Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of X(5568) in a unitary coupled-channel approximation of $B
  \bar{K}$ and $B_s \pi$   The potential of the $B$ meson and the pseudoscalar meson is constructed up
to the next-to-leading order Lagrangian, and then the $B \bar{K}$ and $B_s \pi$
interaction is studied in the unitary coupled-channel approximation, and a
resonant state with a mass about $5568MeV$ and $J^P=0^+$ is generated
dynamically, which can be associated with the $X(5568)$ state announced by D0
Collaboration recently. The mass and the decay width of this resonant state
depend on the regularization scale in the dimensional regularization scheme, or
the maximum momentum in the momentum cutoff regularization scheme. The
scattering amplitude of the vector $B$ meson and the pseudoscalar meson is
calculated, and an axial-vector state with a mass near $5620MeV$ and $J^P=1^+$
is produced. Moreover, their partners in the charm sector are also discussed.

2
The categories of this paper are: math
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat