  We investigate the three-point correlation functions of Yang-Mills theory in
the Landau gauge, with a particular emphasis on the infrared regime. The effect
of the Gribov copies is accounted for by adding a mass term for the gluons in
the Faddeev-Popov action in the Landau gauge. We perform a one-loop calculation
for the ghost-antighost-gluon and three-gluon correlation functions. These
analytic results are compared with the available lattice data and give a very
satisfying agreement.
