High leading hadron suppression in nuclear collisions at 20-200 GeV: data versus parton energy loss models
Columbia University, Irvington, Nevis Laboratories, NY 10027, NY 10533, and New York, USA
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Experimental results on high transverse momentum (leading) hadron spectra in nucleus-nucleus collisions in the range 20-200 GeV are reviewed with an emphasis on the observed suppression compared to free space production in proton-proton collisions at the corresponding center-of-mass energies. The transverse-momentum and collision-energy (but seemingly not the in-medium path length) dependence of the experimental suppression factors measured in central collisions is consistent with the expectations of final-state non-Abelian parton energy loss in a dense QCD medium.
© Springer-Verlag, 2005