Abstract
High p T particles probe the medium created in nucleus-nucleus collisions. The high p T partons will suffer jet quenching in the medium before it hadronizes. The number of high p T partons is proportional to the number of hard scatterings in the collision. Indirect measurement of the energy loss (relative to the number of hard scatterings) of the partons can be studied in the nuclear modification factor, R AA . Studying the R AA as a function of collision energy, rapidity and system size will constrain models that try to describe these collisions. Here we will present nuclear modification factors from Au-Au and Cu-Cu collisions at s NN = 62.4 GeV and compare these with Au-Au collisions at s NN = 200 GeV .
Published Version
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