Proton gluonic distributions in a light front spectator model

TL;DR

This paper develops a light-front spectator model for proton gluonic distributions, utilizing AdS/QCD wave functions and NNPDF data, to predict gluon TMDs, GPDs, and spin contributions.

Contribution

It introduces a novel light-front spectator model for gluon distributions in the proton based on AdS/QCD and experimental data.

Findings

Model successfully predicts gluon TMDs and GPDs.

Provides estimates for gluon spin and orbital angular momentum contributions.

Aligns model predictions with existing experimental and lattice data.

Abstract

We investigate the leading-twist gluonic distribution functions within the proton by formulating a light-front spectator model. The proton light-front wave functions (LFWFs) are adopted from the soft-wall AdS/QCD predictions, and the model parameters are determined using the gluon unpolarized parton distribution function from the NNPDF3.0nlo dataset. Furthermore, we demonstrated the model calculations for gluon transverse momentum distributions (TMDs) and generalized parton distributions (GPDs). We also predicted the gluon spin and orbital angular momentum (OAM) contributions to the total proton spin.