Azimuthal jet tomography at RHIC and LHC

20 May 2014, 12:10
20m
titanium (darmstadtium)

titanium

darmstadtium

Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk Jets Jets

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)

Presentation Materials