The radiative decay $D^0 \to \bar{K}^{*0} \gamma$ with vector meson dominance

TL;DR

This paper models the radiative decay $D^0 o ar{K}^{*0} \gamma$ using vector meson dominance, linking it to other decay modes, and predicts a branching ratio consistent with experimental data.

Contribution

It introduces a model connecting $D^0$ radiative decay to vector meson decays via vector meson dominance and hidden gauge symmetry, providing a theoretical estimate aligned with experiments.

Findings

Predicted branching ratio: (1.55 - 3.44)×10^{-4}

Model aligns with Belle and Babar measurements

Uses hidden gauge symmetry for $V o ext{photon}$ conversion

Abstract

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.