CPV in charm decays at Belle II

• Yifan Jin (Brookhaven National Laboratory (US))

Charge-Parity violation (CPV) plays a fundamental role in modern physics. It was first experimentally discovered in kaon decays in 1964 at BNL. The underlying mechanism was established only in the 2000s, when the Kobayashi-Maskawa theory was verified through studies of B mesons at the Belle and BaBar experiments. In the charm sector, however, the Standard Model predicts that CPV should be very small. The first observation of CP violation in charm decays was reported only recently, in 2019 by the LHCb experiment. CPV in charm decays thus serves as a sensitive probe for new physics, particularly if the observed violation exceeds predictions from the Kobayashi-Maskawa mechanism. In this presentation, we report several analyses of CP violation in charm decays based on data collected by the Belle II experiment, conducted with contributions from BNL.