Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Infrared Limit of Two Dimensional QCD   We study the infrared limit of two dimensional QCD, with massless dynamical
Dirac fermions that are in the fundamental representation of the gauge group.
We find that the theory reduces to a spin generalization of the Calogero model
with an additional magnetic coupling which is of the Pauli type.

15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph