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arXiv · hep-ph/0003167

Large N_c, Constituent Quarks, and N, Delta Charge Radii

Alfons J. Buchmann·Richard F. Lebed
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Abstract

We show how one may define baryon constituent quarks in a rigorous manner, given physical assumptions that hold in the large-N_c limit of QCD. This constituent picture gives rise to an operator expansion that has been used to study large-N_c baryon observables; here we apply it to the case of charge radii of the N and Delta states, using minimal dynamical assumptions. For example, one finds the relation r_p^2 - r_{Delta^+}^2 = r_n^2 - r_{Delta^0}^2 to be broken only by three-body, O(1/N_c^2) effects for any N_c.

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Alfons J. Buchmann, Richard F. Lebed. 2000-07-26. Large N_c, Constituent Quarks, and N, Delta Charge Radii. https://doi.org/10.1103/physrevd.62.096005

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