Gauge invariant Field Strength Correlators in QCD
  Gauge invariant correlators in QCD are studied on the lattice.A Systematic determination of the correlation lengths for gluon field strength correlators and quark correlators is made.The measurement of the gluon and quark condensates is discussed. 
A.Di Giacomo, M.D'Elia, H.Panagopoulos, E.Meggiolaro