“…Let the momenta, corresponding to the currents η(x) and j(x) be p and q. As was shown in [5,6], the imaginary part of the forward scattering amplitude is determined by small distances in t-channel if p 2 and q 2 are negative and large enough, | p 2 |, | q 2 |≫ R −2 , (R is the confinement radius) and the Bjorken scaling variable x = Q 2 /2ν, Q 2 = −q 2 , ν = p · q is not close to the boundary values x = 0 and x = 1. Therefore, to calculate the amplitude of interest we may use the operator product expansion (OPE) method accounting the vacuum expectation values (v.e.v.)…”