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

TL;DR

This paper calculates the strong coupling constants for doubly heavy baryon transitions involving light vector mesons and estimates the radiative decay widths using light-cone sum rules, providing comparisons with other models.

Contribution

It introduces a novel calculation of strong coupling constants and radiative decay widths for doubly heavy baryons using light-cone QCD sum rules and vector-meson dominance.

Findings

Calculated decay widths for $B_{QQ}^* o B_{QQ} \gamma$ decays.

Provided estimates of strong coupling constants for doubly heavy baryon transitions.

Compared results with other theoretical approaches.

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.