Hidden Local Symmetry for Anomalous Processes with Isospin/SU(3) Breaking Effects

Abstract

We show that isospin/SU(3) breaking terms can be introduced to the anomalous VVP coupling in the hidden local symmetry scheme without changing Wess-Zumino-Witten term in the low-energy limit. We make the analysis for anomalous processes of 2-body and 3-body decays; radiative vector meson decays(V \to Pγ), conversion decays of photon into a lepton pair(V \to P l^+ l^-) and hadronic anomalous decays(V \to PPP). The predictions successfully reproduce all experimental data of anomalous decays. In particular, we predict the decay widths of ρ^0 \to π^0 γand ϕ\to η' γas 101 \pm 9 keV and 0.508 \pm 0.035 keV, respectively, which will be tested in the DAFNE ϕ-factory. Moreover, prediction is also made for ϕ\to π^0 e^+ e^-, ρ\to 3π, K^* \to K ππand so on, for which only the experimental upper bounds are available now.