Electroproduction of Nucleon Resonances in a Relativistic Quark Model

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Abstract
A relativistic version of the symmetric quark model is used to calculate the inelastic electron-proton scattering amplitudes in the resonance region. Including all the nucleon states of the harmonic-oscillator baryon spectrum, we find good agreement with the three prominent peaks in the cross section. The part of the cross section coming from longitudinally polarized virtual photons is small, as recently observed in the resonance region.