Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible $\Sigma({1\over2}^-)$ under the $\Sigma^*(1385)$ peak in
  $K\Sigma^*$ photoproduction   The LEPS collaboration has recently reported a measurement of the reaction
$\gamma n\to K^+\Sigma^{*-}(1385)$ with linearly polarized photon beam at
resonance region. The observed beam asymmetry is sizably negative at
$E_\gamma=1.8-2.4 \mathrm{GeV}$, in contrast to the presented theoretical
prediction. In this paper, we calculate this process in the framework of the
effective Lagrangian approach. By including a newly proposed
$\Sigma(J^P={1\over2}^-)$ state with mass around 1380~MeV, the experimental
data for both $\gamma n$ and $\gamma p$ experiments can be well reproduced. It
is found that the $\Sigma({1\over2}^-)$ and/or the contact term may play
important role and deserve further investigation.

2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg