Strong $$ B _{QQ'}^* B_{QQ'} V $$ vertices and the radiative decays of $$ B _{QQ}^* \rightarrow B_{QQ} \gamma $$ in the light-cone sum rules

Abstract

The strong coupling constants of spin-3/2 to spin-1/2 doubly heavy baryon transitions with light vector mesons are estimated within the light-cone QCD sum rules method. Moreover, using the vector-meson dominance ans\"atz, the widths of radiative decays $B_{QQ}^* \to B_{QQ} \gamma$ are calculated. The results for the said decay widths are compared to the predictions of other approaches.