Diquark masses from lattice QCD - art. no. 111502

We present the first results for diquark correlation functions calculated i n the Landau gauge on the lattice. Masses have been extracted from the long distance behavior of these correlation functions. We find that the orderin g of the diquark masses with spin 0 and 1 states in color anti-triplet and sextet channels is in accordance with instanton motivated interaction model s. Although we find evidence for an attractive interaction in color anti-tr iplet states with a splitting between spin 0 and spin 1 diquarks that can a ccount for the mass splitting between the nucleon and the delta, there is n o evidence for a deeply bound diquark state. [S0556-2821(98)50421-3].