Measurements of CP asymmetries in charmless three-body decays of B mesons are reported using proton-proton collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.9 fb−1. The previously observed CP asymmetry in B → π KþK− decays is confirmed, and CP asymmetries are observed with a significance of more than five standard deviations in the B → π πþπ− and B → K KþK− decays, while the CP asymmetry of B → K πþπ− decays is confirmed to be compatible with zero. The distributions of these asymmetries are also studied as a function of the threebody phase space and suggest contributions from rescattering and resonance interference processes. An indication of the presence of the decays B → π χc0ð1PÞ in both B → π πþπ− and B → π KþK− decays is observed, as is CP violation involving these amplitudes.

Direct CP violation in charmless three-body decays of B± mesons

Brundu, D.;Dettori, F.;Garau, M.;Lai, A.;Lampis, A.;Manca, G.;Oldeman, R.;Saitta, B.;
2023-01-01

Abstract

Measurements of CP asymmetries in charmless three-body decays of B mesons are reported using proton-proton collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.9 fb−1. The previously observed CP asymmetry in B → π KþK− decays is confirmed, and CP asymmetries are observed with a significance of more than five standard deviations in the B → π πþπ− and B → K KþK− decays, while the CP asymmetry of B → K πþπ− decays is confirmed to be compatible with zero. The distributions of these asymmetries are also studied as a function of the threebody phase space and suggest contributions from rescattering and resonance interference processes. An indication of the presence of the decays B → π χc0ð1PÞ in both B → π πþπ− and B → π KþK− decays is observed, as is CP violation involving these amplitudes.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/369425
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