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1.
Temperature dependence of $\eta/s$ of strongly interacting matter: effects of the equation of state and the parametric form of $(\eta/s)(T)$ / Auvinen, Jussi (Belgrade, Inst. Phys.) ; Eskola, Kari J. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Huovinen, Pasi (Belgrade, Inst. Phys. ; Wroclaw U.) ; Niemi, Harri (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Paatelainen, Risto (CERN) ; Petreczky, Peter (Brookhaven)
We investigate the temperature dependence of the shear viscosity to entropy density ratio $\eta/s$ 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 Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Pb+Pb collisions at $2.76$ TeV and $5.02$ TeV, using a 2+1D hydrodynamical model with the EKRT initial state. [...]
arXiv:2006.12499; CERN-TH-2020-099.- 2020-10-22 - 17 p. - Published in : Phys. Rev. C 102 (2020) 044911 Fulltext: PDF; Fulltext from publisher: PDF;
2.
Temperature dependence of $\eta/s$: uncertainties from the equation of state / Auvinen, Jussi (Belgrade, Inst. Phys.) ; Eskola, Kari J. (Helsinki U. ; Helsinki Inst. of Phys.) ; Huovinen, Pasi (Wroclaw U.) ; Niemi, Harri (Helsinki U. ; Helsinki Inst. of Phys.) ; Paatelainen, Risto (CERN) ; Petreczky, Péter (Brookhaven)
We perform a global model-to-data comparison on Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Pb+Pb collisions at $2.76$ TeV and $5.02$ TeV, using a 2+1D hydrodynamics model with the EKRT initial state and a shear viscosity over entropy density ratio $(\eta/s)(T)$ with a linear $T$ dependence. To quantify the amount of uncertainty due to the choice of the equation of state (EoS), we compare analysis results based on four different EoSs: the well known $s95p$ parametrisation, an updated parametrisation based on the same list of particles in hadron resonance gas, but using recent lattice results for the partonic part of the EoS, and two new parametrisations based on the Particle Data Group 2016 particle list and the recent lattice results. [...]
arXiv:1811.01792.- SISSA, 2018-11-09 - 8 p. - Published in : PoS Confinement2018 (2018) 135 Fulltext: 1811.01792 - PDF; PoS(Confinement2018)135 - PDF;
In : 13th Quark Confinement and the Hadron Spectrum, Maynooth, Ireland, 31 Jul - 6 Aug 2018, pp.135

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