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Nuclear Theory

arXiv:1512.01538 (nucl-th)
[Submitted on 4 Dec 2015]

Title:Moving forward to constrain the shear viscosity of QCD matter

Authors:Gabriel Denicol, Akihiko Monnai, Bjoern Schenke
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Abstract:We demonstrate that measurements of rapidity differential anisotropic flow in heavy ion collisions can constrain the temperature dependence of the shear viscosity to entropy density ratio {\eta}/s of QCD matter. Comparing results from hydrodynamic calculations with experimental data from RHIC, we find evidence for a small {\eta}/s $\approx$ 0.04 in the QCD cross-over region and a strong temperature dependence in the hadronic phase. A temperature independent {\eta}/s is disfavored by the data. We further show that measurements of the event-by-event flow as a function of rapidity can be used to independently constrain the initial state fluctuations in three dimensions and the temperature dependent transport properties of QCD matter.
Comments: 6 pages, 5 figures
Subjects: Nuclear Theory (nucl-th); High Energy Physics - Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
Cite as: arXiv:1512.01538 [nucl-th]
  (or arXiv:1512.01538v1 [nucl-th] for this version)
  https://doi.org/10.48550/arXiv.1512.01538
Journal reference: Phys. Rev. Lett. 116, 212301 (2016)
Related DOI: https://doi.org/10.1103/PhysRevLett.116.212301

Submission history

From: Björn Schenke [view email]
[v1] Fri, 4 Dec 2015 20:44:45 UTC (152 KB)
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