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Measurement of the Branching Fraction of Υ(4S)→B0B¯0

Aubert, B. et al. (2005) Measurement of the Branching Fraction of Υ(4S)→B0B¯0. Physical Review Letters, 95 (4). 042001. ISSN 0031-9007

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We report the first measurement of the branching fraction f00 for Υ(4S)→B0B̅ 0. The data sample consists of 81.7  fb-1 collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. Using partial reconstruction of the decay B̅ 0→D*+ℓ-ν̅ ℓ in which only the charged lepton and the soft pion from the decay D*+→D0π+ are reconstructed, we obtain f00=0.487±0.010(stat)±0.008(syst). Our result does not depend on the branching fractions of B̅ 0→D*+ℓ-ν̅ ℓ and D*+→D0π+ decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 31 Mar 2011 09:10
Last Modified: 28 Aug 2021 11:05


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