Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong hadronic decays in QCD_2   Strong hadronic decays are discussed in the 't Hooft model for the
two-dimensional QCD in the limit of infinite number of colours. Adler
selfconsistency condition is derived for decays with pions in the final state
and the corresponding amplitude is demonstrated to vanish identically in the
chiral limit.

16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex