Energy loss of leading partons in a thermal QCD medium

We consider bremsstrahlung energy toss for hard partons traversing a quark-gluon plasma (QCP). Accounting correctly for the probabilistic nature of the energy loss, and making a leading-order-accurate treatment of bremsstrahlung, we find that the suppression of the spectrum is nearly flat, with the most suppression at energies E similar to 30T (where T is the QGP temperature), without the need for initial state effects such as shadowing and the Cronin effect. This flat pattern should also be observed at the. LHC (Large Hadron Collider) out to an energy of similar to 30 GeV.