Abstract
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 αs = 0.3 used previously.
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