Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analyzing $\Xi(1620)$ in the molecule picture in the Bethe-Salpeter
  equation approach   In this work, we assume that the observed state $\Xi(1620)$ is a $s$-wave
$\Lambda\bar{K}$ or $\Sigma\bar{K}$ bound state. Based on this molecule
picture, we establish the Bethe-Salpeter equations for $\Xi(1620)$ in the
ladder and instantaneous approximations. We solve the Bethe-Salpeter equations
for the $\Lambda\bar{K}$ and $\Sigma\bar{K}$ systems numerically and find that
the $\Xi(1620)$ can be explained as $\Lambda\bar{K}$ and $\Sigma\bar{K}$ bound
states with $J^P=1/2^-$, respectively. Then we calculate the decay widths of
$\Xi(1620)\rightarrow\Xi\pi$ in these two different molecule pictures systems,
respectively.

33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
2
The categories of this paper are: math