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-).

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., et al. (2024). Observation of the Λb0→J/ψΞ-K+ decay. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(10) [10.1140/epjc/s10052-024-13114-9].

Observation of the Λb0→J/ψΞ-K+ decay

Xiao J.;Brivio F.;Cetorelli F.;De Guio F.;Dinardo M. E.;Gerosa R.;Ghezzi A.;Govoni P.;Guzzi L.;Lucchini M. T.;Paganoni M.;Pinolini B. S.;Ragazzi S.;de Fatis T. T.;Zuolo D.;
2024

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-).
Articolo in rivista - Articolo scientifico
Branching fractions; Integrated luminosity; Proton proton collisions; Standard deviation; Statistical significance; Uncertainty
English
15-ott-2024
2024
84
10
1062
open
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., et al. (2024). Observation of the Λb0→J/ψΞ-K+ decay. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(10) [10.1140/epjc/s10052-024-13114-9].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/577647
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