# Broken boost invariance in the Glasma via finite nuclei thickness

## TL;DR

This paper simulates the early non-boost-invariant Glasma in heavy ion collisions, revealing deviations from boost invariance and matching experimental data by extending the McLerran-Venugopalan model to finite nucleus thickness.

## Contribution

It introduces a finite nucleus width parameter into the McLerran-Venugopalan model to study non-boost-invariant Glasma evolution.

## Key findings

- Rapidity profile deviations from boost invariance
- Ability to produce broad and narrow energy density profiles
- Surprising agreement with RHIC experimental data

## Abstract

We simulate the creation and evolution of non-boost-invariant Glasma in the early stages of heavy ion collisions within the color glass condensate framework. This is accomplished by extending the McLerran-Venugopalan model to include a parameter for the Lorentz-contracted but finite width of the nucleus in the beam direction. We determine the rapidity profile of the Glasma energy density, which shows deviations from the boost-invariant result. Varying the parameters both broad and narrow profiles can be produced. We compare our results to experimental data from RHIC and find surprising agreement.