Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pion-Nucleon Scattering in the Infinite Momentum Frame   A light front field theory treatment of a chiral lagrangian is applied to
pion-nucleon and nucleon-nucleon scattering.

3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th