How large is the gluon polarization in the statistical parton distributions approach?

TL;DR

This paper reviews the quantum statistical approach to parton distributions and demonstrates that recent experimental data suggest a large gluon polarization significantly contributing to the proton spin.

Contribution

It introduces a new determination of parton distributions within the statistical approach, highlighting the large gluon polarization effect.

Findings

Large gluon polarization contributes significantly to proton spin

Improved data description with the statistical approach

Recent experimental results support the new distribution model

Abstract

We review the theoretical foundations of the quantum statistical approach to parton distributions and we show that by using some recent experimental results from Deep Inelastic Scattering, we are able to improve the description of the data by means of a new determination of the parton distributions. We will see that a large gluon polarization emerges, giving a significant contribution to the proton spin.