Gluon matter distribution in the proton and pion from extended holographic light-front QCD

TL;DR

This paper extends holographic light-front QCD to describe gluon distributions in the proton and pion, revealing distinct effective QCD scales for gluons and quarks without introducing new free parameters.

Contribution

It introduces a novel extension of holographic QCD to include gluonic distributions via metric fluctuations and Pomeron coupling, with no extra free parameters.

Findings

Gluonic and quark distributions have significantly different effective QCD scales.

The model successfully describes gluon distributions in hadrons.

No additional free parameters are needed for the extension.

Abstract

The holographic light-front QCD framework provides a unified nonperturbative description of the hadron mass spectrum, form factors and quark distributions. In this article we extend holographic QCD in order to describe the gluonic distribution in both the proton and pion from the coupling of the metric fluctuations induced by the spin-two Pomeron with the energy momentum tensor in anti--de Sitter space, together with constraints imposed by the Veneziano model{\color{blue},} without additional free parameters. The gluonic and quark distributions are shown to have significantly different effective QCD scales.