Constraining η/s through high-p⊥ theory and data
Karmakar, B., Zigic, D., Salom, I., Djordjevic, M., Auvinen, J., Huovinen, P., & Djordjevic, M. (2023). Constraining η/s through high-p⊥ theory and data. Physical Review C, 108, Article 044907. https://doi.org/10.1103/PhysRevC.108.044907
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Physical Review CAuthors
Date
2023Copyright
© 2023 the Authors
We study whether it is possible to use high-p⊥ data/theory to constrain the temperature dependence of the shear viscosity over entropy density ratio η/s of the matter formed in ultrarelativistic heavy-ion collisions at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC). We use two approaches: (i) We calculate high-p⊥ RAA and flow coefficients v2, v3, and v4 assuming different (η/s)(T ) of the fluid-dynamically evolving medium. (ii) We calculate the quenching strength ( ˆq/T 3) from our dynamical energy loss model and convert it to η/s as a function of temperature. It turned out that the first approach cannot distinguish between different (η/s)(T ) assumptions when the evolution is constrained to reproduce the low-p⊥ data. In distinction, (η/s)(T ) calculated using the second approach agrees surprisingly well with the (η/s)(T ) inferred through state-of-the-art Bayesian analyses of the low-p⊥ data even in the vicinity of Tc, while providing much smaller uncertainties at high temperatures.
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American Physical Society (APS)ISSN Search the Publication Forum
2469-9985Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/194472892
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European Commission; Research Council of FinlandFunding program(s)
ERC Advanced Grant; Academy Project, AoF; Centre of Excellence, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This work is supported by the European Research Council, Grant No. ERC-2016-COG: 725741, and by the Ministry of Science and Technological Development of the Republic of Serbia. P.H. was also supported by the program Excellence Initiative–Research University of the University of Wrocław of the Ministry of Education and Science. J.A. acknowledges the financial support from the Academy of Finland Project No. 330448. J.A.'s research was also funded as a part of the Center of Excellence in Quark Matter of the Academy of Finland (Project No. 346325). This research is part of the European Research Council Project No. ERC-2018-ADG-835105 YoctoLHC. ...License
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