CP Violation of baryon decays

by Fu-Sheng Yu (Lanzhou U.)

Monday 10 Feb 2025, 16:00 → 17:00 Europe/Berlin

ENC-D308

CP violation (CPV) is one of the three conditions for the matter-antimatter asymmetry in the Universe. The visible matter primarily consists of baryons. Nevertheless, despite observations of CP violation in mesons over several decades, experimental evidence for CP violation in baryon decays remains elusive. This raises important questions: Why is the CPV in baryons less pronounced than in mesons? What processes are most promising for detecting baryon CPV? In this talk, I will discuss the recent progresses on these questions. It has been found that the partial-wave-amplitude CPV tends to cancel each other, leading to the small CPV of baryons. Furthermore, a new CPV mechanism has been proposed, which involves final-state N\pi rescatterings in the decays of heavy-flavor baryons. It predicts the CPV that are sufficiently large for observation using the current LHCb data.