# Quark Matter 2017

5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

## Initial conditions for hydrodynamics from weakly coupled pre-equilibrium evolution

7 Feb 2017, 11:00
20m
Regency A

### Regency A

Oral Initial State Physics and Approach to Equilibrium

### Speaker

Aleksas Mazeliauskas

### Description

We use effective kinetic theory to simulate equilibration in heavy-ion collisions. We construct a map for out-of-equilibrium initial state to the energy-momentum tensor at a time when hydrodynamics becomes applicable. We apply this map to IPGlasma initial conditions and demonstrate a smooth transition to hydrodynamics. In a phenomenologically favorable range of $\eta/s$ values, equilibration can be well approximated by a fixed function of a scaled time variable $(\tau T)/(\eta/s)$. This scalable kinetic equilibration can be readily applied to other initial state models to provide perturbatively controlled description of pre-equilibrium energy and transverse momentum flow evolution.

References:

JHEP 1608 (2016) 171 [hep-ph/1605.04287]

Phys.Rev.Lett. 115 (2015) 18 [hep-ph/1506.06647]

Preferred Track Initial State Physics and Approach to Equilibrium Not applicable

### Co-authors

Jean-Francois Paquet (Stony Brook University) Soeren Schlichting (University of Washington)