Observations of Λb 0 → ΛK+π and Λb 0 → ΛK+ K decays and searches for other Λb 0 and Ξb 0 decays to Λh+ h′ final states

The LHCb Collaboration

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A search is performed for the charmless three-body decays of the Λb 0 and Ξb 0 baryons to the final states Λh+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 Λb 0 → ΛK+π and Λb 0 → ΛK+K decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λb 0 → Λπ+π decay and limits are set on the branching fractions of Ξb 0 baryon decays to the Λh+h′ final states.

Original languageEnglish
Article number81
JournalJournal of High Energy Physics
Issue number5
Publication statusPublished - 1 May 2016


  • Branching fraction
  • CP violation
  • Flavor physics
  • Hadron-Hadron scattering (experiments)
  • Rare decay


Dive into the research topics of 'Observations of Λ<sub>b</sub> <sup>0</sup> → ΛK<sup>+</sup>π<sup>−</sup> and Λ<sub>b</sub> <sup>0</sup> → ΛK<sup>+</sup> K<sup>−</sup> decays and searches for other Λ<sub>b</sub> <sup>0</sup> and Ξ<sub>b</sub> <sup>0</sup> decays to Λh<sup>+</sup> h′<sup>−</sup> final states'. Together they form a unique fingerprint.

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