The masses of baryons containing a single heavy quark are studied in a combined expansion in $\frac{1}{m_Q}$, $\frac{1}{N_c}$, and SU(3) flavor symmetry breaking. Heavy quark baryon mass splittings are related to mass splittings of the octet and decuplet baryons. The ${\Sigma }_c^{*}$, ${\Xi }_c^{\prime }$, and ${\Omega }_c^{*}$ are predicted to the level of a few MeV. A number of bottom baryon mass splittings are predicted very accurately.

• Received 1 April 1996

DOI:https://doi.org/10.1103/PhysRevD.54.4515