MODERN PHYSICS LETTERS A, vol.6, no.25, pp.2327-2334, 1991 (SCI-Expanded)
Axial form-factor of the radiative decay of charged pion is calculated using QCD sum rules method for non-diagonal correlator. For the ratio gamma = F(A)(0)/F(V)(0) we find gamma = 0.6 +/- 0.15.