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-).

Null, N., Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., et al. (2024). Observation of the Λ0b → J/ψΞ−K+ decay. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(10), 1-24 [10.1140/epjc/s10052-024-13114-9].

Observation of the Λ0b → J/ψΞ−K+ decay

Battilana, C.;Bonacorsi, D.;Borgonovi, L.;Capiluppi, P.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Fasanella, D.;Giommi, L.;Guiducci, L.;Navarria, F. L.;Rossi, A. M.;Rovelli, T.;Siroli, G. P.;
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-).
2024
Null, N., Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., et al. (2024). Observation of the Λ0b → J/ψΞ−K+ decay. EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(10), 1-24 [10.1140/epjc/s10052-024-13114-9].
Null, Null; Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Valle, A. Escala...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1003364
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