Field strength correlators in QCD at zero and non-zero temperature

Abstract

We study, by numerical simulations on a lattice, the behaviour of the gauge--invariant field strength correlators in QCD both at zero temperature, down to a distance of 0.1 fm, and at finite temperature, across the deconfinement phase transition.Comment: Talk given at the ``High Energy Conference on Quantum Chromodynamics'', Montpellier (France), 4-12 July 1996 (QCD 96); 5 pages, LaTeX file, uses ``espcrc2.sty''+ 5 PS figure