Observations of Λ b 0 → ΛK +π− and Λ b 0 → ΛK + K − decays and searches for other Λ b 0 and Ξ b 0 decays to Λh + h′− final states

A search is performed for the charmless three-body decays of the Λb0 and Ξb0 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 Λb0 → ΛK+π− and Λb...

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Bibliographic Details
Main Authors: Aaij, R, Abellán Beteta, C, Adeva, B, Cheung, S, Evans, T, Gandini, P, Hadavizadeh, T, Harnew, N, Hill, D, Hussain, N, Jalocha, J, John, M, Lupton, O, Malde, S, Nandi, A, Qian, W, Stevenson, S, Thomas, C, Topp-Joergensen, S, Wilkinson, G, LHCb Collaboration
Format: Journal article
Published: Springer Verlag 2016
Description
Summary:A search is performed for the charmless three-body decays of the Λb0 and Ξb0 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 Λb0 → ΛK+π− and Λb0 → ΛK+K− decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λb0 → Λπ+π− decay and limits are set on the branching fractions of Ξb0 baryon decays to the Λh+h′− final states.