Observation of the decay modeKL0→γγee

Results of a search for the decay mode $K_L^0\to \gamma \gamma \mathrm{ee}$ $K_L^0\to \gamma \mathrm{ee}$ with a hard internal bremsstrahlung) are reported. The measured branching ratio is (6.6±3.2) × ${10}^{-7\mathrm{}}$, in agreement with the QED prediction of 5.8 × ${10}^{-7\mathrm{}}$. The infrared cutoff for both branching ratios is the requirement that both photons have an energy of at least 5 MeV on the center of mass.