Comparison of radiative energy loss models in a hot QCD medium
Abstract
The suppression of high hadron production in heavy ion collisions is thought to be due to energy loss by gluon radiation off hard partons in a QCD medium. Existing models of QCD radiative energy loss in a color-charged medium give estimates of the coupling strength of the parton to the medium which differ by a factor of . We will present a side-by-side comparison of two different formalisms to calculate the energy loss of light quarks and gluons: the multiple soft scattering approximation (ASW-MS) and the opacity expansion formalism (ASW-SH and WHDG-rad). A common time-temperature profile is used to characterize the medium. The results are compared to the single hadron suppression at RHIC energies. In addition the influcence of homogeneous and non-homogeneous distribution of scattering centers is discussed. We find that using an equivalent brick overestimates the energy loss for long parton trajectories.
Keywords
Cite
@article{arxiv.1012.0728,
title = {Comparison of radiative energy loss models in a hot QCD medium},
author = {Marta Verweij},
journal= {arXiv preprint arXiv:1012.0728},
year = {2015}
}
Comments
Proceedings Hard Probes 2010, October 10-15, Eilat (Israel)