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Measurement of the branching fraction ratio B(B+c→ψ(2S)π+)/B(B+c→J/ψπ+)

Abstract : Using pp collision data collected by LHCb at center-of-mass energies s√ = 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3 fb−1, the ratio of the branching fraction of the B+c→ψ(2S)π+ decay relative to that of the B+c→J/ψπ+ decay is measured to be 0.268 ± 0.032 (stat) ± 0.007 (syst) ± 0.006 (BF). The first uncertainty is statistical, the second is systematic, and the third is due to the uncertainties on the branching fractions of the J/ψ→μ+μ− and ψ(2S)→μ+μ− decays. This measurement is consistent with the previous LHCb result, and the statistical uncertainty is halved.
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Contributor : Claudine Bombar <>
Submitted on : Thursday, July 16, 2015 - 2:52:49 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:10 PM

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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Measurement of the branching fraction ratio B(B+c→ψ(2S)π+)/B(B+c→J/ψπ+). Physical Review D, American Physical Society, 2015, 92, pp.072007. ⟨10.1103/PhysRevD.92.072007⟩. ⟨in2p3-01177048⟩



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