Abstract
TheK + → π+ π0 γ andK L,S 0 → π+ → π− γ are reexamined in a simple chiral Lagrangian scheme. The inner bremsstrahlung part of the amplitude is well explained within a chiral Lagrangian approach supplemented by the 1/N expansion, while the direct emission term is generated by the effective Wess-Zumino term. The calculation of these terms does not affect the present knowledge of CP violating parameter inK L,S 0 → π+ → π− γ and also there is no implication on theK L,S 0 → π+ → π± π° γ asymmetry parameter.
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