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Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons
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LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons. European Physical Journal C, Volume 72 (Number 8 ). Article number 2118. doi:10.1140/epjc/s10052-012-2118-7
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Official URL: http://dx.doi.org/10.1140/epjc/s10052-012-2118-7
Abstract
The relative rates of B-meson decays into J/ψ
and ψ(2S) mesons are measured for the three decay modes
in pp collisions recorded with the LHCb detector. The ratios
of branching fractions (B) are measured to be
B(B
+→ψ(2S)K
+
)
B(B+→J/ψK+)
= 0.594±0.006(stat)±0.016(syst)±0.015(Rψ),
B(B0→ψ(2S)K
∗0)
B(B0→J/ψK∗0)
= 0.476±0.014(stat)±0.010(syst)±0.012(Rψ),
B(B0
s
→ψ(2S)φ)
B(B0
s
→J/ψφ)
= 0.489±0.026(stat)±0.021(syst)±0.012(Rψ),
where the third uncertainty is from the ratio of the ψ(2S)
and J/ψ branching fractions to μ
+
μ
−.
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