Transition form factors and helicity amplitudes for electroexcitation of negative- and positive parity nucleon resonances in a light-front quark model

Abstract

A workable basis of quark configurations $s^3$, $s^{2}p$ and $s{p}^2$ at light front has been constructed to describe the high-$Q^2$ behavior of transition form factors and helicity amplitudes in the electroproduction of the lightest nucleon resonances, $N_{1/2^{-}}(1535)$ and $N_{1/2^{+}}(1440)$. High-quality data of the CLAS Collaboration are described in the framework of a model which takes into account mixing of the quark configurations and the hadron-molecular states. The model allows for a rough estimate of the quark core weight in the wave function of the resonance in a comparison with high momentum transfer data on resonance electroproduction.

18 pages

References in corpus (16)

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Cited by in corpus (6)

• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Electromagnetic Transition Form Factors of Baryon Resonances
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• $\gamma N\to N^{\ast }(1535)$ transition in soft-wall AdS/QCD
• Global Data-Driven Determination of Baryon Transition Form Factors
• Helicity amplitudes of $N(1520)$ and $N(1535)$ including pentaquark components