Hard-gluon Evolution of Nucleon Generalized Parton Distributions in Soft-Wall AdS/QCD Model

TL;DR

This paper integrates perturbative QCD evolution into the holographic soft-wall AdS/QCD model to improve the description of nucleon GPDs, showing better agreement with phenomenological data.

Contribution

It introduces a method to incorporate perturbative effects into the holographic GPDs using DGLAP-like evolution equations, enhancing the model's physical accuracy.

Findings

Evolved GPDs show improved agreement with phenomenological models

Combining holographic and perturbative approaches captures key GPD physics

The approach offers a new way to include QCD evolution in holographic models

Abstract

Holographic soft-wall model is successful in the phenomenology of hadrons. Here with the use of generalized parton distributions (GPDs) obtained from AdS/QCD, perturbative effects are entered into the formalism. Perturbations are incorporated in the formalism through the evolution of GPDs according to the DGLAP like equations. Evolved proton GPDs are compared with a phenomenological model to show that we can get good improvements of the holographic model. It seems that combining the holographic soft-wall model with perturbative effects to some extent, gives the correct physics of GPDs.