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Estimating $η/s$ of QCD matter at high baryon densities

We report on the application of a cascade + viscous hydro + cascade model for heavy ion collisions in the RHIC Beam Energy Scan range, $\sqrt{s_{\rm NN}}=6.3\dots200$ GeV. By constraining model parameters to reproduce the data we find that the effective(average) value of the shear viscosity over entropy density ratio $η/s$ decreases from 0.2 to 0.08 when collision energy grows from $\sqrt{s_{\rm NN}}\approx7$ to 39 GeV.

preprint2015arXivOpen access
Iu. KarpenkoM. BleicherP. HuovinenH. Petersen
hep-phnucl-th
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Open access4 authors2 topics
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Iu. KarpenkoM. BleicherP. HuovinenH. Petersen

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