Decay of K⁰ to $K^{+}{e}^{-}{\overline{\nu }}_e$

The width of the neutral kaon with respect to its decay to a positively charged kaon, an electron, and an antineutrino is calculated. The branching ratios for the decay of K_L and K_S mesons to $K^{+}{e}^{-}{\overline{\nu }}_e$ are found to be about 4 × 10⁻⁹ and 10⁻¹¹ respectively. The calculations presented in this article are also valid for neutral antikaons decaying to a negatively charged kaon, a positron, and a neutrino.