Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiative Dileptonic Decays of B Mesons   We investigate the radiative dileptonic decays $B_s(B_d)\to\gamma l^+l^-$
within the standard model. Using the constituent quark model, the branching
ratios turn out to be around $5\times 10^{-9}$ for $B_s\to \gamma \mu^+\mu^- $
and around $6\times 10^{-10}$ for $B_d \to \gamma \mu^+\mu^- $, with slightly
larger values for $B_s(B_d) \to \gamma e^+e^- $. The differential rate as a
function of the dilepton invariant mass is given. The possibility of using
these processes to determine the decay constants of $B_s$ or $B_d$ is
discussed.

23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg