# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
Europe/Zurich timezone

## Jet and charged hadron nuclear modification factors in pPb and PbPb collisions with CMS

20 May 2014, 09:20
20m

### titanium

Contributed Talk Jets

### Speaker

Eric Andrew Appelt (Vanderbilt University (US))

### Description

One of the signatures of the strongly interacting medium produced in central PbPb collisions is the suppression of high-$p_{\rm T}$ jets and charged particles. In order to to disentangle the initial state and final state effects in heavy ion collisions, the nuclear modification factor of both jets and of charged-particles in pPb ($R_{\rm pPb}$) and PbPb ($R_{\rm PbPb}$) collisions are presented. The spectra of both jets and charged-particles in pp collisions at $\sqrt{s} = 2.76$, PbPb collisions at $\sqrt{s_{NN}} = 2.76$ TeV, and pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV, have been measured with the CMS detector using high statistics samples. The $R_{\rm pPb}$ of charged particles is determined by dividing the measured pPb spectrum by a pp reference spectrum constructed using interpolation methods, or alternatively from PYTHIA simulations.
On behalf of collaboration: CMS

### Primary author

Eric Andrew Appelt (Vanderbilt University (US))

 Slides