Can we see from jet quenching that quark-gluon plasma becomes more perturbative at the LHC than at the RHIC?

We perform a joint jet tomographic analysis of the PHENIX RHIC and ALICE LHC data on the nuclear modification factor R_AA within the light-cone path integral approach to induced gluon emission. Our results show that variation of R_AA from RHIC to LHC energies indicates that the QCD coupling constant is suppressed in the quark-gluon plasma produced at the LHC.