Decay of vector-vector resonances into $γ$ and a pseudoscalar meson
We study the decay of dynamically generated resonances from the interaction of two vectors into a $γ$ and a pseudoscalar meson. The dynamics requires anomalous terms involving vertices with two vectors and a pseudoscalar, which renders it special. We compare our result with data on $K^{*+}(1430)\to K^+γ$ and $K^{*0}(1430)\to K^0γ$ and find a good agreement with the data for the $K^{*+}(1430)$ case and a width considerably smaller than the upper bound measured for the $K^{*0}(1430)$ meson.
hep-ph↗