# 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

## Abstract

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 language English 81 Journal of High Energy Physics 5 https://doi.org/10.1007/JHEP05(2016)081 Published - 1 May 2016

## Keywords

• Branching fraction
• CP violation
• Flavor physics