The observation of the Lambda0b → J/ψLambdaφ decay is reported using proton-proton collision data collected at √s = 13 TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60 fb−1. The ratio of the branching fractions B(Lambda0 b → J/ψLambdaφ)/B(Lambda0b → ψ(2S)Lambda) is measured to be (8.26 ± 0.90 (stat) ± 0.68 (syst) ± 0.11(B)) × 10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of φ and ψ(2S) decays to the reconstructed final states.

Observation of the Λ^0_b →J/ψ Λ ϕ decay in proton-proton collisions at sqrt(s)=13TeV

N. Cavallo;F. Fabozzi;
2020-01-01

Abstract

The observation of the Lambda0b → J/ψLambdaφ decay is reported using proton-proton collision data collected at √s = 13 TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60 fb−1. The ratio of the branching fractions B(Lambda0 b → J/ψLambdaφ)/B(Lambda0b → ψ(2S)Lambda) is measured to be (8.26 ± 0.90 (stat) ± 0.68 (syst) ± 0.11(B)) × 10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of φ and ψ(2S) decays to the reconstructed final states.
2020
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/159389
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