Аннотация

The Λb0→Λc+K+Kπ decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of s=7 and 8TeV collected by the LHCb detector, corresponding to an integrated luminosity of 3fb−1. The ratio of branching fractions between the Λb0→Λc+K+Kπ and the Λb0→Λc+Ds decays is measured to be [Formula presented] where the first uncertainty is statistical, the second systematic and the third is due to the knowledge of the Ds→K+Kπ branching fraction. No structure on the invariant mass distribution of the Λc+K+ system is found, consistent with no open-charm pentaquark signature.

Язык оригиналаанглийский
Номер статьи136172
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том815
DOI
СостояниеОпубликовано - 10 апр. 2021

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ
  • 1.03.BU АСТРОНОМИЯ И АСТРОФИЗИКА

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