Light-and Strange-Baryon Spectra in a Relativistic Potential Model

ABSTRACT

Light- and strange-baryon spectra are studied in a relativistic potential model of independent quarks taking into account perturbatively the correction due to one-gluon-exchange interaction along with that due to Goldstone boson exchange interaction between the constituent quarks and that due to center-of-mass motion. The baryons are assumed here as an assembly of independent quarks confined in a first approximation by an effective linear potential which presumably represents the non-perturbative multigluon interactions including the gluon self-couplings. The model yields the ground states and excitation spectra of baryons in close agreement with experiment and also explains the correct level ordering of positive-and negative-parity excitations in the N, Δ and Δ spectra. The model also reproduces the mass spectra for some of the other four and three star resonances of the particle data group.