Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse $\Lambda^0$ polarization in inclusive photoproduction: quark
  recombination model   Transverse polarization of $\Lambda^0$ hyperons in inclusive photoproduction
at x_F>0 is tackled within the framework of the quark recombination model,
which has been successfully applied to the polarization of different hyperons
in a variety of unpolarized hadron-hadron reactions. The results are compared
with recent experimental data of HERMES.

3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org