New Relations for Excited Baryons in Large N_c QCD

Abstract

We show that excited baryons in large N_c QCD form multiplets, within which masses are first split at O(1/N_c). The dominant couplings of resonances to various mesons are highly constrained: The N(1535) decays at leading 1/N_c order exclusively to eta-N rather than pi-N, and vice versa for the N(1650). This multiplet structure is reproduced by a simple large N_c quark model, well studied in the literature, that describes resonances as single-quark excitations.

4 pages, no figures, ReVTeX 4. Includes new discussion of previous work on excited baryon towers

References in corpus (2)

• 1/Nc corrections to the SU(4)_c symmetry for L=1 baryons: The Three Towers
• Excited Baryons in Large N_c QCD Revisited: The Resonance Picture Versus Single-Quark Excitations

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