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QCD INSTANTON EFFECTS IN HIGH-ENERGY PROCESSES A. E. Dorokhov, I. O. Cherednikov The nonperturbative effects in the processes involving strongly interacting particles are systematically studied within the instanton liquid model (ILM)
of the QCD vacuum. The detailed analysis of the nonperturbative contributions to the electromagnetic quark form factor is presented.
We consider the structure of the instanton induced effects in the evolution equation describing the high-energy behaviour of the form factor and demonstrate
that the instanton contributions result in the finite renormalization of the subleading perturbative result and numerically are characterized by small
factor reflecting the diluteness of the QCD vacuum. |