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Measurement of the ratio of branching fractions of the decays Λ b0 → ψ(2S)Λ and Λ b0 → J/ψΛ

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Using pp collisions corresponding to 3 fb−1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, the ratio of branching fractions B(Λ0b→ψ(2S)Λ)/B(Λ0b→J/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(B) is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used.

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Journal of High Energy Physics, 2019, p. 126

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cc-by (c) LHCb Collaboration et al., 2019

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Measurement of the ratio of branching fractions of the decays Λ b0 → ψ(2S)Λ and Λ b0 → J/ψΛ