Collisional vs. Radiative Energy Loss of Heavy Quark in a Hot and Dense   Nuclear Matter
  We study the heavy quark evolution in a quark-gluon plasma medium within the framework of Langevin equation coupled to a (2+1)-dimensional viscous hydrodynamic model. We modify the current Langevin algorithm such that apart from quasi-elastic scattering, medium-induced radiative energy loss is incorporated as well by treating gluon radiation as an extra force term. We find a significant effect of gluon radiation on heavy quark energy loss at LHC energies. Our calculation provides a good description of the D meson suppression measured by ALICE experiment, and makes a prediction for B meson suppression and flow. 
Shanshan Cao, Guang-You Qin, Steffen A. Bass and Berndt M\"uller
nucl-th hep-ph nucl-ex