Detailed study of parton energy loss via measurement of fractional momentum loss of high $p_T$ hadrons in heavy ion collisions

Abstract

PHENIX measurement of the fractional momentum loss ($d{p}_T/p_T$) of high $p_T$ identified hadrons are presented. The $d{p}_T/p_T$ of high $p_T$ pizero which are computed from 39GeV Au+Au over to 2.76TeV Pb+Pb are found to vary by a factor of six. We plotted the $d{p}_T/p_T$ against several global variables, $N_{part}$, $N_{qp}$ and $dN/deta$, and found global features. It was found that 200GeV Au+Au points are merging into the central 2.76TeV Pb+Pb points when plotting $d{p}_T/p_T$ against $dN/deta$.

Comments: 6 pages, 7 figure, proceedings for 10th International Workshop on High-pT Physics at RHIC/LHC era, held in Nantes, France, on Sep 9-12, 2014