CP violation in heavy hadron decays

by Patricia Magalhaes (UCM)

Tuesday 20 Dec 2022, 12:00 → 13:30 Europe/Madrid

IFAE Seminar Room + Zoom (Hybrid Seminar)

One of the main open questions in particle physics is the observed mater-antimatter asymmetry in our Universe. On the theoretical side, the Standard Model can generate an asymmetry toward CP violation (CPV) mechanisms. However, the amount known is still not enough. From the experimental side, this is one of the targets of LHCb collaboration, the large hadron collider beauty facility at CERN. CPV measurements are then, widely recognized as a highly sensitive probe of the Standard Model with new sources needed to account for the mater-antimatter asymmetry observed in the Universe.

There is a long-term discussion involving the source of the strong phase needed to generate direct CPV in charmless B and D decays. It could be new physics or due to non-perturbative hadronic contributions that are difficult to calculate from first principles. In this talk, I will present the main issues and ongoing research on CP violation in heavy-meson hadronic decays. I will show thatthe hadronic final state interactions can be a source of some observed asymmetries in B → hhh (h = π, K). I will also show in more detail a recent result where one can enhance the charge-parity (CP) violation difference between D0 → π−π+ and D0 → K−K+ decay up to the current experimental value recently observed by the LHCb collaboration.

Patricia_IFAE2022.pdf