Hard and soft probe - medium interactions in a 3D hydro+micro approach at RHIC

Details Hard and soft probe - medium interactions in a 3D hydro+micro approach at RHIC Hard and soft probe - medium interactions in a 3D hydro+micro approach at RHIC

2007-02-26

arxiv.org/abs/nucl-th/0702079v1

J.Phys.G34:S979-984,2007

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures, Quark Matter 2006 proceedings, to appear in Journal of Physics G

Scientific paper

10.1088/0954-3899/34/8/S139

We utilize a 3D hybrid hydro+micro model for a comprehensive and consistent description of soft and hard particle production in ultra-relativistic heavy-ion collisions at RHIC. In the soft sector we focus on the dynamics of (multi-)strange baryons, where a clear strangeness dependence of their collision rates and freeze-out is observed. In the hard sector we study the radiative energy loss of hard partons in a soft medium in the multiple soft scattering approximation. While the nuclear suppression factor $R_{AA}$ does not reflect the high quality of the medium description (except in a reduced systematic uncertainty in extracting the quenching power of the medium), the hydrodynamical model also allows to study different centralities and in particular the angular variation of $R_{AA}$ with respect to the reaction plane, allowing for a controlled variation of the in-medium path-length.

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