CP violation measurements in three-body charmless B decays

This study reports CP asymmetry measurements in charmless three-body decays of B mesons, both using the Run II data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the LHCb detector from 2015 to 2018, with an integrated luminosity of 5. 9 fb^-1. Significant CP asymmetries are observed in B^ ^ ^+ ^- and B^ K^ K^+ K^- decays, while the previously observed asymmetry in B^ ^ K^+ K^- decays is confirmed, and the CP asymmetry of B^ K^ ^+ ^- decays is found to be compatible with zero. Additionally, a new method is used to measure the CP asymmetry in charmless B PV decays, showing significant asymmetry in B^ K^ ^+ ^- decays dominated by (770), representing the first observation of CP violation in this process. Other decay channels show CP asymmetries compatible with zero.