The rare decay $\hat{I}\cdot \to \ddot{I}€\ddot{I}€{\hat{I}}^3{\hat{I}}^3$ in chiral perturbation theory

Abstract

We investigate the rare radiative eta decay modes $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{\hat{I}}^3{\hat{I}}^3$ and $\hat{I}\cdot \to \ddot{I}{€}^0\ddot{I}{€}^0{\hat{I}}^3{\hat{I}}^3$ within the framework of chiral perturbation theory at $O(p^4)$. We present photon spectra and partial decay rates for both processes as well as a Dalitz contour plot for the charged decay.

26 pages, RevTex, 10 figures, to appear in Phys. Rev. D