Baryon mass splittings in the 1/Nc expansion

Elizabeth Jenkins, Richard F. Lebed

Research output: Contribution to journalArticlepeer-review

147 Scopus citations


The I=0,1,2,3 mass splittings of the spin-1/2 octet and spin-3/2 decuplet baryons are analyzed in the 1/Nc expansion combined with perturbative flavor breaking. We show there is considerable experimental evidence that the baryon masses satisfy the hierarchy predicted by this expansion. Since flavor symmetry-breaking suppression factors alone are not sufficient to describe the observed hierarchy, we conclude that there is firm evidence for the 1/Nc expansion in the baryon masses. Our analysis differs from nonrelativistic SU(6).

Original languageEnglish (US)
Pages (from-to)282-294
Number of pages13
JournalPhysical Review D
Issue number1
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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