What do we know in fact about T‐odd, but P‐even interactions?

Abstract

General structure of fermion‐fermion and photon‐fermion interactions is presented. Radiative corrections, due to the P‐odd part of the electroweak interaction, transform the T‐odd, but P‐even fermion‐fermion interaction into a T‐odd and P‐odd one. The experimental information about T‐odd, P‐odd effects is sufficiently rich to obtain in this way new limits on the parameters of T‐odd, P‐even electron‐electron, electron‐nucleon, and nucleon‐nucleon interactions, as well as on some β‐decay parameters. These limits are much better than those known previously.