ON THE BEHAVIOR OF DYNAMIC QUARK-ANTIQUARK PAIRS IN EXTERNAL CHROMOELECTRIC FIELDS

The vacuum structure of QCD in an external chromo-electric field is in vestigated within the continuum space-time formulation of perturbative QCD and the extended Nambu-Jona-Lasinio model, used as a low-energy a pproximation of QCD. We show that the density of dynamical quark-antiq uark pairs decreases with increasing external chromoelectric field str ength. These results are compared with recent numerical simulations of lattice QCD which indicate restoration of chiral symmetry in the vici nity of a static color source.