The rare decay $\eta \to \pi \pi \gamma \gamma$ in chiral perturbation theory

Abstract

We investigate the rare radiative eta decay modes $\eta \to {\pi }^{+}{\pi }^{-}\gamma \gamma$ and $\eta \to {\pi }^0{\pi }^0\gamma \gamma$ 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.

arXiv comment26 pages, RevTex, 10 figures, to appear in Phys. Rev. D

References in corpus (1)

• Cross section for $\gamma \gamma \to {\pi }^{+}{\pi }^{-}{\pi }^0$ in chiral perturbation theory

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