# Quark Matter 2018

May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Initial state physics and approach to equilibrium

### Speaker

Aleksas Mazeliauskas (Universität Heidelberg)

### Description

We develop a macroscopic description of the space-time evolution of the energy momentum tensor during the pre-equilibrium stage of a high-energy heavy-ion collision. Based on a weak coupling effective kinetic description of the microscopic equilibration process (a la bottom-up"), we calculate the non-equilibrium evolution of the local background energy-momentum tensor as well as the non-equilibrium linear response to transverse energy and momentum perturbations for realistic boost-invariant initial conditions for heavy ion collisions. We demonstrate that this framework can be used on an event-by-event basis to propagate the energy momentum tensor from far-from-equilibrium initial state models, e.g. IP-Glasma, to the time $\tau_\text{hydro}$ when the system is well described by relativistic viscous hydrodynamics. We show that with kinetic theory pre-equilibrium, the final hadron multiplicities and radial and elliptic flows become essentially independent of the hydrodynamic initialization time $\tau_\text{hydro}$. The effective kinetic description of the pre-equilibrium evolution can be also used for studying the chemical equilibration of quarks and gluons and the pre-equilibrium photon production.

Content type Theory Presenter name already specified

### Primary authors

Aleksas Mazeliauskas (Universität Heidelberg) Derek Teaney (Stony Brook University) Eero Aleksi Kurkela (CERN) Jean-Francois Paquet (Duke University) Soeren Schlichting (University of Washington)