$K\to \pi \pi \gamma$ decays: a search for novel couplings in kaon decays

Abstract

We analyze $K\to \pi \pi \gamma$ decays in the framework of Chiral Perturbation Theory. We study the different Dalitz plot distributions, trying to find regions where o($p^6$) contributions could be more easily detected. To fulfill this program we compute all the the o($p^4$) loop and counterterm contributions, finding a substantial agreement with the existing calculations and adding some small missing terms in $K_S\to \pi \pi \gamma$.

Comments: 14 pages (plain Tex), 1 postscript figure appended