Higher-loop gluon and ghost propagators in Landau gauge from numerical   stochastic perturbation theory
  We present higher loop results for the gluon and ghost propagator in Landau gauge on the lattice calculated in numerical stochastic perturbation theory. We make predictions for the perturbative content of those propagators as function of the lattice momenta for finite lattices. To find out their nonperturbative contributions, the logarithmic definition of the gauge fields and the corresponding Faddeev-Popov operator have to be implemented in the Monte Carlo simulations. 
F. Di Renzo, E.-M. Ilgenfritz, H. Perlt, A. Schiller, C. Torrero