Phys. Rev. Lett. 86, 2737 - 2741 (2001)
Measurement of the Relative Branching Fraction of ϒ(4S) to Charged and Neutral B-Meson Pairs
J. P. Alexander et al. (CLEO Collaboration)
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J. P. Alexander1, R. Baker1, C. Bebek1, B. E. Berger1, K. Berkelman1, F. Blanc1, V. Boisvert1, D. G. Cassel1, M. Dickson1, P. S. Drell1, K. M. Ecklund1, R. Ehrlich1, A. D. Foland1, P. Gaidarev1, L. Gibbons1, B. Gittelman1, S. W. Gray1, D. L. Hartill1, B. K. Heltsley1, P. I. Hopman1, C. D. Jones1, D. L. Kreinick1, M. Lohner1, A. Magerkurth1, T. O. Meyer1, N. B. Mistry1, E. Nordberg1, J. R. Patterson1, D. Peterson1, D. Riley1, J. G. Thayer1, P. G. Thies1, B. Valant-Spaight1, A. Warburton1, P. Avery2, C. Prescott2, A. I. Rubiera2, J. Yelton2, J. Zheng2, G. Brandenburg3, A. Ershov3, Y. S. Gao3, D. Y.-J. Kim3, R. Wilson3, T. E. Browder4, Y. Li4, J. L. Rodriguez4, H. Yamamoto4, T. Bergfeld5, B. I. Eisenstein5, J. Ernst5, G. E. Gladding5, G. D. Gollin5, R. M. Hans5, E. Johnson5, I. Karliner5, M. A. Marsh5, M. Palmer5, C. Plager5, C. Sedlack5, M. Selen5, J. J. Thaler5, J. Williams5, K. W. Edwards6,6b, R. Janicek7,7b, P. M. Patel7,7b, A. J. Sadoff8, R. Ammar9, A. Bean9, D. Besson9, R. Davis9, N. Kwak9, X. Zhao9, S. Anderson10, V. V. Frolov10, Y. Kubota10, S. J. Lee10, R. Mahapatra10, J. J. O'Neill10, R. Poling10, T. Riehle10, A. Smith10, J. Urheim10, S. Ahmed11, M. S. Alam11, S. B. Athar11, L. Jian11, L. Ling11, A. H. Mahmood11 *, M. Saleem11, S. Timm11, F. Wappler11, A. Anastassov12, J. E. Duboscq12, E. Eckhart12, K. K. Gan12, C. Gwon12, T. Hart12, K. Honscheid12, D. Hufnagel12, H. Kagan12, R. Kass12, T. K. Pedlar12, H. Schwarthoff12, J. B. Thayer12, E. von Toerne12, M. M. Zoeller12, S. J. Richichi13, H. Severini13, P. Skubic13, A. Undrus13, S. Chen14, J. Fast14, J. W. Hinson14, J. Lee14, N. Menon14, D. H. Miller14, E. I. Shibata14, I. P. J. Shipsey14, V. Pavlunin14, D. Cronin-Hennessy15, Y. Kwon15 †, A. L. Lyon15, E. H. Thorndike15, C. P. Jessop16, H. Marsiske16, M. L. Perl16, V. Savinov16, D. Ugolini16, X. Zhou16, T. E. Coan17, V. Fadeyev17, Y. Maravin17, I. Narsky17, R. Stroynowski17, J. Ye17, T. Wlodek17, M. Artuso18, R. Ayad18, C. Boulahouache18, K. Bukin18, E. Dambasuren18, S. Karamov18, G. Majumder18, G. C. Moneti18, R. Mountain18, S. Schuh18, T. Skwarnicki18, S. Stone18, G. Viehhauser18, J. C. Wang18, A. Wolf18, J. Wu18, S. Kopp19, S. E. Csorna20, I. Danko20, K. W. McLean20, Sz. Márka20, Z. Xu20, R. Godang21, K. Kinoshita21 ‡, I. C. Lai21, S. Schrenk21, G. Bonvicini22, D. Cinabro22, S. McGee22, L. P. Perera22, G. J. Zhou22, E. Lipeles23, M. Schmidtler23, A. Shapiro23, W. M. Sun23, A. J. Weinstein23, F. Würthwein23 §, D. E. Jaffe24, G. Masek24, H. P. Paar24, E. M. Potter24, S. Prell24, V. Sharma24, D. M. Asner25, A. Eppich25, T. S. Hill25, R. J. Morrison25, R. A. Briere26, B. H. Behrens27, W. T. Ford27, A. Gritsan27, J. Roy27, and J. G. Smith27 (CLEO Collaboration)
1Cornell University, Ithaca, New York 14853
2University of Florida, Gainesville, Florida 32611
3Harvard University, Cambridge, Massachusetts 02138
4University of Hawaii at Manoa, Honolulu, Hawaii 96822
5University of Illinois, Urbana-Champaign, Illinois 61801
6aCarleton University, Ottawa, Ontario, Canada K1S 5B6
6band the Institute of Particle Physics, Canada
7aMcGill University, Montréal, Québec, Canada H3A 2T8
7band the Institute of Particle Physics, Canada
8Ithaca College, Ithaca, New York 14850
9University of Kansas, Lawrence, Kansas 66045
10University of Minnesota, Minneapolis, Minnesota 55455
11State University of New York at Albany, Albany, New York 12222
12Ohio State University, Columbus, Ohio 43210
13University of Oklahoma, Norman, Oklahoma 73019
14Purdue University, West Lafayette, Indiana 47907
15University of Rochester, Rochester, New York 14627
16Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
17Southern Methodist University, Dallas, Texas 75275
18Syracuse University, Syracuse, New York 13244
19University of Texas, Austin, Texas 78712
20Vanderbilt University, Nashville, Tennessee 37235
21Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
22Wayne State University, Detroit, Michigan 48202
23California Institute of Technology, Pasadena, California 91125
24University of California, San Diego, La Jolla, California 92093
25University of California, Santa Barbara, California 93106
26Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
27University of Colorado, Boulder, Colorado 80309-0390
Received 1 June 2000
We analyze 9.7×106 BB̅ pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the ϒ(4S) resonance. We measure the rates for B0→J/ψK(*)0 and B+→J/ψK(*)+ decays and use the world-average B-meson lifetime ratio to extract the relative widths f+- / f00 = Γ(ϒ(4S)→B+B-) / Γ(ϒ(4S)→B0B̅ 0) = 1.04±0.07(stat)±0.04(syst). With the assumption that f+-+f00 = 1, we obtain f00 = 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 ϒ(4S) resonance.
©2001 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.86.2737
DOI: 10.1103/PhysRevLett.86.2737
PACS: 14.40.Nd, 13.25.Hw
* Permanent address: University of Texas-Pan American, Edinburg, Texas 78539.
† Permanent address: Yonsei University, Seoul 120-749, Korea.
‡ Permanent address: University of Cincinnati, Cincinnati, Ohio 45221.
§ Permanent address: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
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