Large-N-c baryons

A spin-flavor symmetry emerges for baryons in the large-N-c limit. Large-N- c baryons form irreducible representations of the spin-flavor algebra, and their static properties can be computed in a systematic expansion in 1/N-c. Symmetry relations for static baryon matrix elements are obtained at vario us orders in the 1/N-c expansion by neglecting subleading 1/N-c corrections . Equivalent relations arise in the quark and Skyrme models, which satisfy the same large-N-c group theory as quantum chromodynamics (QCD). The 1/N-c expansion yields useful results for QCD baryons with N-c = 3.