Observation of the Λb0→J/ψΞ-K+ decay
Journal
The European Physical Journal C
Journal Volume
84
Journal Issue
10
Start Page
1062
ISSN
1434-6052
Date Issued
2024-10-15
Author(s)
Abstract
Using proton-proton collision data corresponding to an integrated luminosity of 140fb-1 collected by the CMS experiment at s=13TeV , the Λb0→J/ψΞ-K+ decay is observed for the first time, with a statistical significance exceeding 5 standard deviations. The relative branching fraction, with respect to the Λb0→ψ(2S)Λ decay, is measured to be B(Λb0→J/ψΞ-K+)/B(Λb0→ψ(2S)Λ)=[3.38±1.02±0.61±0.03]% , where the first uncertainty is statistical, the second is systematic, and the third is related to the uncertainties in B(ψ(2S)→J/ψπ+π-) and B(Ξ-→Λπ-) .
SDGs
Publisher
Springer Science and Business Media LLC
Type
journal article