Daniel Patrick O'Hanlon (INFN Bologna)
Until very recently, all observations of CP violation in B decays were in (quasi-)two-body decays. However, it has long been conjectured that the complex interplay between the strong and weak dynamics exhibited in multi-body B decays is crucial to understanding how CP violation in the Standard Model manifests in practice. Now, with data collected by the LHCb experiment, we are finally in a position to explore these remarkable processes in unprecedented detail.
Presented here are the latest results from LHCb on B+ decays to three charged hadrons, where by constructing an explicit model for the quantum-mechanical decay amplitudes, one can for the first time gain a more complete picture of how CP violation manifests in practice. These results include some of the largest CP-violating asymmetries observed in nature, and in addition, the first observation of CP-violation in the interference between resonant states.