Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible $D\bar{D}$ and $B\bar{B}$ Molecular states in a chiral quark
  model   We perform a systematic study of the bound state problem of $D\bar{D}$ and
$B\bar{B}$ systems by using effective interaction in our chiral quark model.
Our results show that both the interactions of $D\bar{D}$ and $B\bar{B}$ states
are attractive, which consequently result in $I^G(J^{PC})=0^+(0^{++})$
$D\bar{D}$ and $B\bar{B}$ bound states.

29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat