Quadrupole moments of N and Δ in the 1/N c expansion

Alfons J. Buchmann, Janice A. Hester, Richard Lebed

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


We calculate expressions for the quadrupole moments of nonstrange baryons in which the number of QCD color charges is N c. Using only the assumption of single-photon exchange, we obtain 4 relations among the 6 moments, and show how all of them may be obtained from Q Δ+p up to O(1/N c 2) corrections. We compare to the N c=3 case, and obtain relations between the neutron charge radius and quadrupole moments. We also discuss prospects for the measurement of these moments.

Original languageEnglish (US)
Article number056002
JournalPhysical Review D
Issue number5
StatePublished - 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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