We predict the $\mathcal{ V} \to \mathcal{ P} \gamma$ decay widths and the $\mathcal{ V} \to \mathcal{ P} \gamma^{ *}$ transition form factors, where $\mathcal{ V}=(\rho, \omega, K^*, \phi)$ and $\mathcal{ P}= (\pi,K, \eta,\eta^\prime)$, using spin-improved holographic light-front wavefunctions for the mesons. We find excellent agreement with the available data for both the decay widths and the timelike transition form factors extracted from the leptonic conversion decays $\mathcal{ V} \to \mathcal{ P} l^+ l^-$.
Categories: hep-ph