Quark Matter 2017

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

Using Event Shape Engineering to investigate the Chiral Magnetic Effect in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV

Feb 7, 2017, 2:00 PM
20m
Regency B

Regency B

Oral Collective Dynamics

Speaker

Alexandru Florin Dobrin (CERN)

Description

Strong fluctuations of the elliptic flow in heavy ion collisions allow an efficient selection of the events corresponding to a specific initial geometry. This technique, Event Shape Engineering, was applied to select events corresponding to the
same centrality, but having very different values of elliptic flow. For those events, we present results on the centrality dependence of the charge-dependent two- and three-particle correlators in Pb-Pb collisions at
$\sqrt{s_{\rm NN}} = 2.76$ TeV recorded by the ALICE detector. The charge dependence of the three-particle
correlator is often employed as evidence for the Chiral Magnetic Effect (CME). The interpretation of the
experimental results is complicated by possible background contributions, including the modulation from elliptic flow.
We have used these measurements and a Monte-Carlo Glauber simulation of the magnetic field to derive an upper limit on
the CME contribution.

Preferred Track Collective Dynamics ALICE