Measurement of direct photon emission in $K^{+}\to {\pi }^{+}{\pi }^0\gamma$ decay using stopped positive kaons

Suguru Shimizu, for KEK-E470 Collaboration

The radiative decay $K^{+}\to {\pi }^{+}{\pi }^0\gamma$ ($K_{\pi 2\gamma }$) has been measured with stopped positive kaons. A $K_{\pi 2\gamma }$ sample containing 4k events was analyzed, and the $K_{\pi 2\gamma }$ branch…