Generalized Parton Distributions and Description of Electromagnetic and Graviton form factors of nucleon

TL;DR

This paper introduces a new parameterization of generalized parton distributions that effectively models nucleon electromagnetic form factors and explores gravitational form factors and charge densities.

Contribution

It proposes a novel t-dependence parameterization for GPDs that accurately reproduces nucleon form factors across momentum transfers.

Findings

The parameterization fits proton and neutron form factors well.

Results show compatibility between Rosenbluth and polarization data methods.

Quark contributions to gravitational form factors are quantified.

Abstract

The new parameterization of the generalized parton distributions t-dependence is proposed. It allows one to reproduce sufficiently well the electromagnetic form factors of the proton and neutron at small and large momentum transfer. The description of the data obtained by the Rosenbluth method and the polarization method are compared. The results obtained by the latter method are shown to be compatible with the correspondent neutron data. The impact parameter dependence of the neutron charge density is examined. The quark contributions to gravitational form factors of the nucleons are obtained.