Small x Gluons in Nuclei and Hadrons

TL;DR

This paper investigates how high gluon densities at small x influence gluon distributions in hadrons and nuclei, revealing significant suppression effects at energies relevant for RHIC and LHC.

Contribution

It introduces a new Wilson renormalization group-based evolution equation that incorporates n to 1 gluon ladder fusion effects.

Findings

Significant reduction in nuclear gluon distribution at small x for large nuclei.

The evolution equation accounts for gluon ladder fusion effects.

Results are relevant for high-energy collider experiments.

Abstract

We numerically study the effects of high gluon density at small x on the evolution of gluon distribution function in both hadrons and nuclei. Using a newly derived, Wilson renormalization group-based evolution equation which includes n to 1 gluon ladder fusion, we find significant reduction in nuclear gluon distribution function for large nuclei at zero impact parameter at energies relevant for RHIC and LHC experiments.