On the gluon spectrum in the glasma

TL;DR

This paper investigates the gluon distribution in nucleus-nucleus collisions within the Color-Glass-Condensate framework, comparing analytical and numerical solutions of Yang-Mills equations to improve understanding of gluon spectra in the glasma.

Contribution

It demonstrates that numerical solutions can be accurately approximated using Coulomb gauge initial conditions and linearized evolution, and compares kt-factorized approximations to full solutions.

Findings

Numerical solutions are well approximated by Coulomb gauge initial conditions and linear evolution.

kt-factorized approximations are compared to full solutions, assessing their accuracy.

The study enhances understanding of gluon spectra in the early stages of heavy-ion collisions.

Abstract

We study the gluon distribution in nucleus-nucleus collisions in the framework of the Color-Glass-Condensate. Approximate analytical solutions are compared to numerical solutions of the non-linear Yang-Mills equations. We find that the full numerical solution can be well approximated by taking the full initial condition of the fields in Coulomb gauge and using a linearized solution for the time evolution. We also compare kt-factorized approximations to the full solution.