3-D Glasma initial state for relativistic heavy ion collisions

TL;DR

This paper extends the IP-Glasma model to three dimensions by incorporating small x evolution, enabling detailed predictions of rapidity-dependent gluon distributions and initial state fluctuations in heavy ion collisions.

Contribution

The work introduces a 3D version of the IP-Glasma model with explicit small x evolution, improving initial state modeling for relativistic heavy ion collisions.

Findings

Rapidity distributions of produced gluons computed with the extended model.

Analysis of rapidity correlations and fluctuations of initial geometry.

Comparison with existing 3D initial state models.

Abstract

We extend the impact parameter dependent Glasma model (IP-Glasma) to three dimensions using explicit small x evolution of the two incoming nuclear gluon distributions. We compute rapidity distributions of produced gluons and the early time energy momentum tensor as a function of space-time rapidity and transverse coordinates. We study rapidity correlations and fluctuations of the initial geometry and multiplicity distributions and compare to existing models for the three dimensional initial state.