Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Arguments on the Light-mass Scalar Mesons and Concluding Remarks of the
  Meson Sessions   This report attempts to summarize the most interesting (and hopefully
important) results leading up to and including those presented at the recent
Symposium sponsored jointly by the Institute of Quantum Science at Nihon
University and KEK. My task is to present the arguments on light-mass scalar
mesons below 1 GeV from both theory and phenomenological viewpoints, including
the new insight gained on $\pi-\pi$ production and scattering amplitudes.
Specific topics are taken up, particularly on the existence of a
$\sigma$(500-600) as explanation of the twin peak anomaly in $\Upsilon(3S) \to
\Upsilon(1S)\pi\pi$, the status of $J^{PC}=1^{-+}$ states and a possible
crypto-exotic hybrid with $J^{PC}=0^{-+}$ are discussed, as well as the
intriguing enhancement in $p\bar{p}$ radiative decay from $J/\psi$.

9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs