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Study of B±J/ψπ± and B±J/ψK± decays: Measurement of the ratio of branching fractions and search for direct CP-violating charge asymmetries

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. D 65, 091101(R) – Published 15 April 2002
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Abstract

We have studied the B±J/ψπ± and B±J/ψK± decays using a 20.7 fb1 data set collected with the BABAR detector. We observe a signal of 51±10 B±J/ψπ± events and determine the ratio B(B±J/ψπ±)/B(B±J/ψK±) to be [3.91±0.78(stat)±0.19(syst)]%. The CP-violating charge asymmetries for the B±J/ψπ± and B±J/ψK± decays are determined to be Aπ=0.01±0.22(stat)±0.01(syst) and AK=0.003±0.030(stat)±0.004(syst).

  • Received 3 August 2001

DOI:https://doi.org/10.1103/PhysRevD.65.091101

©2002 American Physical Society

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Vol. 65, Iss. 9 — 1 May 2002

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