Medium effects and jet fragmentation at the LHC

In this work we study the production of charged hadrons in ultrarelativistic heavy ion collisions. We quantify the medium effects by calculating the nuclear ratio RAA as a function of the transverse momentum of the produced hadron. The main ingredients are the shadowing of the nuclear parton distributions, the jet energy loss and the fragmentation functions modified by the hot and dense medium. Our results are focused on the interplay of the different effects, and results are compared with recent LHC data.