The dual parametrization for gluon GPDs

TL;DR

This paper explores a dual parametrization approach for gluon GPDs in nucleons, enhancing modeling flexibility and providing a method to extract gluon spin contributions from experimental data.

Contribution

It generalizes the Abel transform tomography method for gluons and advocates for dual parametrization-based fitting strategies to analyze GPDs.

Findings

Provides a flexible modeling framework for gluon GPDs.

Generalizes Abel transform tomography for gluons.

Suggests dual parametrization fitting strategies for experimental data.

Abstract

We consider the application of the dual parametrization for the case of gluon GPDs in the nucleon. This provides opportunities for the more flexible modeling unpolarized gluon GPDs in a nucleon which in particular contain the invaluable information on the fraction of nucleon spin carried by gluons. We perform the generalization of Abel transform tomography approach for the case of gluons. We also discuss the skewness effect in the framework of the dual parametrization. We strongly suggest to employ the fitting strategies based on the dual parametrization to extract the information on GPDs from the experimental data.