Generalized Parton Distributions: confining potential effects within AdS/QCD

TL;DR

This paper explores how different confining potentials in AdS/QCD models affect the predictions of Generalized Parton Distributions, aiming to connect holographic approaches with phenomenological data.

Contribution

It introduces a comprehensive analysis of confining potentials in AdS/QCD and extends GPD predictions across all kinematic ranges using Double-Distributions.

Findings

Confining potentials significantly influence GPD shapes.

Inclusion of higher Fock states improves phenomenological relevance.

Extended GPD predictions cover the full off-forward kinematic range.

Abstract

Generalized Parton Distributions are investigated within a holographic approach where the string modes in the fifth dimension describe the nucleon in a bottom-up or AdS/QCD framework. The aim is to bring the AdS/QCD results in the realm of phenomenology in order to extract consequences and previsions. Two main aspects are studied: i) the role of the confining potential needed for breaking conformal invariance and introducing confinement (both: classic Soft-Wall and recent Infra-Red potentials are investigated); ii) the extension of the predicted GPDs to the entire range of off-forward kinematics by means of Double-Distributions. Higher Fock states are included describing the nucleon as a superposition of three valence quarks and quark-antiquark pairs and gluons.