Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cabibbo-Kobayashi-Maskawa-favored $B$ decays to a scalar meson and a $D$
  meson   Within the perturbative QCD approach, we investigated the
Cabibbo-Kobayashi-Maskawa-favored $B \to \overline{D} S$ ("$S$" denoting the
scalar meson) decays on the basis of the two-quark picture. Supposing the
scalar mesons are the ground states or the first excited states, we calculated
the the branching ratios of 72 decay modes. Most of the branching ratios are in
the range $10^{-4}$ to $10^{-7}$, which can be tested in the ongoing LHCb
experiment and the forthcoming Belle-II experiment. Some decays, such as $B^+
\to \overline{D}^{(*)0} a_0^+(980/1450)$ and $B^+ \to D^{(*)-}
a_0^+(980/1450)$, could be used to probe the inner structure and the character
of the scalar mesons, if the experiments are available. In addition, the ratios
between the $Br(B^0\to \overline{D}^{(*)0}\sigma)$ and $Br(B^0\to
\overline{D}^{(*)0}f_0(980))$ provide a potential way to determine the mixing
angle between $\sigma$ and $f_0(980)$. Moreover, since in the standard model
these decays occur only through tree operators and have no $CP$ asymmetries,
any deviation will be signal of the new physics beyond the standard model.

5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th