Covariant calculation of nonstrange decays of strange baryon resonances

Abstract

We report on a study of pi and eta decays of strange baryon resonances within relativistic constituent-quark models based on one-gluon-exchange and Goldstone-boson-exchange dynamics. The investigations are performed in the point form of Poincare-invariant relativistic quantum mechanics with a spectator-model decay operator. The covariant predictions of the constituent-quark models underestimate the experimental data in most cases. These findings are congruent with an earlier study of nonstrange baryon decays in the light-flavor sector. We also consider a nonrelativistic reduction of the point-form spectator model, which leads to the decay operator of the elementary emission model. For some decays the nonrelativistic results differ substantially from the relativistic ones and they exhibit no uniform behavior as they scatter above and below the experimental decay widths.

arXiv comment8 pages, 1 figure, 2 tables

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Cited by in corpus (14)

• Quark-Model Identification of Baryon Ground and Resonant States
• Strong decays of baryons and missing resonances
• Electromagnetic nucleon form factors in instant and point form
• Hadronic decays of mesons and baryons in the Dyson-Schwinger approach
• Structure of meson-baryon interaction vertices
• Point-Form Hamiltonian Dynamics and Applications
• Chiral restoration in excited nucleons versus SU(6)
• Covariant calculation of strange decays of baryon resonances
• Point-form quantum field theory
• Low energy reactions $K^{-}p\to {\Sigma }^0{\pi }^0$, $\Lambda {\pi }^0$, ${\bar{K}}^{0}n$ and the strangeness $S=-1$ hyperons
• Electromagnetic Properties of Few-Body Systems Within a Point-Form Approach
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances
• Baryon resonances and strong decays
• Exploration of hyperfine interaction between constituent quarks via eta productions