Nucleon resonances in AdS/QCD

TL;DR

This paper models the electroproduction of the N(1440) Roper resonance using soft-wall AdS/QCD, emphasizing the dominant role of the three-quark component and achieving results consistent with experimental data.

Contribution

It introduces a novel AdS/QCD approach that includes higher Fock states to accurately describe the Roper resonance's electroproduction properties.

Findings

Form factors and helicity amplitudes match experimental data.

The three-quark component dominates the resonance's structure.

Results align well with CLAS Collaboration measurements.

Abstract

We describe the electroproduction of the N(1440) Roper resonance in soft-wall AdS/QCD. The Roper resonance is identified as the first radially excited state of the nucleon, where higher-Fock states in addition to the three-quark component are included. The main conclusion is that the leading 3q component plays the dominant role in the description of electroproduction properties of this resonance: form factors, helicity amplitudes and charge densities. The obtained results are in good agreement with the recent results of the CLAS Collaboration at JLab.