Observations of Λ b 0 → Λ K + π − and Λ b 0 → Λ K + K − decays and searches for other Λ b 0 and Ξ b 0 decays to Λ h + h ′ − final states
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Journal of High Energy Physics（2016）
Cited 44|Views32
Abstract
bstract A search is performed for the charmless three-body decays of the Λ b 0 and Ξ b 0 baryons to the final states Λ h + h ′ − , where h ( ′ ) = π or K . The analysis is based on a data sample, corresponding to an integrated luminosity of 3 fb −1 of pp collisions, collected by the LHCb experiment. The Λ b 0 → Λ K + π − and Λ b 0 → Λ K + K − decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λ b 0 → Λπ + π − decay and limits are set on the branching fractions of Ξ b 0 baryon decays to the Λ h + h ′ − final states.
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Key words
Branching fraction, CP violation, Flavor physics, Rare decay, Hadron-Hadron scattering (experiments)
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