Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relation between the dipole polarizabilities of charged and neutral
  pions   Using the fact that the contribution of the states with isospin I=0 in the
difference of the amplitudes of the processes \gamma \gamma->\pi^+\pi^- and
\gamma\gamma->\pi^0\pi^0 is very small, we have analyzed the dispersion sum
rules for the difference between the dipole polarizabilities of the charged and
neutral pions as a function of the \sigma-meson parameters. Then taken into
account the current perturbation value of (\alpha-\beta)_\pi^0=-1.9, we have
found (\alpha-\beta)_\pi^(+-)=9.4--8.2 for values of the \sigma-meson parameter
within the region: M_s=400--550 MeV, \Gamma_s=400--600 MeV,
\Gamma_{\s->\gamma\gamma}= 0--3 keV. It has been shown that the value of the
decay width of the h_1(1170)- meson into \gamma\pi^0 can be found if the
difference (\alpha-\beta)_\pi^(+-) is reliably determined from the experiment.
Estimation of the optimal value of the decay width \sigma->\gamma\gamma has
given \Gamma_{\s->\gamma\gamma}<0.7$keV.

16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat