  We compare the jet-path length and beam-energy dependence of the pion nuclear
modification factor and a parton-jet nuclear modification factor at RHIC and
LHC. We contrast predictions based on a linear pQCD and a highly non-linear
hybrid-AdS holographic model of jet-energy loss. We find that both models
require a reduction of the jet-medium coupling from RHIC to LHC to account for
the measured pion nuclear modification factor. In case of the parton-jet
nuclear modification factor, however, which serves as a lower bound for the LO
jet nuclear modification factor of reconstructed jets, the extracted data can
be characterized without a reduced jet-medium coupling at LHC energies. We
conclude that while reconstructed jets are sensitive to both quarks and gluons
and thus provide more information than the pion nuclear modification factor,
their information regarding the jet-medium coupling is limited due to the
superimposition with NLO and medium effects. Hence, a detailed description of
the underlying physics requires both the leading hadron and the reconstructed
jet nuclear modification factor. Unfortunately, the results for both the pion
and the parton-jet nuclear modification factor are insensitive to the jet-path
dependence of the models considered.
