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Using the fact that the contribution of the states with isospin I=0 in thedifference 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 sumrules for the difference between the dipole polarizabilities of the charged andneutral pions as a function of the \sigma-meson parameters. Then taken intoaccount the current perturbation value of (\alpha-\beta)_\pi^0=-1.9, we havefound (\alpha-\beta)_\pi^(+-)=9.4--8.2 for values of the \sigma-meson parameterwithin 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 thedecay width of the h_1(1170)- meson into \gamma\pi^0 can be found if thedifference (\alpha-\beta)_\pi^(+-) is reliably determined from the experiment.Estimation of the optimal value of the decay width \sigma->\gamma\gamma hasgiven \Gamma_{\s->\gamma\gamma}<0.7$keV.

Relation between the dipole polarizabilities of charged and neutral pions