Temperature dependence of η/s : uncertainties from the equation of state
Auvinen, J., Eskola, K. J., Huovinen, P., Niemi, H., Paatelainen, R., & Petreczky, P. (2019). Temperature dependence of η/s : uncertainties from the equation of state. In Confinement 2018 : Proceedings of the XIII Quark Confinement and the Hadron Spectrum Conference (Article 135). Sissa Medialab srl. POS Proceedings of Science, 336. https://doi.org/10.22323/1.336.0135
Published inPOS Proceedings of Science
© Authors, 2019
We perform a global 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 hydrodynamics model with the EKRT initial state and a shear viscosity over entropy density ratio (h=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. We find that the choice of the EoS does affect the favoured minimum value of η/s, although within the confidence limits of the analysis. On the other hand, our analysis hardly constrains the temperature dependence of η/s, no matter the EoS.
PublisherSissa Medialab srl
ConferenceQuark Confinement and the Hadron Spectrum Conference
Is part of publicationConfinement 2018 : Proceedings of the XIII Quark Confinement and the Hadron Spectrum Conference
Publication in research information system
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Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingJA was supported by the European Research Council, grant ERC-2016-COG:725741; KJE and HN were supported by the Academy of Finland, Project no. 297058; PH was 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 programme under the Marie Sklodowska-Curie grant agreement No 665778; PP was supported by U.S. Department of Energy under Contract No. DE-SC0012704. ...
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