A systematic study of longitudinal and transverse helicity amplidutes in the hypercentral Constituent Quark Model

Abstract

We report in a systematic way the predictions of the non-relativistic hypercentral Constituent Quark model for the electromagnetic excitations of baryon resonances. The longitudinal and transverse helicity amplitudes are calculated with no free parameters for fourteen resonances, both for proton and neutron. The calculations lead to an overall fair description of data, specially in the medium $Q^2$ range, where quark degrees of freedom are expected to dominate.

arXiv admin note: text overlap with arXiv:1501.03722

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• Electromagnetic Transition Form Factors of Baryon Resonances
• The N(1520) 3/2- helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions
• Using the Single Quark Transition Model to predict nucleon resonance amplitudes
• ${\gamma }^{\ast }N\to N(1710)$ 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
• Transition form factors and helicity amplitudes for electroexcitation of negative- and positive parity nucleon resonances in a light-front quark model
• Extracting meson-baryon contributions to the electroexcitation of the $N(1675){\frac{5}{2}}^{-}$ nucleon resonance
• Photo-absorption on deuteron contributed by d^*(2380) resonance
• Spectrum and Structure of Excited Baryons with CLAS
• Electromagnetic $N-\Delta (1232)$ transitions within the point-form of relativistic quantum mechanics
• Systematic study of longitudinal and transverse helicity amplitudes in the hypercentral Constituent Quark Model
• Helicity amplitudes of $N(1520)$ and $N(1535)$ including pentaquark components