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arXiv · hep-ph/9905501

Meson PVV Interactions are determined by Quark Loops

R. Delbourgo·Dongsheng Liu·M. D. Scadron
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Abstract

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 $g_{πqq}$ and $g_{ρqq}$ 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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R. Delbourgo, Dongsheng Liu, M. D. Scadron. 1999-05-27. Meson PVV Interactions are determined by Quark Loops. https://doi.org/10.1142/s0217751x99002049

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