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The charge pion polarizability is calculated in the Nambu-Jona-Lasinio model,where the quark loops (in the mean field approximation) and the meson loops (inthe $1/N_c$ approximation) are taken into account. We show that quark loopcontribution dominates, because the meson loops strongly conceal each other.The sigma-pole contribution $(m^2_\sigma-t)^{-1}$ plays the main role andcontains strong t-dependence of the effective pion polarizability at the region$|t|\geq 4M_\pi^2$. Possibilities of experimental test of this sigma-poleeffect in the reaction of Coulomb Nuclear Scattering are estimated for theCOMPASS experiment.

Pion Polarizability in the NJL model and Possibilities of its Experimental Studies in Coulomb Nuclear Scattering