Naturalness of the Coleman-Glashow Mass Relation in the 1/N_c Expansion:   an Update
  A new measurement of the Xi^0 mass verifies the accuracy of the Coleman-Glashow relation at the level predicted by the 1/N_c expansion. Values for other baryon isospin mass splittings are updated, and continue to agree with the 1/N_c hierarchy. 
Elizabeth Jenkins and Richard F. Lebed