Temperature dependence of η/s of strongly interacting matter : effects of the equation of state and the parametric form of (η/s)(T)
Auvinen, J., Eskola, K. J., Huovinen, P., Niemi, H., Paatelainen, R., & Petreczky, P. (2020). Temperature dependence of η/s of strongly interacting matter : effects of the equation of state and the parametric form of (η/s)(T). Physical Review C, 102(4), Article 044911. https://doi.org/10.1103/physrevc.102.044911
Published inPhysical Review C
© 2020 the Authors
We investigate the temperature dependence of the shear viscosity to entropy density ratio η/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 √sNN=200 GeV and Pb+Pb collisions at 2.76 TeV and 5.02 TeV, using a 2+1D 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 η/s is most constrained in the temperature range T≈150–220 MeV, where, for all EoSs, 0.08
PublisherAmerican Physical Society (APS)
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingJ.A. and P.H. were supported by the European Research Council, Grant No. ERC-2016-COG:725741; P.H. was also supported by National Science Center, Poland, under grant Polonez DEC-2015/19/P/ST2/03333 receiving funding from the European Union's Horizon 2020 research and innovation program under Marie Skłodowska-Curie Grant Agreement No. 665778; K.J.E. and H.N. were supported by the Academy of Finland, Project No. 297058; and P.P. was supported by the US Department of Energy under Contract No. DE-SC0012704. ...
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