Magnetic Radiation inK±→π±π0γDecays

Abstract

An estimate of the strength of the magnetic radiation term in $K^{\pm }\to {\pi }^{\pm }{\pi }^0\gamma$ decays is made by relating it to the ${\tau }^{+}$ decay rate and using the Veneziano model to give the off-mass-shell dependence of the amplitudes. We find this strength to be small ($\left|x_m\right|\le 0.14$) and practically constant in the kinetic-energy range $55 \mathrm{MeV}\le T_{{\pi }^{+}}\le 80 \mathrm{MeV}$. The results are discussed in the light of $K^{\pm }\to {\pi }^{\pm }{\pi }^0\gamma$ data, particularly for possible $\mathrm{CP}$-violating effects.