Branching ratio and PossibleCPNonconservation in RadiativeKπ2Decay

Abstract

We have determined with 90% confidence an upper limit of 1.90×${10}^{-4\mathrm{}}$ for the branching ratio of the decay mode $K^{+}\to {\pi }^{+}+{\pi }^0+\gamma$ in the range of $T_{{\pi }^{+}}$ from 55 to 80 MeV. We discuss the implications of this result for a possible $\mathrm{CP}$ nonconservation in radiative $K_{\pi 2}$ decay.