Two-point correlation functions of QCD in the Landau gauge

Understand

We investigate the gluon, ghost and quark propagators in the Landau gauge with dynamic quarks.

• We perform a one-loop calculation in a model where the standard Faddeev-Popov Lagrangian is complemented by a mass term for the gluons which is seen as a minimal way of taking into account the effect of the Gribov copies.
• The analytic results are compared with lattice data obtained in four dimension and for two, three and four quark flavors.
• The gluon and ghost propagators are reproduced with a few percent accuracy in the whole range of accessible momenta.