Observation of the Λb0→J/ψΞ-K+ Decay
European Physical Journal C
2024
Kārlis Dreimanis,
Antra Gaile,
Guntis Pikurs,
Andris Potrebko,
Markus Seidel,
Viesturs Veckalns,
CMS Collaboration
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-).
DOI
10.1140/epjc/s10052-024-13114-9
Hipersaite
https://link.springer.com/article/10.1140/epjc/s10052-024-13114-9
The CMS Collaboration, Hayrapetyan, A., Dreimanis, K., Gaile, A., Pikurs, G., Potrebko, A., Seidel, M., Veckalns, V. ... [et al.] Observation of the Λb0→J/ψΞ-K+ Decay. European Physical Journal C, 2024, Vol. 84, No. 10, Article number 106. ISSN 1434-6044. e-ISSN 1434-6052. Pieejams: doi:10.1140/epjc/s10052-024-13114-9
Publikācijas valoda
English (en)