Heavy flavour in nucleus-nucleus collisions at RHIC and LHC: a Langevin approach A. Beraudo, A. De Pace, M. Monteno, F. Prino, W.M. Alberico, A. Molinari and M. Nardi EPJ Web of Conferences, 66 (2014) 04004 Published online: 20 March 2014 DOI: 10.1051/epjconf/20146604004