Energy gain of heavy quarks by fluctuations in the QGP
  The collisional energy gain of a heavy quark due to chromo-electromagnetic field fluctuations in a quark-gluon plasma is investigated. The field fluctuations lead to an energy gain of the quark for all temperatures and velocities. The net effect is a reduction of the collisional energy loss by 15-40% for parameters relevant at RHIC energies. 
Purnendu Chakraborty, Munshi Golam Mustafa, Markus H. Thoma