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 language||English (US)|
|Number of pages||7|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Nov 1 2000|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)