A1 Journal article (refereed)
A first estimate of η/s in Au+Au reactions at Elab = 1.23 AGeV (2021)

Reichert, T., Inghirami, G., & Bleicher, M. (2021). A first estimate of η/s in Au+Au reactions at Elab = 1.23 AGeV. Physics Letters B, 817, Article 136285. https://doi.org/10.1016/j.physletb.2021.136285

JYU authors or editors

Publication details

All authors or editors: Reichert, Tom; Inghirami, Gabriele; Bleicher, Marcus

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2021

Volume: 817

Article number: 136285

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2021.136285

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/75176

Publication is parallel published: https://arxiv.org/abs/2011.04546

Abstract

The HADES experiment at GSI has recently provided data on the flow coefficients v1,...,v4 for protons in Au+Au reactions at Elab=1.23AGeV (or sNN=2.4GeV). This data allows to estimate the shear viscosity over entropy density ratio, η/s at low energies via a coarse graining analysis of the UrQMD transport simulations of the flow harmonics in comparison to the experimental data. By this we can provide for the first time an estimate of η/s≈0.65±0.15 (or (8±2)(4π)−1) at such low energies.

Keywords: particle physics

Free keywords: relativistic heavy ion collisions

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Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 2