Abstract
Previous studies of nonstrange baryons are extended to resonances of mass beyond 2 GeV, belonging to the N = 4 band. The framework is a semi-relativistic constituent quark model. The quark-quark interaction contains a Coulomb plus linear confinement term and a short-range spin-spin term. It turns out that the string tension value of 1 GeV fm−1 fixed previously in the N ≤ 3 bands is compatible with the N = 4 band. It is shown that the three-body confinement potential plays an important role in describing the inner structure of the band. The decay widths are calculated in a flux-tube breaking mechanism and compared to data and other models.
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