Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for new physics via CP violation in $B_{d,s} \to l^+ l^-   It is shown that in the approximation of $|\frac{q}{p}|$=1 the CP violation
in $B^0_{d,s} \to l^+ l^-$ decays vanishes in SM. In a 2HDM with CP violating
phases and MSSM the CP asymmetries depend on the parameters of models and can
be as large as 40% for $B^0_d$ and 3% for $B^0_s$. An observation of CP
asymmetry in the decays would unambiguously signal the existence of new
physics.

27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics