Competition of heavy quark radiative and collisional energy loss in deconfined matter

We extend our recently advanced model on collisional energy loss of heavy quarks in a quark gluon plasma by including radiative energy loss. We discuss the approach and present first preliminary results, including a comparison of the role of both types of energy loss for experimental data. We draw the conclusion that the present nuclear modification factor R-AA data on non-photonic single electrons do not permit us to 'select' between these two types of energy-loss mechanisms.