Baryon resonances and strong decays

Details Baryon resonances and strong decays Baryon resonances and strong decays

2007-11-06

arxiv.org/abs/0711.0881v1

Eur.Phys.J.A35:329-331,2008

Physics

Nuclear Physics

Nuclear Theory

Talk presented at NSTAR 2007, 5 - 8 September 2007, Bonn, Germany

Scientific paper

10.1140/epja/i2007-10556-5

Constituent quark models provide a reasonable description of the baryon mass spectra. However, even in the light- and strange-flavor sectors several intriguing shortcomings remain. Especially with regard to strong decays of baryon resonances no consistent picture has so far emerged, and the existing experimental data cannot be explained in a satisfactory manner. Recently first covariant calculations with modern constituent quark models have become available for all pi, eta, and K decay modes of the low-lying light and strange baryons. They generally produced a remarkable underestimation of the experimental data for partial decay widths. We summarize the main results and discuss their impact on the classification of baryon resonances into flavor multiplets. These findings are of particular relevance for future efforts in the experimental investigation of baryon resonances.

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