Meson PVV Interactions are determined by Quark Loops

Details Meson PVV Interactions are determined by Quark Loops Meson PVV Interactions are determined by Quark Loops

1999-05-27

arxiv.org/abs/hep-ph/9905501v1

Int.J.Mod.Phys.A14:4331-4346,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, Revtex, one figure

Scientific paper

10.1142/S0217751X99002049

We show that all abnormal parity three-body meson interactions can be adequately described by quark loops, evaluated at zero external momentum, with couplings determined by $U(N_f)$ symmetry. We focus primarily on radiative meson decays which involve one pseudoscalar. The agreement with experiment for non-rare decays is surprisingly good and requires very few parameters, namely the coupling constants $g_{\pi qq}$ and $g_{\rho qq}$ and some mixing angles. This agreement extends to some three-body decays that are dominated by pion pairs in a P-wave state.

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