Riccardo Manfredi (BNL), CP violation in charm decays: new results from Belle II

Monday 20 Oct 2025, 12:45 → 13:55 US/Eastern

D-122 (SBU Physics building)

Ciro Riccio (Stony Brook University (US)), Hannah Arnold (Stony Brook University)

12:45 → 13:30 CP violation in charm decays: new results from Belle II

Charge-parity violation (CPV) plays a central role in modern particle physics. After its discovery in kaon decays and the subsequent confirmation of the Kobayashi-Maskawa mechanism through studies of B mesons, attention has turned to the charm sector. In this case, the Standard Model predicts CPV to be extremely small, often beyond the reach of current experiments. Any significant deviation from these tiny expectations could therefore signal contributions from new physics. The first evidence of CP violation in charm decays was only reported by LHCb in 2019.
The Belle II experiment at the SuperKEKB collider in Japan provides an excellent environment to pursue these studies, combining large data samples with a clean experimental setting. This seminar will present recent Belle II analyses of CP violation in charm decays, carried out with contributions from the BNL group, and illustrate the experimental strategies and current results achieved.

Speaker: Riccardo Manfredi (Brookhaven National Laboratory (US))

CharmCPV_seminar_Manfredi.pdf