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.
(2024). Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays [journal article - articolo]. In THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. Retrieved from https://hdl.handle.net/10446/281989
Observation of ᴧb0→ ᴧc+ D̄(*)0K− and ᴧb0→ ᴧc+ Ds*− decays
Lupato A.;Redi F.;
2024-01-01
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.File | Dimensione del file | Formato | |
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