Aperitivo Scientifico: Precision studies of quantum-mechanical interferences between multi-body B-meson decay amplitudes at the LHCb experiment

by Daniel Patrick O'Hanlon (BO)

Friday 28 Jun 2019, 11:30 → 12:30 Europe/Rome

Sala Riunioni, primo piano (DIFA, via Irnerio)

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.

20190628seminarBologna.pdf