Spin-dependent potentials in SU(3) lattice gauge theory

The tensor, spin-spin, and spin-orbit terms in the heavy-quark potential have been calculated, via Monte Carlo methods in SU(3) lattice gauge theory on a 6/sup 3/ x 12 lattice, at ..beta.. = 6,7,8,9,10. The signs and dependence on quark separation of all terms are generally consistent with one-gluon exchange. There is some evidence for nonperturbative behavior in the spin-orbit and spin-spin potentials at ..beta.. = 6.0. .AE