Baryon resonances and strong decays

Abstract

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.

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

References in corpus (11)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Unified description of light- and strange-baryon spectra
• Masses of $[70,{\ell }^{+}]$ Baryons in the $1/N_c$ Expansion
• Electromagnetic nucleon form factors in instant and point form
• Hadronic Decays of N and ΔResonances in a Chiral Quark Model
• Spectator-model operators in point-form relativistic quantum mechanics
• Covariant calculation of mesonic baryon decays
• Covariant calculation of nonstrange decays of strange baryon resonances
• Covariant calculation of strange decays of baryon resonances
• Quark model description of hadrons

Cited by in corpus (4)

• Delta-baryon mass in a covariant Faddeev approach
• Structure of meson-baryon interaction vertices
• Low energy reactions $K^{-}p\to {\Sigma }^0{\pi }^0$, $\Lambda {\pi }^0$, ${\bar{K}}^{0}n$ and the strangeness $S=-1$ hyperons
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances