Improving a radiative plus collisional energy loss model for application to RHIC and LHC

Details Improving a radiative plus collisional energy loss model for application to RHIC and LHC Improving a radiative plus collisional energy loss model for application to RHIC and LHC

2007-01-29

arxiv.org/abs/nucl-th/0701088v2

J.Phys.G34:S989-S993,2007

Physics

Nuclear Physics

Nuclear Theory

Prepared for 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions: Quark Matter 2006 (QM2006), Shang

Scientific paper

10.1088/0954-3899/34/8/S141

With the QGP opacity computed perturbatively and with the global entropy constraints imposed by the observed dNch/dy~1000, radiative energy loss alone cannot account for the observed suppression of single non-photonic electrons. Collisional energy loss is comparable in magnitude to radiative loss for both light and heavy jets. Two aspects that significantly affect the collisional energy loss are examined: the role of fluctuations, and the effect of introducing a running QCD coupling as opposed to the fixed alpha_s=0.3 used previously.

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