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±K+K- decays is confirmed, and CP asymmetries are observed with a significance of more than five standard deviations in the B±→π±π+π- and B±→K±K+K- decays, while the CP asymmetry of B±→K±π+π- decays is confirmed to be compatible with zero. The distributions of these asymmetries are also studied as a function of the three-body phase space and suggest contributions from rescattering and resonance interference processes. An indication of the presence of the decays B±→π±χc0(1P) in both B±→π±π+π- and B±→π±K+K- decays is observed, as is CP violation involving these amplitudes.

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

Graverini E.;Punzi G.;
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±K+K- decays is confirmed, and CP asymmetries are observed with a significance of more than five standard deviations in the B±→π±π+π- and B±→K±K+K- decays, while the CP asymmetry of B±→K±π+π- decays is confirmed to be compatible with zero. The distributions of these asymmetries are also studied as a function of the three-body phase space and suggest contributions from rescattering and resonance interference processes. An indication of the presence of the decays B±→π±χc0(1P) in both B±→π±π+π- and B±→π±K+K- decays is observed, as is CP violation involving these amplitudes.
2023
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C.; Aidala, C...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1221901
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