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Volume 345 - International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (HardProbes2018) - Novel Theoretical & Experimental Developments
Heavy flavour energy loss from AdS/CFT in heavy ion collisions at RHIC and LHC
R. Hambrock,* W.A. Horowitz
*corresponding author
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Pre-published on: 2019 January 11
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We present predictions for heavy flavour suppression, flow, and azimuthal correlations in heavy ion collisions at RHIC and LHC of two AdS/CFT based energy loss models sensitive to thermal fluctuations. While both models are in good agreement with B-meson suppression measurements from the LHC, only the model with a diffusion coefficent independent of the heavy quark's velocity is in agreement with measurements of D-meson suppression at high pT.

The partonic azimuthal correlations are compared with those from perturbative QCD based simulations up to $20\text{GeV}$. When restricted to leading order production processes, we find that the strongly coupled correlations of high transverse momentum pairs ($>4\text{GeV}$) are broadened less efficiently than the corresponding weak coupling based correlations, while low transverse momentum pairs ($1-4\text{GeV}$) are broadened with similar efficiency, but with an order of magnitude more particles ending up in this momentum class.

We thus propose heavy flavour momentum correlations as a distinguishing observable of weakly- and strongly-coupled energy loss mechanisms.
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