Measurement Of The Lambda(B) Lifetime In The Exclusive Decay Lambda(B)-> J/Psi Lambda

V. M. Abazov,B. Abbott,M. Abolins,B. S. Acharya,M. Adams,T. Adams,E. Aguilo,S. H. Ahn,M. Ahsan,G. D. Alexeev,G. Alkhazov,A. Alton,G. Alverson,G. A. Alves,M. Anastasoaie,L. S. Ancu,T. Andeen,S. Anderson,B. Andrieu,M. S. Anzelc,Y. Arnoud,M. Arov,M. Arthaud,A. Askew,B. Åsman,A. C. S. Assis Jesus,O. Atramentov,C. Autermann,C. Avila,C. Ay,F. Badaud,A. Baden,L. Bagby,B. Baldin,D. V. Bandurin,P. Banerjee,S. Banerjee,E. Barberis,A.-F. Barfuss,P. Bargassa,P. Baringer,J. Barreto,J. F. Bartlett,U. Bassler,D. Bauer, S. Beale,A. Bean,M. Begalli,M. Begel,C. Belanger-Champagne,L. Bellantoni,A. Bellavance,J. A. Benitez,S. B. Beri,G. Bernardi,R. Bernhard,L. Berntzon,I. Bertram,M. Besançon,R. Beuselinck,V. A. Bezzubov,P. C. Bhat,V. Bhatnagar,C. Biscarat,G. Blazey,F. Blekman,S. Blessing,D. Bloch,K. Bloom,A. Boehnlein,D. Boline,T. A. Bolton,G. Borissov,K. Bos,T. Bose,A. Brandt,R. Brock,G. Brooijmans,A. Bross,D. Brown,N. J. Buchanan,D. Buchholz,M. Buehler,V. Buescher,S. Burdin,S. Burke,T. H. Burnett,C. P. Buszello,J. M. Butler,P. Calfayan,S. Calvet,J. Cammin,S. Caron,W. Carvalho,B. C. K. Casey,N. M. Cason,H. Castilla-Valdez,S. Chakrabarti,D. Chakraborty,K. Chan,K. M. Chan,A. Chandra,F. Charles,E. Cheu,F. Chevallier,D. K. Cho,S. Choi,B. Choudhary,L. Christofek,T. Christoudias,S. Cihangir,D. Claes,B. Clément,C. Clément,Y. Coadou,M. Cooke,W. E. Cooper,M. Corcoran,F. Couderc,M.-C. Cousinou,S. Crépé-Renaudin,D. Cutts,M. Ćwiok,H. da Motta,A. Das,G. Davies,K. De,P. de Jong,S. J. de Jong,E. De La Cruz-Burelo,C. De Oliveira Martins,J. D. Degenhardt,F. Déliot,M. Demarteau,R. Demina,D. Denisov,S. P. Denisov,S. Desai,H. T. Diehl,M. Diesburg,A. Dominguez,H. Dong,L. V. Dudko, L. Duflot,S. R. Dugad,D. Duggan,A. Duperrin,J. Dyer,A. Dyshkant, M. Eads,D. Edmunds,J. Ellison,V. D. Elvira,Y. Enari,S. Eno,P. Ermolov,H. Evans,A. Evdokimov,V. N. Evdokimov,A. V. Ferapontov,T. Ferbel,F. Fiedler,F. Filthaut,W. Fisher,H. E. Fisk,M. Ford,M. Fortner,H. Fox,S. Fu,S. Fuess,T. Gadfort,C. F. Galea,E. Gallas,E. Galyaev,C. Garcia,A. Garcia-Bellido,V. Gavrilov,P. Gay,W. Geist,D. Gelé,C. E. Gerber,Y. Gershtein, D. Gillberg,G. Ginther,N. Gollub,B. Gómez,A. Goussiou,P. D. Grannis,H. Greenlee,Z. D. Greenwood,E. M. Gregores,G. Grenier,Ph. Gris,J.-F. Grivaz,A. Grohsjean,S. Grünendahl,M. W. Grünewald,F. Guo,J. Guo,G. Gutierrez,P. Gutierrez,A. Haas,N. J. Hadley,P. Haefner,S. Hagopian,J. Haley,I. Hall,R. E. Hall,L. Han,K. Hanagaki,P. Hansson,K. Harder,A. Harel,R. Harrington,J. M. Hauptman,R. Hauser,J. Hays, T. Hebbeker,D. Hedin,J. G. Hegeman,J. M. Heinmiller,A. P. Heinson,U. Heintz,C. Hensel,K. Herner,G. Hesketh,M. D. Hildreth,R. Hirosky,J. D. Hobbs,B. Hoeneisen,H. Hoeth,M. Hohlfeld,S. J. Hong,R. Hooper,S. Hossain,P. Houben,Y. Hu,Z. Hubacek,V. Hynek,I. Iashvili,R. Illingworth,A. S. Ito,S. Jabeen,M. Jaffré,S. Jain,K. Jakobs,C. Jarvis,R. Jesik,K. Johns,C. Johnson,M. Johnson, A. Jonckheere,P. Jonsson,A. Juste,D. Käfer,S. Kahn,E. Kajfasz,A. M. Kalinin,J. M. Kalk,J. R. Kalk,S. Kappler,D. Karmanov,J. Kasper,P. Kasper,I. Katsanos,D. Kau,R. Kaur,V. Kaushik,R. Kehoe,S. Kermiche,N. Khalatyan,A. Khanov,A. Kharchilava,Y. M. Kharzheev,D. Khatidze,H. Kim,T. J. Kim,M. H. Kirby,M. Kirsch,B. Klima,J. M. Kohli,J.-P. Konrath,M. Kopal,V. M. Korablev,B. Kothari,A. V. Kozelov,D. Krop,A. Kryemadhi,T. Kuhl,A. Kumar,S. Kunori,A. Kupco,T. Kurča,J. Kvita,D. Lam,S. Lammers,G. Landsberg,J. Lazoflores,P. Lebrun, W. M. Lee,A. Leflat,F. Lehner,J. Lellouch,V. Lesne,J. Leveque,P. Lewis,J. Li,L. Li,Q. Z. Li,S. M. Lietti,J. G. R. Lima,D. Lincoln,J. Linnemann,V. V. Lipaev,R. Lipton, Y. Liu,Z. Liu,L. Lobo,A. Lobodenko,M. Lokajicek,A. Lounis,P. Love,H. J. Lubatti,A. L. Lyon, A. K. A. Maciel,D. Mackin,R. J. Madaras,P. Mättig,C. Magass,A. Magerkurth,N. Makovec,P. K. Mal,H. B. Malbouisson,S. Malik,V. L. Malyshev,H. S. Mao,Y. Maravin,B. Martin,R. McCarthy,A. Melnitchouk,A. Mendes,L. Mendoza,P. G. Mercadante,M. Merkin,K. W. Merritt,A. Meyer,J. Meyer,M. Michaut,T. Millet,J. Mitrevski,J. Molina,R. K. Mommsen,N. K. Mondal,R. W. Moore,T. Moulik,G. S. Muanza,M. Mulders,M. Mulhearn, O. Mundal,L. Mundim,E. Nagy,M. Naimuddin,M. Narain,N. A. Naumann,H. A. Neal,J. P. Negret,P. Neustroev,H. Nilsen,C. Noeding,A. Nomerotski,S. F. Novaes,T. Nunnemann,V. O’Dell,D. C. O’Neil,G. Obrant,C. Ochando, D. Onoprienko,N. Oshima,J. Osta,R. Otec,G. J. Otero y Garzón,M. Owen,P. Padley,M. Pangilinan,N. Panikashvili,N. Parashar,S.-J. Park,S. K. Park,J. Parsons,R. Partridge,N. Parua,A. Patwa,G. Pawloski,P. M. Perea,K. Peters,Y. Peters,P. Pétroff,M. Petteni,R. Piegaia,J. Piper,M.-A. Pleier,P. L. M. Podesta-Lerma,V. M. Podstavkov,Y. Pogorelov,M.-E. Pol,A. Pompoš,B. G. Pope,A. V. Popov,C. Potter,W. L. Prado da Silva,H. B. Prosper,S. Protopopescu,J. Qian,A. Quadt,B. Quinn,A. Rakitine,M. S. Rangel,K. J. Rani,K. Ranjan,P. N. Ratoff,P. Renkel,S. Reucroft,P. Rich,M. Rijssenbeek,I. Ripp-Baudot,F. Rizatdinova,S. Robinson,R. F. Rodrigues,C. Royon,P. Rubinov,R. Ruchti,G. Safronov,G. Sajot,A. Sánchez-Hernández,M. P. Sanders,A. Santoro,G. Savage,L. Sawyer,T. Scanlon,D. Schaile,R. D. Schamberger,Y. Scheglov,H. Schellman,P. Schieferdecker,T. Schliephake,C. Schmitt,C. Schwanenberger,A. Schwartzman,R. Schwienhorst,J. Sekaric,S. Sengupta,H. Severini,E. Shabalina,M. Shamim,V. Shary,A. A. Shchukin,R. K. Shivpuri,D. Shpakov,V. Siccardi,V. Simak,V. Sirotenko,P. Skubic,P. Slattery,D. Smirnov,R. P. Smith,G. R. Snow,J. Snow,S. Snyder,S. Söldner-Rembold,L. Sonnenschein,A. Sopczak,M. Sosebee,K. Soustruznik,M. Souza,B. Spurlock,J. Stark,J. Steele,V. Stolin,A. Stone,D. A. Stoyanova,J. Strandberg,S. Strandberg,M. A. Strang,M. Strauss,R. Ströhmer,D. Strom,M. Strovink,L. Stutte,S. Sumowidagdo,P. Svoisky,A. Sznajder,M. Talby,P. Tamburello,A. Tanasijczuk,W. Taylor,P. Telford,J. Temple,B. Tiller,F. Tissandier,M. Titov,V. V. Tokmenin,M. Tomoto,T. Toole,I. Torchiani,T. Trefzger,D. Tsybychev,B. Tuchming,C. Tully,P. M. Tuts,R. Unalan,L. Uvarov,S. Uvarov,S. Uzunyan,B. Vachon,P. J. van den Berg,B. van Eijk,R. Van Kooten,W. M. van Leeuwen,N. Varelas,E. W. Varnes,A. Vartapetian,I. A. Vasilyev,M. Vaupel,P. Verdier,L. S. Vertogradov,M. Verzocchi,F. Villeneuve-Seguier,P. Vint,E. Von Toerne,M. Voutilainen,M. Vreeswijk,R. Wagner,H. D. Wahl, L. Wang,M. H. L. S Wang, J. Warchol,G. Watts,M. Wayne,G. Weber,M. Weber, H. Weerts,A. Wenger,N. Wermes,M. Wetstein,A. White,D. Wicke,G. W. Wilson,S. J. Wimpenny,M. Wobisch,D. R. Wood,T. R. Wyatt,Y. Xie,S. Yacoob,R. Yamada,M. Yan,T. Yasuda,Y. A. Yatsunenko,K. Yip,H. D. Yoo,S. W. Youn,C. Yu,J. Yu,A. Yurkewicz, A. Zatserklyaniy,C. Zeitnitz,D. Zhang,T. Zhao,B. Zhou,J. Zhu,M. Zielinski,D. Zieminska, A. Zieminski,L. Zivkovic,V. Zutshi,E. G. Zverev

PHYSICAL REVIEW LETTERS（2007）

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摘要

We have measured the Lambda(b) lifetime using the exclusive decay Lambda(b)-> J/psi Lambda, based on 1.2 fb(-1) of data collected with the D0 detector during 2002-2006. From 171 reconstructed Lambda(b) decays, where the J/psi and Lambda are identified via the decays J/psi ->mu(+)mu(-) and Lambda -> p pi, we measured the Lambda(b) lifetime to be tau(Lambda(b))=1.218(-0.115)(+0.130)(stat)+/- 0.042(syst) ps. We also measured the B-0 lifetime in the decay B-0 -> J/psi(mu(+)mu(-))K-S(0)(pi(+)pi(-)) to be tau(B-0)=1.501(-0.074)(+0.078)(stat)+/- 0.050(syst) ps, yielding a lifetime ratio of tau(Lambda(b))/tau(B-0)=0.811(-0.087)(+0.096)(stat)+/- 0.034(syst).

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