2024/03/29 by L. N. Falcao, Falcao, Lucas
Physics and Astronomy · #Particle physics theoretical and experimental studies #Neutrino Physics Research #Radioactive Decay and Measurement Techniques
paper · pdf · doi:10.48550/arxiv.2403.19921
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^± → π^± π+ π- and B^± → K^± K+ K- decays, while the previously observed asymmetry in B^± → π^± K+ K- decays is confirmed, and the CP asymmetry of B^± → K^± π+ π- 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^± π+ π- decays dominated by ρ(770), representing the first observation of CP violation in this process. Other decay channels show CP asymmetries compatible with zero.