Measurement of K^+ \to π^0 μ^+ νγdecay using stopped kaons

E470 Collaboration, S. Shimizu, K. Horie +17

The K^+ \to π^0 μ^+ νγ($K_{\mu 3\gamma }$) decay has been measured with stopped positive kaons at the KEK 12 GeV proton synchrotron. A $K_{\mu 3\gamma }$ sample containing 125 events was obtained.…