Observation of ᴧ b 0→ ᴧ c +(*)0K and ᴧ b 0→ ᴧ c + D s *− decays

LHCb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The decays Λb0→Λc+(∗)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+(∗)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+(∗)0K- decay channels.

Original languageEnglish
Article number575
Pages (from-to)1-18
Number of pages18
JournalThe European Physical Journal C : Particles and Fields
Volume84
Issue number6
Early online date5 Jun 2024
DOIs
Publication statusPublished - Jun 2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

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