Measurement Of The Lifetime Of The B-C(+/-) Meson In The Semileptonic Decay Channel
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,M. Aoki,Y. Arnoud,M. Arthaud, A. Askew,B. Asman,A. Assis Jesus,O. Atramentov,C. Avila,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. 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,I. Bertram,M. Besan, 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,E. E. Boos,G. Brooijmans,T. Bose,A. Brandt,R. Brock,G. Brooijmans,A. Bross,D. Brown,N. J. Buchanan, D. Buchholz,M. Buehler,V. Buescher,V. Bunichev,S. Burdin,S. Burke,T. H. Burnett, C. P. Buszello, J. M. Butler, S. Calvet,J. Cammin,W. Carvalho,B. C. K. Casey,H. Castilla-Valdez,S. Chakrabarti,D. Chakraborty,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,J. Clutter,M. Cooke,W. E. Cooper,M. Corcoran, F. Couderc,M.-C. Cousinou,S. Cr,D. Cutts,M. Cwiok,H. da Motta,A. Das,G. Davies, S. J. de Jong,C. De Oliveira Martins, J. D. Degenhardt,M. Demarteau,R. Demina,D. Denisov, S. P. Denisov,S. Desai,H. T. Diehl, M. Diesburg,A. Dominguez,H. Dong, L. V. Dudko,L. Duot,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. Filthaut,W. Fisher,H. E. Fisk, M. Fortner,H. Fox,S. Fuess,T. Gadfort,C. F. Galea,E. Gallas,C. Garcia,A. Garcia-Bellido, V. Gavrilov, P. Gay,W. Geist,D. Gel, V. Gavrilov,P. Gay,W. Geist,D. Gelé,C. Gerber, Y. Gershtein, D. Gillberg,G. Ginther,N. Gollub,B. 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PHYSICAL REVIEW LETTERS（2009）
引用 85|浏览246
摘要
Using approximately 1.3 fb(-1) of data collected by the D0 detector between 2002 and 2006, we measure the lifetime of the B-c(+/-) meson in the B-c(+/-)-> J/psi mu(+/-)+X final state. A simultaneous unbinned likelihood fit to the J/psi+mu invariant mass and lifetime distributions yields a signal of 881 +/- 80(stat) candidates and a lifetime measurement of tau(B-c(+/-))=0.448(-0.036)(+0.038)(stat)+/- 0.032(syst) ps.
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