The radiative decays $B_c^{*\pm} \to B_c^{\pm} \gamma $ with QCD sum rules

TL;DR

This paper calculates the electromagnetic form-factor for the $B_c^* o B_c$ transition using QCD sum rules and explores the radiative decay process $B_c^{* o} B_c o ext{final states}$, providing theoretical predictions for future experimental studies.

Contribution

The paper introduces a calculation of the $B_c^* o B_c$ electromagnetic form-factor using three-point QCD sum rules, advancing theoretical understanding of these radiative decays.

Findings

Calculated the $B_c^* o B_c$ form-factor with QCD sum rules.

Analyzed the radiative decay $B_c^{* o} B_c o ext{final states}$.

Suggested experimental detection methods at LHCb.

Abstract

In this article, we calculate the $B_c^* \to B_c$ electromagnetic form-factor with the three-point QCD sum rules, then study the radiative decays $ B_c^{*\pm} \to B_c^{\pm} \gamma$. Experimentally, we can study the radiative transitions using the decay cascades $B_c^{*\pm}\to B_c^{\pm} \gamma\to J/\psi \ell^{\pm}\bar{\nu}_{\ell} \gamma\to \mu^+ \mu^- \ell^{\pm}\bar{\nu}_{\ell} \gamma$ in the future at the LHCb.