# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## A Running Coupling Explanation of the Surprisingly Transparency of the QGP at LHC

16 Aug 2012, 15:40
20m
Diplomat ()

### Diplomat

Oral Presentation

### Speaker

Alessandro Buzzatti (Columbia University)

### Description

The CUJET1.0 Monte Carlo Jet Energy loss model is applied to predict the jet flavor, centrality and density dependence of the nuclear modification factor $R_{AA}$ and the elliptic flow $v_2$ at RHIC and LHC. Running coupling effects due to combined $x$, $k_\perp$ and $q_\perp$ evolution are included for the first time in the dynamical DGLV opacity expansion framework and are shown to provide a natural dynamical QCD tomographic solution to the surprising transparency$^1$ of the quark gluon plasma produced at LHC as suggested by $p_T>10$ GeV $R_{AA}$ data from ALICE, ATLAS, and CMS. (Ref: 1: W.H.Horowitz et al, NPA872(2011)265, A.Buzzatti et al, PRL108(2012)022301, B.Betz et al arXiv:1201.0281 [nucl-th])

### Primary author

Alessandro Buzzatti (Columbia University)

### Co-author

Miklos Gyulassy (Columbia University)

### Presentation Materials

 ABuzzatti_QM12.pdf ABuzzatti_QM12.pptx

Paper files: