Scaling of PDFs, TMDs, and GPDs in soft-wall AdS/QCD

Abstract

We explicitly demonstrate how to correctly define the hadronic parton distributions (PDFs, TMDs, and GPDs) in the soft-wall AdS/QCD approach, based on the use of a quadratic dilaton field, providing confinement and spontaneous breaking of conformal and chiral symmetries. The power behavior of parton distributions at large values of the light-cone variable is consistent with quark counting rules and Drell-Yan-West duality. All parton distributions are defined in terms of profile functions, which depend on the light-cone coordinate and are fixed from PDFs and electromagnetic form factors.

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• New findings in gluon TMD physics
• TMD Relations: Insights from a Light-Front Quark-Diquark Model
• Heavy quark contribution to the electromagnetic properties of the nucleon
• Predictions for the Sivers Single-Spin Asymmetry from Holographic QCD
• Exploring Nucleon Structure and the Proton Mass Problem through Holographic QCD
• Relations between generalized parton distributions and transverse momentum dependent parton distributions