Speaker
Yohei Ema
(University of Florida)
Description
In this talk, I will explain a recent reevaluation of the CP-odd semileptonic operator arising from the CKM phase within the Standard Model (SM). It is dominated by the combination of the electroweak penguin diagrams and $\Delta I = 1/2$ weak transitions in the baryon sector, and is calculable within chiral perturbation theory. The predicted size of the semileptonic operator corresponds to the equivalent electron EDM of $10^{-35}$ ecm. While still far from the current observational limits, this result is three orders of magnitude larger than previously believed. In addition, I will discuss several beyond-SM CP violation operators that can be directly and indirectly probed by the EDM experiments.