  We show that the correlation functions of ghosts and gluons for the pure
Yang-Mills theory in Landau gauge can be accurately reproduced for all momenta
by a one-loop calculation. The key point is to use a massive extension of the
Faddeev-Popov action. The agreement with lattice simulation is excellent in
d=4. The one-loop calculation also reproduces all the characteristic features
of the lattice simulations in d=3 and naturally explains the pecularities of
the propagators in d=2.
