Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-13
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures. Talk given at 6th International Workshop on High-pT physics at LHC, 4-7 April 2011, Utrecht, Netherlands
Scientific paper
We examine the significance of $2 \rightarrow 2$ partonic collisions as the suppression mechanism of high-energy partons in the strongly interacting medium formed in ultrarelativistic heavy ion collisions. For this purpose, we have developed a Monte Carlo simulation describing the interactions of perturbatively produced, non-eikonally propagating high-energy partons with the quarks and gluons from the expanding QCD medium. The partonic collision rates are computed in leading-order perturbative QCD (pQCD), while three different hydrodynamical scenarios are used to model the medium. We compare our results with the 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 data and the effect of the initial state fluctuations small.
Auvinen Jussi
Eskola Kari. J.
Holopainen Hannu
Renk Thorsten
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