The Nuclear Modification Factor at Large Rapidities
Abstract
RHIC data on high-pT hadron production display strong suppression in a wide rapidity region, indicating strong induced energy loss for both transversally and longitudinally traveling partons. We investigate the interplay of energy loss and rapidity dependence in a perturbative QCD improved parton model, and estimate the opacity of the produced hot matter in AuAu collisions at energies s=200 AGeV and 63 AGeV at different rapidity values. Direction-dependent suppression offers the possibility to study the geometry of the hot matter.
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