Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cross-Sections of Large-Angle Hadron Production in Proton- and
  Pion-Nucleus Interactions I: Beryllium Nuclei and Beam Momenta of +8.9 Gev/c
  and -8.0 Gev/c
2
The categories of this paper are: math
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org