Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-04-19
Phys.Lett.B606:303-312,2005
Physics
Nuclear Physics
Nuclear Theory
Discussion of the different approximations to 3+1D plasma expansion and their impact on the energy loss calculation is added.
Scientific paper
10.1016/j.physletb.2004.12.013
The final state energy loss of fast partons penetrating a longitudinally expanding quark-gluon plasma of effective gluon rapidity density $dN^{g}/dy=650-800$ is evaluated and incorporated together with the multiple initial state Cronin scattering in the lowest order perturbative QCD hadron production formalism. Predictions for the neutral pion attenuation in central $Au+Au$ collisions at the intermediate RHIC energy of $\sqrt{s_{NN}}=62$ GeV relative to the binary collision scaled $p+p$ result are given. The quenching is found to be a factor of 2-3 with a moderate transverse momentum dependence and the attenuation of the away-side di-hadron correlation function is estimated to be 3-5 fold.
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