Observation of the Λb0→J/ψΛϕ decay in proton-proton collisions at s=13TeV

CMS Collaboration; Sirunyan, A. M.; KAPOOR, A.; RASTOGI, A.; KOTHEKAR, K.; DUBE, SOURABH; PANDEY, S.; SHARMA, SEEMA et al.; KANSAL, B.; RANE, A.

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Observation of the Λb0→J/ψΛϕ decay in proton-proton collisions at s=13TeV

CMS Collaboration; Sirunyan, A. M.; DUBE, SOURABH; KANSAL, B.; KAPOOR, A.; KOTHEKAR, K.; PANDEY, S.; RANE, A.; RASTOGI, A.; SHARMA, SEEMA et al.

URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4546 https://doi.org/10.1016/j.physletb.2020.135203 Date: 2020-03

Abstract:

The observation of the Λb0→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb−1. The ratio of the branching fractions B(Λb0→J/ψΛϕ)/B(Λb0→ψ(2S)Λ) 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.

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