Direct Emission inK±→π±π0γ

Abstract

We present the results of a calculation of a part of the direct-emission amplitude in $K^{\pm }\to {\pi }^{\pm }{\pi }^0\gamma$ for which an unambiguous, finite, gauge-invariant expression is obtainable in terms of known parameters. The amplitude produces a small distortion of the Dalitz plot through its destructive interference with the bremsstrahlung amplitude.