Orbitally Excited Baryons in Large N_c QCD

Details Orbitally Excited Baryons in Large N_c QCD Orbitally Excited Baryons in Large N_c QCD

1999-07-19

arxiv.org/abs/hep-ph/9907412v1

Nucl.Phys. A663 (2000) 687-690

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages LaTeX. Invited parallel session talk presented at the XVth Particles and Nuclei International Conference (PANIC99), Ju

Scientific paper

10.1016/S0375-9474(99)00722-8

We present a model-independent analysis of the mass spectrum of nonstrange l=1 baryons in large N_c QCD. The 1/N_c expansion is used to select and order a basis of effective operators that spans the nine observables (seven masses and two mixing angles). Comparison to the data provides support for the validity of the 1/N_c expansion, but also reveals that only a few nontrivial operators are strongly preferred. We show that our results have a consistent interpretation in a constituent quark model with pseudoscalar meson exchange interactions.

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