  Two classes of jet correlations in hot and dense matter are explored.
Correlations between very high transverse momentum hadrons within a jet sample
the gluon density of the medium, where, the minimal modification on the same
side as the trigger is consistent with the picture and parameters of partonic
energy loss. Lower momentum partons, sampled through softer correlations, due
to their larger wavelengths are sensitive to the presence of composite
structures in the medium. Scattering off such states may modify the dispersion
relation of the radiated gluons resulting in conical patterns in the detected
correlations.
