# Quark Matter 2018

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

## Towards first-principle hydrodynamics for heavy-ion collision phenomenology

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Collective dynamics

### Speaker

Andrea Dubla (GSI)

### Description

Heavy-ion collisions are well described by a dynamical evolution with a long hydro-dynamical phase. In this phase the properties of the strongly correlated quark-gluon plasma are reflected in the equation of state (EoS) and the transport coefficients, most prominently by the shear and bulk viscosities over entropy density ratio $\eta$/s(T) and $\zeta$/s(T), respectively.
While the EoS is by now known to a high accuracy, the transport coefficients and in particular their temperature and density dependence are not known from first-principle computations yet. To remedy this situation we deploy a complementary QCD based approaches to compute $\eta$/s(T) using functional renormalization group to compute gluon real-time spectral functions [1]. In addition we will show the work and progresses of a novel lattice simulation prescription in non-compact imaginary time [2,3], in which the conventional analytic continuation problem is significantly improved.
In this work, these most recent QCD-based parameters are provided as input to the MUSIC framework [4]. The IP-Glasma model is used to describe the initial energy density distribution, and UrQMD the late hadronic phase. Simulations are performed for Pb-Pb collisions at $\sqrt{\rm s_{NN}}$ = 2.76 TeV, for different centrality intervals. The resulting kinematic distributions of the particles produced in the collisions are compared to data from the LHC, for several experimental observables. The high precision of the experimental results and the broad variety of observables considered allow to critically verify the quality of the description based on first-principle input to the hydro-dynamic evolution.

[1] N. Christiansen et.al. PRL 115 (2015) 112002
[2] J. M. Pawlowski and A. Rothkopf arXiv:1610.09531,
[3] J.M. Pawlowski, A. Rothkopf, F.Ziegler (in preparation)
[4] Sangwook Ryu, et al., https://arxiv.org/abs/1704.04216

Content type Theory ISOQUANT Presenter name already specified

### Primary authors

Andrea Dubla (GSI) Alexander Rothkopf (Heidelberg University) Silvia Masciocchi (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) Johanna Stachel (Ruprecht Karls Universitaet Heidelberg (DE)) Jan M. Pawlowski (University of Heidelberg) Felix Ziegler (University of Heidelberg)

### Co-authors

Bjoern Schenke (Brookhaven National Lab) Raju Venugopalan (Brookhaven National Laboratory) Chun Shen (Brookhaven National Laboratory)