Measurement Of The Relative Branching Fraction Of Gamma R(4s) To Charged And Neutral B-Meson Pairs

J. P. Alexander,R. Baker,C. Bebek,B. Berger,K. Berkelman,F. Blanc, V. Boisvert,D. Cassel,M. Dickson, P. Drell,K. Ecklund,R. Ehrlich,A. Foland,P. Gaidarev, L. Gibbons,B. Gittelman, S. Gray,D. Hartill, B. Heltsley,P. Hopman,C. Jones,D. Kreinick, M. Lohner,A. Magerkurth,T. Meyer,N. Mistry, E. Nordberg,J. Patterson, D. Peterson, D. Riley,J. Thayer,P. Thies, B. Valant-Spaight,A. Warburton, P. Avery, C. Prescott,A. Rubiera, J. Yelton, J. Zheng, G. Brandenburg, A. Ershov, Y. Gao,D. Kim, R. Wilson, T. Browder, Y. Li,J. Rodriguez, H. Yamamoto,T. Bergfeld,B. Eisenstein, J. Ernst,G. Gladding, G. Gollin,R. Hans,E. Johnson, I. Karliner,M. Marsh,M. Palmer, C. Plager,C. Sedlack,M. Selen,J. Thaler,J. Williams, K. Edwards,R. Janicek,P. Patel, A. Sadoff,R. Ammar,A. Bean, D. Besson,R. Davis,N. Kwak,X. Zhao,S. Anderson,V. Frolov,Y. Kubota,S. Lee,R. Mahapatra,J. O'Neill,R. Poling,T. Riehle,A. Smith,J. Urheim,S. Ahmed,M. Alam,S. Athar, L. Jian,L. Ling,A. Mahmood,M. Saleem,S. Timm,F. Wappler, A. Anastassov,J. Duboscq,E. Eckhart,K. Gan, C. Gwon,T. Hart,K. Honscheid,D. Hufnagel, H. Kagan, R. Kass,T. Pedlar,H. Schwarthoff,J. Thayer, E. von Toerne,M. Zoeller,S. Richichi, H. Severini, P. Skubic, A. Undrus, S. Chen,J. Fast,J. Hinson,J. Lee,N. Menon,D. Miller, E. Shibata, I. Shipsey, V. Pavlunin, D. Cronin-Hennessy,Y. Kwon,A. Lyon,E. Thorndike,C. Jessop,H. Marsiske,M. Perl, V. Savinov, D. Ugolini,X. Zhou,T. Coan,V. Fadeyev, Y. Maravin,I. Narsky, R. Stroynowski,J. Ye, T. Wlodek,M. Artuso,R. Ayad, C. Boulahouache,K. Bukin,E. Dambasuren,S. Karamov, G. Majumder, G. Moneti,R. Mountain,S. Schuh, T. Skwarnicki,S. Stone,G. Viehhauser, J. Wang, A. Wolf, J. Wu,S. Kopp, S. Csorna,I. Danko,K. McLean,Sz. Márka, Z. Xu,R. Godang, K. Kinoshita,I. Lai,S. Schrenk,G. Bonvicini,D. Cinabro,S. McGee,L. Perera,G. Zhou, E. Lipeles,M. Schmidtler,A. Shapiro, W. Sun,A. Weinstein, F. Würthwein,D. Jaffe, G. Masek, H. Paar,E. Potter, S. Prell, V. Sharma,D. Asner,A. Eppich,T. Hill, R. Morrison,R. Briere,B. Behrens,W. Ford,A. Gritsan,J. Roy, J. Smith

PHYSICAL REVIEW LETTERS(2001)

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摘要
We analyze 9.7 X 10(6) B (B) over bar pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Y(4S) resonance. We measure the rates for B-0 --> J/psiK((*)0) and B+ --> J/psiK((*)+) decays and use the world-average B-meson lifetime ratio to extract the relative widths f(+-)/f(00) = Gamma (Y(4S)-->B+B-)/Gamma (Y(4S)-->B-0(B) over bar (0)) = 1.04 +/- 0.07(stat) +/- 0.04(syst). With the assumption that f(+-) + f(00) = 1, we obtain f(00) = 0.49 +/- 0.02(stat) +/- 0.01(syst) and f(+-) = 0.51 +/- 0.02(stat) +/- 0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Y(4S) resonance.
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