Radiative Four--Meson Amplitudes in Chiral Perturbation Theory

Details Radiative Four--Meson Amplitudes in Chiral Perturbation Theory Radiative Four--Meson Amplitudes in Chiral Perturbation Theory

1996-03-19

arxiv.org/abs/hep-ph/9603345v1

Phys.Lett. B380 (1996) 165-170

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/0370-2693(96)00520-5

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 $\eta \ra 3\pi\gamma$, $\pi \pi \ra \pi \pi \gamma$ and $K \ra 3\pi\gamma$.

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