Measurement Of The B(S)O Lifetime

D. Buskulic, I. De Bonis,D. Decamp,P. Ghez, C. Goy, J.-P. Lees,M.-N. Minard,P. Odier, B. Pietrzyk,F. Ariztizabal,P. Comas,J.M. Crespo,I. Efthymiopoulos,E. Fernandez,M. Fernandez-Bosman,V. Gaitan, Ll. Garrido,M. Martinez,T. Mattison,S. Orteu,A. Pacheco,C. Padilla,A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli,S. Natali,S. Nuzzo,A. Ranieri,G. Raso, F. Romano,F. Ruggieri,G. Selvaggi,L. Silvestris,P. Tempesta,G. Zito, Y. Chai,H. Hu,D. Huang,X. Huang,J. Lin, T. Wang,Y. Xie,D. Xu, R. Xu,J. Zhang, L. Zhang,W. Zhao,G. Bonvicini, J. Boudreau,D. Casper,H. Drevermann,R.W. Forty,G. Ganis, C. Gay,M. Girone,R. Hagelberg,J. Harvey,J. Hilgart,R. Jacobsen, B. Jost,J. Knobloch,I. Lehraus,M. Maggi,C. Markou,P. Mato,H. Meinhard, A. Minten, R. Miquel,H.-G. Moser,P. Palazzi,J.R. Pater,J.A. Perlas,P. Perrodo,J.-F. Pusztaszeri,F. Ranjard,L. Rolandi, J. Rothberg,T. Ruan,M. Saich,D. Schlatter,M. Schmelling,F. Sefkow,W. Tejessy,I.R. Tomalin,R. Veenhof,H. Wachsmuth, S. Wasserbaech,W. Wiedenmann,T. Wildish,W. Witzeling,J. Wotschack, Z. Ajaltouni,M. Bardadin-Otwinowska,A. Barres,C. Boyer,A. Falvard, P. Gay, C. Guicheney, P. Henrard,J. Jousset,B. Michel,J.-C. Montret, D. Pallin, P. Perret, F. Podlyski,J. Proriol,F. Saadi,T. Fearnley,J.B. Hansen,J.D. Hansen,J.R. Hansen,P.H. Hansen,S.D. Johnson,R. Møllerud,B.S. Nilsson, A. Kyriakis,E. Simopoulou,I. Siotis,A. Vayaki,K. Zachariadou,J. Badier, A. Blondel,G. Bonneaud,J.C. Brient,P. Bourdon,G. Fouque,L. Passalacqua,A. Rougé,M. Rumpf, R. Tanaka,M. Verderi,H. Videau,D.J. Candlin,M.I. Parsons,E. Veitch,E. Focardi,L. Moneta,G. Parrini,M. Corden,M. Delfino,C. Georgiopoulos,D.E. Jaffe,D. Levinthal,A. Antonelli, G. Bencivenni,G. Bologna,F. Bossi, P. Campana,G. Capon,F. Cerutti,V. Chiarella,G. Felici,P. Laurelli,G. Mannocchi,F. Murtas,G.P. Murtas,M. Pepe-Altarelli,S. Salomone,P. Colrain,I. ten Have,I.G. Knowles,J.G. Lynch,W. Maitland,W.T. Morton,C. Raine,P. Reeves,J.M. Scarr,K. Smith,M.G. Smith,A.S. Thompson,S. Thorn,R.M. Turnbull,B. Brandl,O. Braun,C. Geweniger,G. Graefe, P. Hanke,V. Hepp,C. Karger,E.E. Kluge,Y. Maumary,A. Putzer,B. Rensch,A. Stahl,K. Tittel,M. Wunsch,R. Beuselinck,D.M. Binnie,W. Cameron,M. Cattaneo,D.J. Colling,P.J. Dornan,J.F. Hassard,N.M. Lieske,A. Moutoussi,J. Nash,S. Patton,D.G. Payne,M.J. Phillips,G. San Martin,J.k. Sedgbeer,A.G. Wright,P. Girtler, D. Kuhn, G. Rudolph,R. Vogl,C.K. Bowdery,T.J. Brodbeck,A.J. Finch,F. Foster, G. Hughes,D. Jackson,N.R. Keemer,M. Nuttall,A. Patel,T. Sloan,S.W. Snow,E.P. Whelan,A. Galla,A.M. Greene, K. Kleinknecht,J. Raab,B. Renk,H.-G. Sander,H. Schmidt,S.M. Walther,R. Wanke,B. Wolf,A.M. Bencheikh, C. Benchouk,A. Bonissent,D. Calvet,J. Carr,P. Coyle,C. Diaconu,J. Drinkard,F. Etienne,D. Nicod,P. Payre,L. Ross, D. Rousseau,P. Schwemling, M. Talby,S. Adlung,R. Assmann,C. Bauer, W. Blum,D. Brown,P. Cattaneo,B. Dehning,H. Dietl,F. Dydak,M. Frank,A.W. Halley, K. Jakobs,J. Lauber,G. Lütjens, G. Lutz,W. Männer,R. Richter, J. Schröder,A.S. Schwarz,R. Settles,H. Seywerd,U. Stierlin,U. Stiegler,R.St. Denis,G. Wolf,R. Alemany,J. Boucrot,O. Callot,A. Cordier, M. Davier, L. Duflot,J.-F. Grivaz,Ph. Heusse, P. Janot, D.W. Kimfn, F. Le Diberder,J. Lefrançois,A.-M. Lutz,G. Musolino,M.-H. Schune,J.-J. Veillet,I. Videau, D. Abbaneo, G. Bagliesi,G. Batignani,U. Bottigli,C. Bozzi, G. Calderini,M. Carpinelli,M.A. Ciocci,V. Ciulli,R. Dell'Orso,I. Ferrante, F. Fidecaro,L. Foà,F. Forti, A. Giassi,M.A. Giorgi,A. Gregorio, F. Ligabue,A. Lusiani,E.B. Mannelli,P.S. Marrocchesi, A. Messineo,F. Palla,G. Rizzo,G. Sanguinetti,P. Spagnolo,J. Steinberger, R. Tenchini,G. Tonelli,G. Triggiani,A. Valassi,C. Vannini,A. Venturi, P.G. Verdini, J. Walsh,A.P. Betteridge, Y. Gao,M.G. Green, D.L. Johnson,P.V. March,T. Medcalf,Ll.M. Mir,I.S. Quazi,J.A. Strong,V. Bertin,D.R. Botterill,R.W. Clifft,T.R. Edgecock,S. Haywood,M. Edwards,P.R. Norton,J.C. Thompson,B. Bloch-Devaux,P. Colas,H. Duarte,S. Emery,W. Kozanecki,E. Lançon,M.C. Lemaire, E. Locci,B. Marx,P. Perez, J. Rander,J.-F. Renardy, A. Rosowsky,A. Roussarie,J.-P. Schuller,J. Schwindling,D. Si Mohand,B. Vallage,R.P. Johnson,A.M. Litke,G. Taylor,J. Wear,W. Babbage,C.N. Booth,C. Buttar,S. Cartwright,F. Combley, I. Dawson,L.F. Thompson, E. Barberio,A. Böhrer,S. Brandt,G. Cowan,C. Grupen,G. Lutters,F. Rivera,U. Schäfer,L. Smolik,L. Bosisio,R. Della Marina,G. Giannini,B. Gobbo,L. Pitis,F. Ragusa, L. Bellantoni, W. Chen,J.S. Conway,Z. Feng,D.P.S. Ferguson, Y.S. Gao,J. Grahl,J.L. Harton,O.J. Hayes,J.M. Nachtman,Y.B. Pan,Y. Saadi, M. Schmitt,I. Scott, V. Sharma,Z.H. Shi,J.D. Turk,A.M. Walsh,F.V. Weber,Sau Lan Wu,X. Wu,M. Zheng, G. Zobernig

PHYSICS LETTERS B（1994）

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摘要

The lifetime of the B(s)0 has been measured in a data sample of 889 000 hadronic events recorded with the ALEPH detector at LEP. After background subtraction 30.8 +/- 6.9 events are attributed to the semileptonic decay of the B(S)0 to a D(S)- and an opposite-sign lepton. A maximum-likelihood fit to the distribution of the proper times of these events yields a B(s)0 lifetime of tau(B)s = 1.92 (-0.35)+0.45 +/- 0.04 ps.

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