  We present first results for diquark correlation functions calculated in
Landau gauge on the lattice. Masses have been extracted from the long distance
behaviour of these correlation functions. We find that the ordering of diquark
masses with spin 0 and 1 states in colour anti-triplet and sextet channels is
in accordance with instanton motivated interaction models. Although we find
evidence for an attractive interaction in colour anti-triplet states with a
splitting between spin 0 and spin 1 diquarks that can account for the mass
splitting between the nucleon and the delta, there is no evidence for a deeply
bound diquark state.
