Nucleon electromagnetic form factors and electroexcitation of low lying nucleon resonances in a light-front relativistic quark model

TL;DR

This paper uses a light-front relativistic quark model to predict electroexcitation amplitudes of nucleon resonances up to high momentum transfer, integrating quark core and pion-cloud effects.

Contribution

It introduces a model combining 3-quark core and pion-cloud contributions within light-front dynamics to predict nucleon resonance electroexcitation amplitudes.

Findings

Predicted amplitudes up to Q2=12 GeV2 for several nucleon resonances.

Parameterization based on nucleon electromagnetic form factors.

Model successfully incorporates both quark core and pion-cloud effects.

Abstract

We utilize a light-front relativistic quark model (LF RQM) to predict the 3q core contribution to the electroexcitation amplitudes for the Delta(1232)P33, N(1440)P11, N(1520)D13, and N(1535)S11 up to Q2= 12GeV2. The parameters of the model have been specified via description of the nucleon electromagnetic form factors in the approach that combines 3q and pion-cloud contributions in the LF dynamics.