We point out that the decay mode $K_L$→${\pi }^0$$e^{+}$$e^{\mathrm{-}}$ is predominantly CP violating in the standard model and is expected to occur with a branching ratio of several parts in ${10}^{12}$. The decay should be sensitive to direct ΔS=1 CP violation. Analysis of the Dalitz plot may enable the CP-violating nature of the process to be confirmed.

• Received 30 October 1986

DOI:https://doi.org/10.1103/PhysRevD.35.2769