Motivated by the experimental measurements of $D^0$ radiative decay modes we have proposed a model to study the $D^0\to \bar{ K}^{ *0}\gamma$ decay, by establishing a link with $D^0\to \bar{ K}^{ *0}V$ $(V=\rho^0,\, \omega)$ decays through the vector meson dominance hypothesis. In order to do this properly, we have used the Lagrangians from the local hidden gauge symmetry approach to account for $V\gamma$ conversion. As a result, we have found the branching ratio $\mathcal{ B}[D^0\to \bar{ K}^{ *0}\gamma] =(1.55 - 3.44)\times 10^{ -4}$, which is in fair agreement with the experimental values reported by Belle and Babar collaborations.
Categories: hep-ph