# 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!

## Two-particle transverse momentum correlations in Pb-Pb collisions at ALICE

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

### First floor and third floor

#### Palazzo del Casinò

Poster Correlations and fluctuations

### Speaker

Mr Victor Gonzalez (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))

### Description

Two-particle correlations are powerful tools for studying the medium produced in heavy-ion collisions. In particular, two-particle transverse momentum correlations enable measurements of features of the collision dynamics sensitive to momentum currents. Their evolution with collision centrality, i.e. system life time, provides information about shear viscosity, $\eta$/s, and about system relaxation time, $\tau_{\pi}$. We report on measurements of two-particle transverse momentum correlations in nine centrality intervals from Pb-Pb collisions taken at the LHC with the ALICE detector. The shape of the correlation function is then parametrized once the flow components are suppressed. The collision centrality dependence of the near side peak of the correlation function, most particularly its longitudinal width, provides information about the shear viscosity of the produced medium. Suggested theoretical interpretations are then mapped against the obtained data.

Content type Experiment ALICE Presenter name already specified

### Primary author

Mr Victor Gonzalez (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))