Measurement of the and B− meson lifetimes

6533b832fe1ef96bd129a467

RESEARCH PRODUCT

Measurement of the and B− meson lifetimes

D. Buskulic D. Decamp C. Goy J.-p. Lees M.-n. Minard B. Mours B. Pietrzyk R. Alemany F. Ariztizabal P. Comas J.m. Crespo M. Delfino E. Fernandez M. Fernandez-bosman V. Gaitan Ll. Garrido T. Mattison A. Pacheco C. Padilla A. Pascual D. Creanza M. De Palma A. Farilla G. Iaselli G. Maggi M. Maggi S. Natali S. Nuzzo M. Quattromini 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 L.a.t. Bauerdick E. Blucher G. Bonvicini J. Boudreau D. Casper H. Drevermann R.w. Forty G. Ganis C. Gay R. Hagelberg J. Harvey S. Haywood J. Hilgart R. Jacobsen B. Jost J. Knobloch I. Lehraus T. Lohse A. Lusiani M. Martinez P. Mato H. Meinhard A. Minten A. Miotto R. Miquel H.-g. Moser P. Palazzi J.a. Perlas J.-f. Pusztaszeri F. Ranjard G. Redlinger L. Rolandi J. Rothberg T. Ruan M. Saich D. Schlatter M. Schmelling F. Sefkow W. Tejessy H. Wachsmuth W. Wiedenmann T. Wildish W. Witzeling J. Wotschack Z. Ajaltouni F. Badaud M. Bardadin-otwinowska R. El Fellous A. Falvard P. Gay C. Guicheney P. Henrard J. Jousset B. Michel J.-c. Montret D. Pallin P. Perret F. Podlyski J. Proriol F. Prulhière F. Saadi T. Fearnley J.d. Hansen J.r. Hansen P.h. Hansen R. Møllerud B.s. Nilsson I. Efthymiopoulos A. Kyriakis E. Simopoulou A. Vayaki K. Zachariadou J. Badier A. Blondel G. Bonneaud J.c. Brient G. Fouque S. Orteu A. Rougé M. Rumpf R. Tanaka M. Verderi H. Videau D.j. Candlin M.i. Parsons E. Veitch L. Moneta G. Parrini M. Corden C. Georgiopoulos M. Ikeda J. Lannutti D. Levinthal M. Mermikides L. Sawyer S. Wasserbaech A. Antonelli R. Baldini G. Bencivenni G. Bologna F. Bossi P. Campana G. Capon F. Cerutti V. Chiarella B. D'ettorre-piazzoli G. Felici P. Laurelli G. Mannocchi F. Murtas G.p. Murtas L. Passalacqua M. Pepe-altarelli P. Picchi P. Colrain I. Ten Have J.g. Lynch W. Maitland W.t. Morton C. Raine P. Reeves J.m. Scarr K. Smith M.g. Smith A.s. Thompson R.m. Turnbull B. Brandl O. Braun C. Geweniger P. Hanke V. Hepp E.e. Kluge Y. Maumary A. Putzer B. Rensch A. Stahl K. Tittel M. Wunsch A.t. Belk R. Beuselinck D.m. Binnie W. Cameron M. Cattaneo D.j. Colling P.j. Dornan S. Dugeay A.m. Greene J.f. Hassard N.m. Lieske J. Nash D.g. Payne M.j. Phillips J.k. Sedgbeer I.r. Tomalin A.g. Wright P. Girtler E. Kneringer D. Kuhn G. Rudolph 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 K. Kleinknecht J. Raab B. Renk H.-g. Sander H. Schmidt F. Steeg S.m. Walther R. Wanke B. Wolf J.-j. Aubert A.m. Bencheikh C. Benchouk A. Bonissent J. Carr P. Coyle J. Drinkard F. Etienne D. Nicod S. Papalexiou P. Payre L. Roos 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 J. Lauber G. Lütjens G. Lutz W. Männer R. Richter H. Rotscheidt J. Schröder A.s. Schwarz R. Settles H. Seywerd U. Stierlin U. Stiegler R.st. Denis G. Wolf J. Boucrot O. Callot A. Cordier M. Davier L. Duflot J.-f. Grivaz Ph. Heusse D.e. Jaffe P. Janot D.w. Kim F. Le Diberder J. Lefrançois A.-m. Lutz M.-h. Schune J.-j. Veillet I. Videau Z. Zhang D. Abbaneo G. Bagliesi G. Batignani L. Bosisio U. Bottigli C. Bozzi G. Calderini M. Carpinelli M.a. Ciocci R. Dell'orso I. Ferrante F. Fidecaro L. Foà E. Focardi F. Forti A. Giassi M.a. Giorgi A. Gregorio F. Ligabue E.b. Mannelli P.s. Marrocchesi A. Messineo F. Palla G. Rizzo G. Sanguinetti P. Spagnolo J. Steinberger R. Tenchini G. Tonelli G. Triggiani C. Vannini A. Venturi P.g. Verdini J. Walsh A.p. Betteridge J.m. Carter M.g. Green P.v. March Ll.m. Mir T. Medcalf I.s. Quazi J.a. Strong L.r. West D.r. Botterill R.w. Clifft T.r. Edgecock M. Edwards S.m. Fisher T.j. Jones P.r. Norton D.p. Salmon J.c. Thompson B. Bloch-devaux P. Colas H. Duarte W. Kozanecki E. Lançon M.c. Lemaire E. Locci P. Perez F. Perrier 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 J.g. Ashman W. Babbage C.n. Booth C. Buttar R.e. Carney S. Cartwright F. Combley F. Hatfield L.f. Thompson E. Barberio A. Böhrer S. Brandt G. Cowan C. Grupen G. Lutters F. Rivera U. Schäfer L. Smolik R. Della Marina G. Giannini B. Gobbo F. Ragusa L. Bellantoni W. Chen D. Cinabro J.s. Conway D.f. Cowen Z. Feng D.p.s. Ferguson Y.s. Gao J. Grahl J.l. Harton R.c. Jared B.w. Leclaire C. Lishka Y.b. Pan J.r. Pater Y. Saadi V. Sharma M. Schmitt Z.h. Shi A.m. Walsh F.v. Weber Null Sau Lan Wu X. Wu M. Zheng G. Zobernig

subject

Semileptonic decay Physics Nuclear and High Energy Physics Particle physics Meson 010308 nuclear & particles physics Electron–positron annihilation Nuclear Theory High Energy Physics::Phenomenology 01 natural sciences Nuclear physics Momentum 0103 physical sciences Decay length Proper time High Energy Physics::Experiment B meson Nuclear Experiment 010306 general physics Lepton

description

Abstract The lifetimes of the B 0 and B − mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B 0 and B − mesons were partially reconstructed by identifying events containing a lepton with an associated D ∗+ or D 0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D -lepton system. A fit to the proper time of 77 D ∗+ l − and 77 D 0 l − candidates, combined with a constraint on the lifetime ratio ( τ − τ 0 ) arising from the relative rates of observed D ∗+ l − and D 0 l − events, yielded the following lifetimes: τ 0 =1.52 −0.18 +0.20 ( stat. ) −0.13 +0.07 ( syst. ) ps , τ − = 1.47 −0.19 +0.22 ( stat. ) −0.14 +0.15 ( syst. ) ps , τ − τ 0 = 0.96 −0.15 +0.19 ( stat. ) −0.12 +0.18 ( syst. ) .

year	journal	country	edition	language
1993-06-01

10.1016/0370-2693(93)90211-y http://hdl.handle.net/11588/509899