Jet Tomography in the Forward Direction at RHIC
نویسنده
چکیده
Hadron production at high-pT displays a strong suppression pattern in a wide rapidity region in heavy ion collisions at RHIC energies. This finding indicates the presence of strong final state effects for both transversally and longitudinally traveling partons, namely induced energy loss. We have developed a perturbative QCD based model to describe hadron production in pp collision, which can be combined with the Glauber –Gribov model to describe hadron production in heavy ion collisions. Investigating AuAu and CuCu collisions at energy √ s = 200 AGeV at mid-rapidity, we find the opacity of the strongly interacting hot matter to be proportional to the participant nucleon number. Considering forward rapidities, the suppression pattern indicates the formation of a longitudinally contracted dense deconfined zone in central heavy ion collisions. We determine parameters for the initial geometry from the existing data. PACS. 12.38.Mh Quark-gluon plasma in quantum chromodynamics – 24.85+p Quarks, gluons, and QCD in nuclei and nuclear processes – 25.75-q Relativistic heavy ion collisions
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