# Perturbative high-energy evolution in the IP-Glasma initial state

## TL;DR

This paper integrates perturbative JIMWLK energy evolution into the IP-Glasma model to improve initial state descriptions in heavy ion collision simulations, enabling predictions across different collider energies.

## Contribution

It introduces a numerical solution of the JIMWLK equation into the IP-Glasma framework for the first time, enhancing the modeling of energy-dependent initial conditions.

## Key findings

- Energy-dependent nuclear structure obtained from JIMWLK evolution.
- Improved predictions of observables from RHIC to LHC energies.
- Enhanced initial state modeling for heavy ion collisions.

## Abstract

We include the perturbative JIMWLK energy evolution into the IP-Glasma initial state description used to simulate the early-time dynamics in heavy ion collisions. By numerically solving the JIMWLK equation on an event-by-event basis, we obtain the energy (Bjorken-$x$) dependent structure of the colliding nuclei. Combining the initial state with hydrodynamic simulations, this enables us to predict how observables evolve when moving from RHIC to LHC energies.