Nonperturbative evaluation of a field correlator appearing in the heavy quarkonium system
arXiv:hep-ph/9609233 · doi:10.1016/S0370-2693(96)01297-X
Abstract
Recently an electric and magnetic field correlator appearing in the description of the heavy quarkonium system was evaluated on the lattice. Here, we give a nonperturbative analytical evaluation of this field correlator using a dual description of long distance Yang--Mills theory and using the stochastic vacuum model. The two predictions are both compatible with lattice data but show a different dependence on the quark separation. We discuss the analytic results in relation to the lattice data.
13 pages, Latex--Elsevier document class 'elsart'