Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Use of Dispersion Relations in the $\pi\pi$ and $K\bar K$
  Coupled-Channel System   Systematic and careful studies are made on the properties of the IJ=00
$\pi\pi$ and $K\bar K$ coupled-channel system, using newly derived dispersion
relations between the phase shifts and poles and cuts. The effects of nearby
branch point singularities to the determination of the $f_0(980)$ resonance are
estimated and and discussed.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc