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• W3036753718 abstract "We investigate the temperature dependence of the shear viscosity to entropy density ratio $ensuremath{eta}/s$ using a piecewise linear parametrization. To determine the optimal values of the parameters and the associated uncertainties, we perform a global Bayesian model-to-data comparison on $mathrm{Au}+mathrm{Au}$ collisions at $sqrt{{s}_{mathrm{NN}}}=200$ GeV and $mathrm{Pb}+mathrm{Pb}$ collisions at 2.76 TeV and 5.02 TeV, using a $2+1mathrm{D}$ hydrodynamical model with the Eskola-Kajantie-Ruuskanen-Tuominen (EKRT) initial state. We provide three new parametrizations of the equation of state (EoS) based on contemporary lattice results and hadron resonance gas, and use them and the widely used $s95p$ parametrization to explore the uncertainty in the analysis due to the choice of the equation of state. We find that $ensuremath{eta}/s$ is most constrained in the temperature range $Tensuremath{approx}150$--220 MeV, where, for all EoSs, $0.08<ensuremath{eta}/s<0.23$ when taking into account the 90% credible intervals. In this temperature range the EoS parametrization has only a small $ensuremath{approx}10$% effect on the favored $ensuremath{eta}/s$ value, which is less than the $ensuremath{approx}30$% uncertainty of the analysis using a single EoS parametrization. Our parametrization of $(ensuremath{eta}/s)(T)$ leads to a slightly larger minimum value of $ensuremath{eta}/s$ than the previously used parametrizations. When we constrain our parametrization to mimic the previously used parametrizations, our favored value is reduced, and the difference becomes statistically insignificant." @default.
• W3036753718 created "2020-06-25" @default.
• W3036753718 creator A5006608436 @default.
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• W3036753718 date "2020-10-21" @default.
• W3036753718 modified "2023-10-01" @default.
• W3036753718 title "Temperature dependence of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>η</mml:mi><mml:mo>/</mml:mo><mml:mi>s</mml:mi></mml:mrow></mml:math> of strongly interacting matter: Effects of the equation of state and the parametric form of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>(</mml:mo><mml:mi>η</mml:mi><mml:mo>/</mml:mo><mml:mi>s</mml:mi><mml:mo>)</mml:mo><mml:mo>(</mml:mo><mml:mi>T</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>" @default.
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• W3036753718 doi "https://doi.org/10.1103/physrevc.102.044911" @default.
• W3036753718 hasPublicationYear "2020" @default.
• W3036753718 type Work @default.
• W3036753718 sameAs 3036753718 @default.

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