Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study the exotic $\Theta^+$ with polarized photon beams   We carry out an analysis of the pentaquark $\Theta^+$ photoproduction with
polarized photon beams. Kinematical and dynamical aspects are examined for the
purpose of determining $\Theta^+$'s spin and parity. It shows that the
polarized photon beam asymmetry in association with certain dynamical
properties of the production mechanism would provide further information on its
quantum numbers. Facilities at SPring-8, JLab, ELSA, and ESRF will have access
to them.

31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con