The decay $K\to \pi e^{+}{e}^{-}$ is considered in the six-quark model. The effective Hamiltonian applicable to such decays is calculated in leading-logarithmic approximation and attention is focused on the magnitude of $\mathrm{CP}$-violating effects.

• Received 21 January 1980

DOI:https://doi.org/10.1103/PhysRevD.21.3150