Large Nc, constituent quarks, and N, Δ charge radii

Alfons J. Buchmann, Richard F. Lebed

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


We show how one may define baryon constituent quarks in a rigorous manner, given physical assumptions that hold in the large-Nc limit of QCD. This constituent picture gives rise to an operator expansion that has been used to study large-Nc baryon observables; here we apply it to the case of charge radii of the N and Δ states, using minimal dynamical assumptions. For example, one finds the relation rp2-rΔ+2=rn 2-rΔ02 to be broken only by three-body, O(1/Nc2) effects for any Nc.

Original languageEnglish (US)
Article number096005
Pages (from-to)1-7
Number of pages7
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number9
StatePublished - Nov 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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