$γγ\to πππ$ to One Loop in Chiral Perturbation Theory

Details $γγ\to πππ$ to One Loop in Chiral Perturbation Theory $γγ\to πππ$ to One Loop in Chiral Perturbation Theory

1995-12-13

arxiv.org/abs/hep-ph/9512296v3

Phys.Lett. B376 (1996) 186-192

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 postscript figures, uses epsfig.sty. The cross-section for the neutral channel has been corrected but the main con

Scientific paper

10.1016/0370-2693(96)00299-7

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 major role. This makes these processes a good test of ChPT, mainly in its anomalous sector. We correct earlier numerical results at tree level and determine the one-loop results as well.

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