and Ariztizabal, F. and Chmeissani, M. and Crespo, J.M. and Efthymiopoulos, I. and Fernandez, E. and Fernandez-Bosman, M. and Gaitan, V. and Garrido, Ll. and Martinez, M. and Orteu, S. and Pacheco, A. and Padilla, C. and Palla, F. and Pascual, A. and Perlas, J.A. and Sanchez, F. and Teubert, F. and Colaleo, A. and Creanza, D. and De Palma, M. and Farilla, A. and Gelao, G. and Girone, M. and Iaselli, G. and Maggi, G. and Maggi, M. and Marinelli, N. and Natali, S. and Nuzzo, S. and Ranieri, A. and Raso, G. and Romano, F. and Ruggieri, F. and Selvaggi, G. and Silvestris, L. and Tempesta, P. and Zito, G. and Huang, X. and Lin, J. and Ouyang, Q. and Wang, T. and Xie, Y. and Xu, R. and Xue, S. and Zhang, J. and Zhang, L. and Zhao, W. and Bonvicini, G. and Cattaneo, M. and Comas, P. and Coyle, P. and Drevermann, H. and Engelhardt, A. and Forty, R.W. and Frank, M. and Hagelberg, R. and Harvey, J. and Jacobsen, R. and Janot, P. and Jost, B. and Kneringer, E. and Knobloch, J. and Lehraus, I. and Markou, C. and Martin, E.B. and Mato, P. and Minten, A. and Miquel, R. and Oest, T. and Palazzi, P. and Pater, J.R. and Pusztaszeri, J.-F. and Ranjard, F. and Rensing, P. and Rolandi, L. and Schlatter, D. and Schmelling, M. and Schneider, O. and Tejessy, W. and Tomalin, I.R. and Venturi, A. and Wachsmuth, H. and Wiedenmann, W. and Wildish, T. and Witzeling, W. and Wotschack, J. and Ajaltouni, Z. and Bardadin-Otwinowska, M. and Barres, A. and Boyer, C. and Falvard, A. and Gay, P. and Guicheney, C. and Henrard, P. and Jousset, J. and Michel, B. and Monteil, S. and Montret, J.-C. and Pallin, D. and Perret, P. and Podlyski, F. and Proriol, J. and Rossignol, J.-M. and Saadi, F. and Fearnley, T. and Hansen, J.B. and Hansen, J.D. and Hansen, J.R. and Hansen, P.H. and Nilsson, B.S. and Kyriakis, A. and Simopoulou, E. and Siotis, I. and Vayaki, A. and Zachariadou, K. and Blondel, A. and Bonneaud, G. and Brient, J.C. and Bourdon, P. and Passalacqua, L. and Rougé, A. and Rumpf, M. and Tanaka, R. and Valassi, A. and Verderi, M. and Videau, H. and Candlin, D.J. and Parsons, M.I. and Focardi, E. and Parrini, G. and Corden, M. and Delfino, M. and Georgiopoulos, C. and Jaffe, D.E. and Antonelli, A. and Bencivenni, G. and Bologna, G. and Bossi, F. and Campana, P. and Capon, G. and Chiarella, V. and Felici, G. and Laurelli, P. and Mannocchi, G. and Murtas, F. and Murtas, G.P. and Pepe-Altarelli, M. and Dorris, S.J. and Halley, A.W. and Ten Have, I. and Knowles, I.G. and Lynch, J.G. and Morton, W.T. and O'Shea, V. and Raine, C. and Reeves, P. and Scarr, J.M. and Smith, K. and Smith, M.G. and Thompson, A.S. and Thomson, F. and Thorn, S. and Turnbull, R.M. and Becker, U. and Braun, O. and Geweniger, C. and Graefe, G. and Hanke, P. and Hepp, V. and Kluge, E.E. and Putzer, A. and Rensch, B. and Schmidt, M. and Sommer, J. and Stenzel, H. and Tittel, K. and Werner, S. and Wunsch, M. and Beuselinck, R. and Binnie, D.M. and Cameron, W. and Colling, D.J. and Dornan, P.J. and Konstantinidis, N. and Moneta, L. and Moutoussi, A. and Nash, J. and San Martin, G. and Sedgbeer, J.K. and Stacey, A.M. and Dissertori, G. and Girtler, P. and Kuhn, D. and Rudolph, G. and Bowdery, C.K. and Brodbeck, T.J. and Colrain, P. and Crawford, G. and Finch, A.J. and Foster, F. and Hughes, G. and Sloan, T. and Whelan, E.P. and Williams, M.I. and Galla, A. and Greene, A.M. and Kleinknecht, K. and Quast, G. and Raab, J. and Renk, B. and Sander, H.-G. and Wanke, R. and Van Gemmeren, P. and Zeitnitz, C. and Aubert, J.J. and Bencheikh, A.M. and Benchouk, C. and Bonissent, A. and Bujosa, G. and Calvet, D. and Carr, J. and Diaconu, C. and Etienne, F. and Thulasidas, M. and Nicod, D. and Payre, P. and Rousseau, D. and Talby, M. and Abt, I. and Assmann, R. and Bauer, C. and Blum, W. and Brown, D. and Dietl, H. and Dydak, F. and Ganis, G. and Gotzhein, C. and Jakobs, K. and Kroha, H. and Lütjens, G. and Lutz, G. and Männer, W. and Moser, H.-G. and Richter, R. and Rosado-Schlosser, A. and Schael, S. and Settles, R. and Seywerd, H. and St. Denis, R. and Wolf, G. and Alemany, R. and Boucrot, J. and Callot, O. and Cordier, A. and Courault, F. and Davier, M. and Duflot, L. and Grivaz, J.-F. and Heusse, Ph. and Jacquet, M. and Kim, D.W. and Le Diberder, F. and Lefrançois, J. and Lutz, A.-M. and Musolino, G. and Nikolic, I. and Park, H.J. and Park, I.C. and Schune, M.-H. and Simion, S. and Veillet, J.-J. and Videau, I. and Abbaneo, D. and Azzurri, P. and Bagliesi, G. and Batignani, G. and Bettarini, S. and Bozzi, C. and Calderini, G. and Carpinelli, M. and Ciocci, M.A. and Ciulli, V. and Dell'Orso, R. and Fantechi, R. and Ferrante, I. and Fidecaro, F. and Foà, L. and Forti, F. and Giassi, A. and Giorgi, M.A. and Gregorio, A. and Ligabue, F. and Lusiani, A. and Marrocchesi, P.S. and Messineo, A. and Rizzo, G. and Sanguinetti, G. and Sciabà, A. and Spagnolo, P. and Steinberger, J. and Tenchini, R. and Tonelli, G. and Triggiani, G. and Vannini, C. and Verdini, P.G. and Walsh, J. and Betteridge, A.P. and Blair, G.A. and Bryant, L.M. and Cerutti, F. and Gao, Y. and Green, M.G. and Johnson, D.L. and Medcalf, T. and Mir, Ll.M. and Perrodo, P. and Strong, J.A. and Bertin, V. and Botterill, D.R. and Clifft, R.W. and Edgecock, T.R. and Haywood, S. and Edwards, M. and Maley, P. and Norton, P.R. and Thompson, J.C. and Bloch-Devaux, B. and Colas, P. and Emery, S. and Kozanecki, W. and Lançon, E. and Lemaire, M.C. and Locci, E. and Marx, B. and Perez, P. and Rander, J. and Renardy, J.-F. and Roussarie, A. and Schuller, J.-P. and Schwindling, J. and Trabelsi, A. and Vallage, B. and Johnson, R.P. and Kim, H.Y. and Litke, A.M. and McNeil, M.A. and Taylor, G. and Beddall, A. and Booth, C.N. and Boswell, R. and Cartwright, S. and Combley, F. and Dawson, I. and Koksal, A. and Letho, M. and Newton, W.M. and Rankin, C. and Thompson, L.F. and Böhrer, A. and Brandt, S. and Cowan, G. and Feigl, E. and Grupen, C. and Lutters, G. and Minguet-Rodriguez, J. and Rivera, F. and Saraiva, P. and Smolik, L. and Stephan, F. and Apollonio, M. and Bosisio, L. and Della Marina, R. and Giannini, G. and Gobbo, B. and Ragusa, F. and Rothberg, J. and Wasserbaech, S. and Armstrong, S.R. and Bellantoni, L. and Elmer, P. and Feng, Z. and Ferguson, D.P.S. and Gao, Y.S. and González, S. and Grahl, J. and Harton, J.L. and Hayes, O.J. and Hu, H. and McNamara III, P.A. and Nachtman, J.M. and Orejudos, W. and Pan, Y.B. and Saadi, Y. and Schmitt, M. and Scott, I.J. and Sharma, V. and Turk, J.D. and Walsh, A.M. and Wu, S.L. and Wu, X. and Yamartino, J.M. and Zheng, M. and Zobernig, G.", journal = "ZEITSCHRIFT FUR PHYSIK. SECTION C, PARTICLES AND FIELDS", year = "1996", volume = "70", number = "4", pages = "549-559", publisher = "Springer-Verlag", issn = "0170-9739", doi = "10.1007/s002880050132", abstract = "The mean lifetime of the τ lepton is measured in a sample of 25700 τ pairs collected in 1992 with the ALEPH detector at LEP. A new analysis of the 1-1 topology events is introduced. In this analysis, the dependence of the impact parameter sum distribution on the daughter track momenta is taken into account, yielding improved precision compared to other impact parameter sum methods. Three other analyses of the one- and three-prong τ decays are updated with increased statistics. The measured lifetime is 293.5±3.1±1.7 fs. Including previous (1989-1991) ALEPH measurements, the combined τ lifetime is 293.7±2.7±1.6 fs. © Springer-Verlag 1996." }