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Estimating $$\eta/s$$ of QCD matter at high baryon densities

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Abstract

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 $$\eta/s$$ decreases from 0.2 to 0.08 when collision energy grows from $$\sqrt{s_{\rm NN}}\approx7$$ to 39 GeV.

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Single-particle distribution in the hydrodynamic and statistical thermodynamic models of multiparticle production

(1974)
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Author and article information

Journal
1509.07351
10.1088/1742-6596/668/1/012063

High energy & Particle physics, Nuclear physics