$\gamma \gamma \to \pi \pi \pi$ to One Loop in Chiral Perturbation Theory

P. Talavera, Ll. Ametller, J. Bijnens +2

The $\gamma \gamma \to {\pi }^0{\pi }^0{\pi }^0$ and $\gamma \gamma \to {\pi }^{+}{\pi }^{-}{\pi }^0$ amplitudes are discussed in the general context of Chiral Perturbation Theory (ChPT) to $O(p^6)$. Chiral loops are found to play a m…