Large N_c Limit of Spin-Flavor Breaking in Excited Baryon Levels

Details Large N_c Limit of Spin-Flavor Breaking in Excited Baryon Levels Large N_c Limit of Spin-Flavor Breaking in Excited Baryon Levels

1996-12-04

arxiv.org/abs/hep-ph/9612252v2

Phys.Lett.B414:140-148,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, one table, Latex file; title changed, some omitted operators have been included and corrections to the results have

Scientific paper

10.1016/S0370-2693(97)01154-4

Spin-flavor symmetry breaking in the levels of excited Baryons are studied to leading order in the 1/$N_c$ expansion. This breaking occurs at zeroth order. For non-strange Baryons with a single quark excited, it is shown that to first order of perturbation theory the breaking is given by one 1-body operator (spin-orbit), and three 2-body operators, all involving the orbital angular momentum of the excited quark. Higher-body operators can be reduced to that set of operators. As illustration, p-wave Baryons are briefly discussed.

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