New Experimental Limits On Kl0-]Mu-E And Kl0-]Ee Branching Ratios

A search for the decays ${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}e and ${K}_{L}^{0}$\ensuremath{\rightarrow}ee has produced no examples of either process. When normalized to the decay ${K}_{L}^{0}$\ensuremath{\rightarrow}${\ensuremath{\pi}}^{+}$${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$, the 90%-C.L. upper limits on the branching ratios are B(${K}_{L}^{0}$\ensuremath{\rightarrow}\ensuremath{\mu}e)2.2\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ and B(${K}_{L}^{0}$\ensuremath{\rightarrow}ee)3.2\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$. .AE