Search for K L 0 →μ+e and K L 0 →e+e

We report on a search for the flavor-changing neutral-current decays ${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}+e and ${K}_{L}^{0}$\ensuremath{\rightarrow}e+e. Limits obtained for these processes are B(${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}+e)6.7\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}9}$ and B(${K}_{L}^{0}$\ensuremath{\rightarrow}e+e)4.5\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}9}$ (90% confidence level).