Quark Triangle Diagrams and Radiative Meson Decays

Abstract

The radiative meson decays V→ Pγ and P →γγ are analysed using the quark triangle diagram. Experimental data yield well determined estimates of the universal quark–antiquark–meson couplings g_vqq′ and g_pqq′ for the light meson sector. Also predictions for the ratios of neutral to charged heavy meson decay coupling constants are given and await experimental confirmation.