IP-Glasma Phenomenology Beyond 2D

TL;DR

This paper extends the IP-Glasma initial state model from 2+1D boost-invariant to 3+1D, incorporating rapidity evolution and local enforcement of Gauss' law, to better describe non-boost-invariant heavy-ion collision systems.

Contribution

It introduces a 3+1D formulation of the IP-Glasma model with JIMWLK evolution, enabling realistic modeling of non-boost-invariant initial conditions in heavy-ion collisions.

Findings

Comparison of field evolution in 3+1D and 2+1D models.

Analysis of pressure anisotropies over time.

Demonstration of local Gauss' law enforcement in 3+1D.

Abstract

We present a novel formulation of the IP-Glasma initial state model in 3+1D in which the 2+1D boost invariant IP-Glasma is generalized through JIMWLK rapidity evolution of the pre-collision Wilson lines \cite{Schenke:2016ksl}. In order to consistently accommodate a non-boost-invariant system, the initial conditions are generalized to 3+1D. By breaking boost invariance, the 3+1D model no longer trivially satisfies Gauss' law at the initial time, and we now enforce it locally. We compare the time evolution of the chromo-electric and chromo-magnetic fields as well as the transverse and longitudinal pressures in the 3+1D case with the boost invariant result.