2001/10/31 by Bernard Metsch, Ulrich Loering
Physics and Astronomy · #hep-ph
published as PiN Newslett. 16 (2002) 225-231 · 6 pages postscript including 4 figures, Proceedings of "9th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon" (MENU 2001), Washington, DC, USA, 26-31 July, 2001
arxiv created 2001/10/31 · arxiv updated 2009/11/30
On the basis of the three-particle Bethe-Salpeter equation we formulated a relativistic quark model for baryons. Assuming the propagators to be given by their free form with constituent quark masses and the interaction kernel by an instantaneous potential, which contains a string-like parameterization of confinement and a flavor dependent interaction motivated by instanton effects we can account for the major features in the baryon spectrum, such as the low position of the Roper resonance and the occurrence of approximate parity doublets apparent in the Nucleon- and Lambda-spectra.