The structure of nucleons and the description of the electromagnetic form factors

TL;DR

This paper compares various PDF structure functions with experimental data on nucleon electromagnetic form factors using a GPD-based model, revealing significant differences in their descriptive accuracy.

Contribution

It introduces a model of t-dependence of GPDs and analyzes how different PDFs impact the description of nucleon form factors.

Findings

Different PDFs show large differences in describing electromagnetic form factors.

The GPD model effectively relates inelastic processes to form factors.

Significant discrepancies exist despite similar inelastic process descriptions.

Abstract

The comparison of different sets of PDFs structure functions with the description of the whole sets of experimental data of electromagnetic form factors of the proton and neutron is made in the frame work of our model of t-dependence of generalized parton distributions (GPDs) and some other models. It is shown that despite a small difference of the description of the inelastic processes by the different sets of PDF there is an essentially large difference in the description of electromagnetic form factors of the nucleons.