Electromagnetic proton form factors in dual large-$N_c$ QCD: an update

TL;DR

This paper updates the determination of proton electromagnetic form factors using a dual large-$N_c$ QCD model, achieving excellent agreement with experimental data up to high momentum transfers.

Contribution

It provides an improved dual-model approach to calculate proton form factors, aligning well with experimental measurements in the space-like region.

Findings

Excellent agreement with data up to $q^2 \,\simeq -30 \,GeV^2$

Accurate prediction of the ratio $\,\mu_P G_E(q^2)/G_M(q^2)$ up to $q^2 \simeq -8.5 \,GeV^2$

Validates the dual large-$N_c$ QCD framework for proton structure analysis.

Abstract

An updated determination is presented of the electric and magnetic form factors of the proton, in the framework of a dual-model realization of QCD in the limit of an infinite number of colors. Very good agreement with data is obtained in the space-like region up to $ q^2 \simeq - \,30 \,{GeV}^2$. In particular, the ratio $\mu_P \, G_E(q^2) / G_M(q^2)$ is predicted in very good agreement with recoil polarization measurements from Jefferson Lab, up to $q^2 \simeq - 8.5 \,{GeV}^2$. \end{abstract}