Jet measurements in heavy ion collisions from the LHC and RHIC have highlighted the necessity of new theoretical tools to understand the dynamics of jets going through a quark-gluon plasma. Some of the new developments in this field are shown here. First, it is shown how multiple gluon branching inside a dense medium can be described by means of a probabilistic picture. Through this set up one can calculate the radiative corrections to momentum broadening and energy loss where it is found that there are potentially large logarithms which need to be accounted for properly. The calculation is then considered in the dilute medium regime where similar corrections are found.
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