Abstract
The observation of the Λb 0→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(Λb 0→J/ψΛϕ)/B(Λb 0→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.
Original language | English |
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Article number | 135203 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 802 |
DOIs | |
Publication status | Published - 10 Mar 2020 |
Externally published | Yes |
Keywords
- CMS
- Computing
- Heavy-flavor spectroscopy
- b physics
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The CMS collaboration (2020). Observation of the Λb 0→J/ψΛϕ decay in proton-proton collisions at s=13TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 802, Article 135203. https://doi.org/10.1016/j.physletb.2020.135203