# Quark Matter 2017

Feb 5 – 11, 2017
Hyatt Regency Chicago
America/Chicago timezone

## Neutral particle-hadron correlation measurements with the ALICE experiment at the LHC

Feb 7, 2017, 9:30 AM
20m
Regency C

### Regency C

Oral Jets and High pT Hadrons

### Speaker

Astrid Vauthier (Centre National de la Recherche Scientifique (FR))

### Description

Among the probes used to investigate the properties of the Quark-Gluon Plasma, the measurement of the energy loss of high energy partons can be used to put constraints on energy loss models and to ultimately access medium characteristics (such as energy density or temperature). The study of two particle correlations allows to obtain very different constraints compared to the nuclear modification factor. In particular, the correlation of recoiling charged hadrons with high energy $\pi^{0}$ or direct photons is believed to give a measure of the parton energy loss and insights of the medium induced modification of the fragmentation process.

High energy neutral pions and photons are reconstructed using the ALICE electromagnetic calorimeter EMCal and the charged particles are detected by ALICE main tracking detectors ITS and TPC.

In this talk, we will present the measurements of azimuthal $\pi^{0}$-hadron correlations in pp and Pb-Pb collisions along with the extracted per-trigger yield modification factor ($I_{AA}$) as well as comparisons with models. The status of the isolated $\gamma$-hadron correlations and $\pi^{0}$ elliptic flow measurements will also be presented.

Collaboration ALICE Jets and High pT Hadrons

### Primary author

Astrid Vauthier (Centre National de la Recherche Scientifique (FR))