Radiative Four--Meson Amplitudes in Chiral Perturbation Theory

Abstract

We present a general discussion of radiative four--meson processes to $O(p^4)$ in chiral perturbation theory. We propose a definition of ``generalized bremsstrahlung'' that takes full advantage of experimental information on the corresponding non--radiative process. We also derive general formulae for one--loop amplitudes which can be applied, for instance, to $η\ra 3πγ$, $ππ\ra ππγ$ and $K \ra 3πγ$.

8 pages, LaTex file, 1 figure. Full postscript version at this URL http://hpteor.lnf.infn.it/dafnepapers.html

References in corpus (2)

• Non-Leptonic Kaon Decays and the Chiral Anomaly
• $K\to \pi \pi \gamma$ decays: a search for novel couplings in kaon decays

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