  We study the modifications of jets created in heavy-ion collisions at LHC
energies. The inherent hierarchy of scales governing the jet evolution allows
to distinguish a leading jet structure, which interacts coherently with the
medium as a single color charge, from softer sub-structures that will be
sensitive to effects of color decoherence. We argue how this separation comes
about and show that this picture is consistent with experimental data on
reconstructed jets at the LHC, providing a quantitative description
simultaneously of the jet nuclear modification factor, the missing energy in
di-jet events and the modification of the fragmentation functions. In
particular, we demonstrate that effects due to color decoherence are manifest
in the excess of soft particles measured in fragmentation functions in Pb-Pb
compared to proton-proton collisions.
