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Jet-quenching in a 3D hydrodynamic medium

Thorsten Renk·Joerg Ruppert·Chiho Nonaka·Steffen A. Bass
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Abstract

We study the radiative energy loss of hard partons in a soft medium in the multiple soft scattering approximation. The soft medium is described by a 3D hydrodynamical model and we treat the averaging over all possible parton paths through the medium without 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. We study the angular dependence of $R_{AA}$ for different centralities, discuss the influence of hydrodynamical expansion and flow and comment on the comparison with preliminary data.

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Thorsten Renk, Joerg Ruppert, Chiho Nonaka, Steffen A. Bass. 2007-02-02. Jet-quenching in a 3D hydrodynamic medium. https://doi.org/10.1103/physrevc.75.031902

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