Orbitally Excited Baryon Spectroscopy in the 1/Nc Expansion

Details Orbitally Excited Baryon Spectroscopy in the 1/Nc Expansion Orbitally Excited Baryon Spectroscopy in the 1/Nc Expansion

2002-04-04

arxiv.org/abs/hep-ph/0204044v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages. Invited talk at The Phenomenology of Large Nc QCD, Tempe, Arizona, 9-11 Jan 2002

Scientific paper

The discussion of the 70-plet of negative parity baryons illustrates the large Nc QCD approach to orbitally excited baryons. In the case of the l=1 baryons the existing data allows to make numerous predictions to first order in the SU(3) symmetry breaking. New relations between splittings are found that follow from the spin-flavor symmetry breaking. The Lambda(1405) is well described as a three-quark state and a spin-orbit partner of the Lambda(1520). Singlet states with higher orbital angular momentum are briefly discussed.

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