Effects of a spin-flavour dependent interaction on light-flavoured baryon helicity amplitudes

Abstract

This paper is a continuation of previous work about the effects of a phenomenological flavour dependent force in a relativistically covariant constituent quark model based on the Salpeter equation on the structure of light-flavoured baryon resonances. Here the longitudinal and transverse helicity amplitudes as studied experimentally in the electro-excitation of nucleon- and $\Delta$ resonances are calculated. In particular the amplitudes for the excitation of three and four star resonances as calculated in a previous model $\mathcal{A}$ are compared to those of the novel model $\mathcal{C}$ as well as to existing and partially new experimental data such as e.g. determined by the CB-ELSA collaboration. A brief discussion of some improvements to model $\mathcal{C}$ is given after the introduction.

21 pages, 58 figures

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Cited by in corpus (13)

• New Results from the Studies of the $N(1440)1/2^{+}$, $N(1520)3/2^{-}$, and $\Delta (1620)1/2^{-}$ Resonances in Exclusive $ep\to e^{\prime }{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction with the CLAS Detector
• Electromagnetic Transition Form Factors of Baryon Resonances
• Valence quark and meson cloud contributions to the ${\gamma }^{\ast }N\to N^{\ast }(1520)$ form factors
• Studies of N^* structure from the CLAS meson electroproduction data
• Using the Single Quark Transition Model to predict nucleon resonance amplitudes
• A chiral quark model for meson electro-production in the region of D-wave resonances
• ${\gamma }^{\ast }N\to N(1710)$ transition at high momentum transfer
• Semirelativistic approximation to the ${\gamma }^{\ast }N\to N(1520)$ and ${\gamma }^{\ast }N\to N(1535)$ transition form factors
• Recent results on the nucleon resonance spectrum and structure from the CLAS detector
• Improved empirical parametrizations of the ${\gamma }^{\ast }N\to \Delta (1232)$ and ${\gamma }^{\ast }N\to N(1520)$ helicity amplitudes and the Siegert's theorem
• Baryon transition form factors at the pole
• About the magnitude of the ${\gamma }^{\ast }N\to N(1520)$ transverse amplitudes near $Q^2=0$
• A Relativistic Model for the Electromagnetic Structure of Baryons from the 3rd Resonance Region