Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-01-10
Phys.Rev.C66:014908,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages with figs
Scientific paper
10.1103/PhysRevC.66.014908
The dependence of the radiative energy loss of fast partons on the initial thermodynamic parameters is studied for deconfined matter to be expected at RHIC. We demonstrate that the specific QCD radiation pattern with a quadratic dependence of the energy loss on the propagated distance leads to a strong increase of the energy loss with increasing initial entropy of deconfined matter supposed its life-time is less than the average time to pass through the medium. This is in contrast to a parameterization with constant energy loss per unit length of propagation. For a sufficiently high initial temperature a two-regime behavior of the energy loss as a function of the initial parton momentum occurs. The angular structure of the energy loss of hard jets with respect to the initial temperature is also discussed for RHIC conditions.
Gallmeister Kai
Kampfer Burkhard
Pavlenko O. P.
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