Charmed baryons in lattice QCD - art. no. 094509

Masses of singly and doubly charmed baryons are calculated in quenched latt ice QCD using an improved action of the D234 type on an anisotropic lattice . The mass differences between spin 3/2 and spin 1/2 baryon states are calc ulated and compared with mass differences between vector and pseudoscalar m esons. The suppression of spin splittings in mesons containing heavy quarks . characteristic of quenched QCD simulations, is not observed in the baryon sector. The mass dependence of color hyperfine effects is discussed within the context of the quark model and heavy quark effective theory.