Neutral Semileptonic Decays ofKMesons

Abstract

The question of the existence of neutral leptonic currents coupled to the neutral strangeness-changing current is discussed in the light of recent experimental limits on ${K_2}^0\to {\mu }^{+}{\mu }^{-}$ and ${K_2}^0\to e^{+}{e}^{-}$ decay rates.