Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CP Violation in Two-Body Hadronic Decays of $B_c$ Meson   Using the next-to-leading order low energy effective Hamiltonian, the CP
asymmetries for the $B_{c}$ meson decays into meson pair are calculated in the
spectator approximation. We do not compute the hadronic matrix elements
directly, instead, we use the amplitude ratios to estimate the CP asymmetries.
This is quite,different from the previous works in the literature. The values
of the momentum squared carried by the virtual particles in timelike penguin
dirgrams are also carefully discussed. From our calculated results, the best
decay modes to observe CP violation in $B_{c}$ decays would be $B_{c}^-\to{\bar
D}^{*0}K^{*-}$, ${\bar D}^{0}K^{*-}$, ${\bar D}^{*0} K^{-}$, ${\bar
D}^{0}K^{-}$ and $B_{c}^-\to{\eta}_{c}D^{-}$, which need about $10^8$ of
$B_{c}^{\pm}$ events in experiment.

33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an