  Two-particle correlations obtained from parton showers that pass the hot and
dense medium of the quark gluon plasma (QGP) can be used as an alternative
observable, in addition to the combination of the nuclear modification factor
$R_{AA}$ and the elliptic flow $v_2$, to study the mechanisms of in-medium
heavy quark energy-loss. In particular, angular correlations represent a
promising tool to distinguish between energy loss due to collisional and
radiative interactions of jet and medium particles. To this end, parton
cascades were created in Monte-Carlo simulations, where individual particles
can undergo both parton splitting as well as an effective jet-medium
interaction. A first model simulates the effects of induced radiations on
parton cascades. Its consequences on angular correlations of partons within
jets were studied in detail, with particular focus on angular broadening. The
results can be compared to a second model that effectively describes elastic
scatterings of jet and medium particles.
