Hyperfine effects in charmed baryons

Hadron masses are calculated in quenched lattice QCD with a fermion action of the D234 type on an anisotropic lattice. Hyperfine splittings for singly charmed baryons are found to be in agreement with expectations from the qu ark model and with a magnitude slightly larger than experimental values. Ma sses of doubly charmed baryons are also calculated and compared to a variet y of model calculations. Hyperfine splittings in doubly charmed baryons are found to be slightly smaller than in singly charmed states. (C) 2000 Publi shed by Elsevier Science B.V. All rights reserved.