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

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, without additional free parameters. The gluonic and quark distributions are shown to have significantly different effective QCD scales.

Automated summary

The article discusses the holographic light-front QCD framework, which provides a unified nonperturbative description of hadron mass spectrum, form factors, and quark distributions. It extends holographic QCD to describe gluonic distributions in the proton and pion from the coupling of spin-two Pomeron-induced metric fluctuations with the energy momentum tensor in anti-de Sitter space, while taking into account constraints from the Veneziano model without additional free parameters. The gluonic and quark distributions are shown to have significantly different effective QCD scales.