Gauge-invariant effective fields in QCD and the strong charge screening

摘要

Gauge-invariant fields in hadrons are defined through the Wilson loop and written in terms of gauge-invariant field correlators. Dynamical equations for fields are considered. It is shown that at small distances in the leading order α_s, aproximation they correspond to Maxwell equations with electric current and reproduce in particular the color-Coulombic OGE potential. At larger distances nonabelian triple field correlators lead to the emergence of circular effective (white) magnetic currents, and screening of the electric charge arises.