Gluon radiation by heavy quarks at intermediate energies and   consequences for the mass hierarchy of energy loss
  We extend the Gunion Bertsch calculation of gluon radiation in single scattering to the case of finite mass quarks. This case applies to the radiative energy-loss of heavy quarks of intermediate energies propagating in a quark gluon plasma. We discuss more specifically the dead cone effect as well as the mass hierarchy of the collisional and radiative energy loss and provide some predictions for observables sensitive to the mass hierarchy of energy loss in ultrarelativistic heavy ion collisions. 
Pol Bernard Gossiaux, Joerg Aichelin, Thierry Gousset, Marlene   Nahrgang, Vitalii Ozvenchuk, Klaus Werner
hep-ph hep-ex