The decays Λb0→Λc+D¯(∗)0K- and Λb0→Λc+Ds∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb0→Λc+Ds- mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb0→Λc+D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds-→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb0→Λc+D¯(∗)0K- decay channels.

Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(6) [10.1140/epjc/s10052-024-12752-3].

Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Gotti C.;Kirsebom V. S.;Malentacca L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2024

Abstract

The decays Λb0→Λc+D¯(∗)0K- and Λb0→Λc+Ds∗- are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb0→Λc+Ds- mode are measured to be (Formula presented.) where the first uncertainties are statistical, the second systematic, and the third, for the Λb0→Λc+D¯(∗)0K- decays, are due to the uncertainties on the branching fractions of the Ds-→K-K+π- and D¯0→K+π- decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb0→Λc+D¯(∗)0K- decay channels.
Articolo in rivista - Articolo scientifico
Branching fractions; Decay channels; Decay mode; Effective theories; Integrated luminosity; Normalisation; Pentaquark search; Proton proton collisions; Uncertainty
English
5-giu-2024
2024
84
6
575
none
Aaij, R., Abdelmotteleb, A., Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(6) [10.1140/epjc/s10052-024-12752-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/530244
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