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The Nuclear Modification Factor at Large Rapidities

G. G. Barnafoldi, P. Levai, G. Papp, G. Fai

hep-pharXiv:hep-ph/0511190

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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