Perturbation theory in the nonperturbative QCD vacuum

Abstract

Perturbative expansion in the nonperturbative confining QCD background is formulated. The properly renormalized ${\alpha }_S(R)$ is shown to be finite at large distances, with the string tension playing the role of an infrared regulator. The infra--red renormalons are shown to be absent in the new perturbation series.

Comments: 38 pages, preprint HD-THEP-93-16