Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on inequalities for the masses of the lightest pi-pi resonances
  in large N_c QCD   We derive and analyse inequalities relating masses of the lightest pi-pi
resonances (rho and sigma) to low energy couplings of the effective chiral
Lagrangian in the limit of large number of colours.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg