Measurement of $\Gamma (K_{\mu 3})/\Gamma (K_{e3})$ ratio using stopped positive kaons

Keito Horie, KEK-E246 Collaboration

The ratio of the $K^{+}\to {\pi }^0{\mu }^{+}\nu$ ($K_{\mu 3}^{+}$) and $K^{+}\to {\pi }^0{e}^{+}\nu$ ($K_{e3}^{+}$) decay widths, $\Gamma (K_{\mu 3})/\Gamma (K_{e3})$, has been measured with stopped positive kaon…