A phenomenological description of K -> pi pi gamma magnetic transitions

A phenomenological analysis of K --> pi pi gamma (K-L --> pi (+)pi (-)gamma and K+ --> pi (+)pi (0)gamma) with the direct emission photon is carried o ut beyond the leading order in the chiral perturbation theory. We show that the experimental evidence for the large photon energy dependence of the ma gnetic amplitude in K-L --> pi (+)pi (-)gamma seems to indicate an interest ing consequence: vector meson dominance must be implemented at O(p(4)), whi ch is not a general feature of the chiral perturbation theory. The phenomen ology of K+ --> pi (+)pi (0)gamma is also analyzed using the same scheme.