Abstract:
We analyze the contribution of perturbative QCD based semihard parton (re)scattering to the reaction dynamics of relativistic heavy-ion collisions at SPS and RHIC. While such processes are able to account for the measured yield of high-momentum direct photons at SPS energies, the conditions necessary for jet quenching are not fulfilled. The situation changes dramatically at RHIC energies. © 2002 The American Physical Society.
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