# Physics at LHC 2012

4-9 June 2012
Life Sciences Centre, UBC
<strong><font color="#cc0000">Abstract submission has closed</font></strong>

## Particle correlation results from the ALICE experiment at LHC

5 Jun 2012, 14:50
20m
LSC-3 (Life Sciences Centre, UBC)

### LSC-3

#### Life Sciences Centre, UBC

University of British Columbia Vancouver, BC Canada
Parallel Talk Heavy Ion Physics

### Speaker

Dong Jo Kim (University of Jyvaskyla (FI))

### Description

In-medium modification of jet fragmentation functions in heavy ion collisions is thought to be a direct manifest of the parton energy loss in the medium. Despite the large energy loss signaled by the large imbalance of jet transverse energies in di-jet events[1] and by the suppression of large transverse momentum hadrons [2], it has been found that jet fragmentation functions in Pb-Pb collisions are very similar to the ones measured in p-p collisions[3]. The ALICE experiment has utilized particle correlations to address modification of jet properties in Pb-Pb collisions compared with p-p collisions at the LHC. Furthermore, particle correlations were used to separate particles associated with the jet and those produced with the bulk, as well as to study number and transverse momentum correlation functions in heavy ion collisions. These might help to quantify medium modifications of the parton shower and the response of the surrounding medium. In this talk, we present the latest results on $\Delta\phi$, $\Delta\eta$ and $\Delta\p_{T}$ correlations as well as jet-fragmentation transverse momentum distribution as a function of centrality and transverse momentum. Identified particle ratios of particles associated with the jet and those from the bulk will be discussed. [1] Phys. Rev. Lett. 105 (2010) 252303. [2] Phys. Lett. B696, 30-39 (2011). [3] CMS-PAS-HIN-11-004.

### <strong>Collaboration Name</strong><br /><font color="#000099">Please enter the name of<br />the collaboration or group<br />using the acronym, as in:<br /><font color="#ff0000">ABC Collaboration</font>

ALICE Collaboration