Heavy baryon masses in the 1/mQ and 1/Nc expansions.

Abstract

The masses of baryons containing a single heavy quark are studied in a combined expansion in 1/{ital m}{sub {ital Q}}, 1/{ital N}{sub {ital 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}{sub {ital c}}{sup {asterisk}}, {Xi}{sub {ital c}}{sup {prime}}, and {Omega}{sub {ital c}}{sup {asterisk}} are predicted to the level of a few MeV. A number of bottom baryon mass splittings are predicted very accurately. {copyright} {ital 1996 The American Physical Society.}