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Recent data on the high-pT pion nuclear modication factor, RAA(pT ), and its elliptic azimuthal asymmetry, v2(pT ), from RHIC/BNL and LHC/CERN are analyzed in terms of a wide class of jet-energy loss models coupled to dierent (2+1)d transverse plus Bjorken expanding hydrodynamicelds. We test the consistency of each model by demand- ing a simultaneous account of the azimuthal, the transverse momentum, and the centrality dependence of the data at both 0.2 and 2.76 ATeV energies. Wend a rather broad class of jet-energy independent energy-loss models dE=dx = (T )x z T 2+zq that, when coupled to bulk constrained temperatureelds T (x;t), can account for the current data at the  2 =d:o:f: < 2 level with dierent temperature-dependent jet-medium couplings, (T ), and path-length dependence exponents 0 z 2. We extend previous studies by including a generic term, 0 < q < 2 +q, to test dierent scenarios of energy-loss uctuations. While a previously proposed AdS/CFT jet-energy loss model with a temperature-independent jet-medium coupling as well as a near-Tc dominated, pQCD-inspired energy-loss scenario are shown to be inconsistent with the LHC data, once the parameters are constrained by tting to RHIC results, wend several new solutions with a temperature-dependent (T ). We conclude that the current level of statistical and systematic uncertainties of the mea- sured data does not allow a constraint on the path-length exponent z to a range narrower than (0 2).

Erratum: Constraints on the path-length dependence of jet quenching in nuclear collisions at RHIC and LHC