Measurement of the Relative Branching Fraction of ϒ(4S) to Charged and Neutral B-Meson Pairs

J. P. Alexander et al. (CLEO Collaboration)
Phys. Rev. Lett. 86, 2737 – Published 26 March 2001
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Abstract

We analyze 9.7×106 BB¯ 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 B0J/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)B0B¯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.

  • Received 1 June 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.2737

©2001 American Physical Society

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Vol. 86, Iss. 13 — 26 March 2001

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