CPNonconservation andK→ll¯γDecays

Abstract

A simple model which explains the observed suppression of the $K_L\to {\mu }^{+}{\mu }^{-}$ rate has been used to calculate the $\mathrm{CP}$-violating contribution to $K\to l\overline{l}\gamma$ decays. For $K_L\to {\mu }^{+}{\mu }^{-}\gamma$ this rate is comparable to the Dalitz-pair rate while for $K_L\to e^{+}{e}^{-}\gamma$ and $K_S\to l\overline{l}\gamma$ the contribution is small.