Phenomenology of the hadronic structure at small-$x$

TL;DR

This paper explores the internal gluon structure of protons at small-x using two different theoretical frameworks, aiming to enhance understanding of gluon dynamics and proton tomography at future colliders.

Contribution

It compares transverse-momentum dependent gluon densities and unintegrated gluon distributions, providing insights into gluon behavior in the small-x regime.

Findings

Insights into gluon motion inside protons at small-x

Comparison of CSS and BFKL formalisms for gluon densities

Foundational work for proton tomography at new colliders

Abstract

We present exploratory studies of the proton structure via two distinct kinds of gluon densities: the transverse-momentum dependent functions, whose evolution is determined by the CSS equation, and the unintegrated gluon distribution, whose definition is given in the BFKL formalism. Our analyses are relevant for the exploration of the intrinsic motion of gluons inside protons in the small-$x$ regime, and for a comprehensive tomographic imaging of the proton at new-generation colliding facilities.