Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The radiative decays $B_c^{*\pm} \to B_c^{\pm} \gamma $ with QCD sum
  rules   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.

1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an