%0 Journal Article
%T Nonperturbative Power Corrections in $\bar¦Á_s(q^2)$ of Two-Loop Analytization Procedure
%A Aleksey I. Alekseev
%J Physics
%D 1999
%I arXiv
%X The analytization procedure which allows one to remove nonphysical singularities of the QCD running coupling constant $\bar\alpha_s(q^2)$ in the infrared region is applied to standard as well as to iterative solutions of the two-loop renormalization group equation. Non-leading at large momentum nonperturbative contributions in $\bar\alpha_s(q^2)$ are obtained in an explicit form. The coefficients of nonperturbative contributions expansions in inverse powers of the squared Euclidean momentum are calculated. For both cases considered there appear convergent at $q^2>\Lambda^2$ power series of negative terms with different dependence on term numbers.
%U http://arxiv.org/abs/hep-ph/9906304v1