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.

Observations of Lambda(0)(b) -> Lambda K+pi(-) and Lambda(0)(b) -> Lambda K+K- decays and searches for other Lambda(0)(b) and Xi(0)(b) decays to Lambda h(+)h '(-) final states

COGONI, VIOLETTA;Dettori, F.;Lai, A.;MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;SAITTA, BIAGIO;VACCA, CLAUDIA;
2016

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/192072
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