A first estimate of η/s in Au+Au reactions at Elab = 1.23 AGeV
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.
Main Authors
Format
Articles
Research article
Published
2021
Series
Subjects
Publication in research information system
Publisher
Elsevier
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202104232470Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2021.136285
Language
English
Published in
Physics Letters B
Citation
- 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
License
Funder(s)
Research Council of Finland
Funding program(s)
Academy Project, AoF
Akatemiahanke, SA
Additional information about funding
The authors thank Behruz Kardan from the HADES collaboration for stimulating discussion at the “HIPSTARS - Workshop on Heavy Ion Physics and Compact Stars” workshop held online in December 2020. This work was supported by Helmholtz Forschungsakademie Hessen (HFHF), and in the framework of COST Action CA15213 THOR. G. Inghirami is supported by the Academy of Finland, Project no. 297058. Computational resources were provided by the Center for Scientific Computing (CSC) of the Goethe University.
Copyright© 2021 The Author(s). Published by Elsevier B.V.