# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Study of jet fragmentation with particle correlations in Pb-Pb collision at 2.76 TeV by ALICE

Aug 15, 2012, 11:20 AM
20m

Oral Presentation

### Speaker

Filip Krizek (Helsinki Institute of Physics (FI))

### Description

A high-$p_{T}$ jet suppression first observed at RHIC has been reported also at the LHC. The ALICE collaboration has recently reported an observation of an enhanced intra-jet yield of charged particles associated with the high-\pt{} trigger particle ($I_{\rm AA}$) in central \pbpb\ collisions at \snn=2.76 \tev\ which may be also interpreted as a hint of the modification of the fragmentation function due to induced gluon radiation. In order to study further the nature of the intra-jet correlation yield enhancement an analysis of the jet-fragmentation transverse momentum was performed. Modification of this distribution with the centrality of the collision will be presented. A possible path length dependency of the induced radiation is studied using a comparison of the two-particle correlation for different orientations of the trigger particle with respect to the event plane and comparing the jet-fragmentation transverse momentum distribution measured in different event-by-event anisotropy classes.

### Primary author

Collaboration ALICE (CERN, Geneva, Switzerland)

### Co-author

Filip Krizek (Helsinki Institute of Physics (FI))

 Slides

Paper files: