Abstract
A theory of a non-Abelian gauge field is considered on the basis of an effective Lagrangian that possesses the property of asymptotic freedom. In this theory, the confinement-deconfinement phase transition has a nontrivial scenario according to which the two phases may exist in the same spacetime region. In the low-momentum region |p2| < Λ QCD 2 , we have a confining regime in the presence of a gluon condensate, while, in the high-momentum region |p2| ≫ Λ QCD 2 , perturbative QCD holds. An iterative scheme for refining parameters of the effective Lagrangian is outlined.
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