Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of the Light Scalar Mesons from a Coupled Channel Analysis of
  the s-wave pi pi - k kbar Scattering   The analysis of the poles of the $\pi\pi$ scattering amplitude is shown to
favour a dynamical origin of the sigma meson: it is created by a strongly
attractive $\pi\pi$ interaction in the $J^{PC}=0^{++}I=0$ channel. In the limit
$N_c\to\infty$, the $\sigma$ meson disappears, contrary to the case of
conventional $q\bar{q}$ states. Implications for the search of the scalar
$q\bar{q}$ and glueball states are discussed.

33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
1
The categories of this paper are: cs
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin