Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-21
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures. Talk given at Quark Matter 2011 conference, 23-28 May 2011, Annecy, France
Scientific paper
We have developed a Monte Carlo simulation describing the $2 \rightarrow 2$ scatterings of perturbatively produced, non-eikonally propagating high-energy partons with the quarks and gluons of the expanding QCD medium created in ultrarelativistic heavy ion collisions. The partonic scattering rates are computed in leading-order perturbative QCD (pQCD), while three different hydrodynamical scenarios are used to model the strongly interacting medium. We compare our results and tune the model with the neutral pion suppression observed in $\sqrt{s_{NN}}=200$ GeV Au+Au collisions at the BNL-RHIC. We find the incoherent nature of elastic energy loss incompatible with the measured angular dependence of the suppression. The effects of the initial state density fluctuations of the bulk medium are found to be small. Also the extrapolation from RHIC to the LHC is discussed.
Auvinen Jussi
Eskola Kari. J.
Holopainen Hannu
Renk Thorsten
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