Speaker
Barbara Betz
(Frankfurt University)
Description
Recent data on the azimuthal and transverse momentum dependence of high-pT pion nuclear modification factors and high-pT elliptic flow in nuclear collisions at RHIC and LHC are analyzed in terms of a generic dE/dx model that interpolates between running coupling pQCD-based models such as CUJET2.0 and AdS/CFT-inspired holographic models. The jet-energy loss models are coupled to state of the art viscous hydrodynamic fields. RHIC data are found to be surprisingly consistent with most dE/dx+Hydro models, but extrapolations to LHC energies favor running coupling QCD-based energy-loss models, while conformal holography models are inconsistent with the data. It is also shown that energy-loss fluctuations appear to play a crucial role in the underprediction of high-pT elliptic flow as seen by various pQCD-based energy-loss approximations.
Primary author
Barbara Betz
(Frankfurt University)
Co-author
Miklos Gyulassy
(Columbia University)
