Abstract
The linear and mode-coupled contributions to higher-order anisotropic flow are presented for Au+Au collisions at √sNN = 27, 39, 54.4, and 200 GeV and compared to similar measurements for Pb+Pb collisions at the Large Hadron Collider (LHC). The coefficients and the flow harmonics’ correlations, which characterize the linear and mode-coupled response to the lower-order anisotropies, indicate a beam energy dependence consistent with an influence from the specific shear viscosity (η /s). In contrast, the dimensionless coefficients, mode-coupled response coefficients, and normalized symmetric cumulants are approximately beam-energy independent, consistent with a significant role from initial- state effects. These measurements could provide unique supplemental constraints to (i) distinguish between different initial-state models and (ii) delineate the temperature (T ) and baryon chemical potential (μB ) dependence of the specific shear viscosity η / s (T , μB ).
Document Type
Article
Publication Date
2023
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.physletb.2023.137755
Funding Information
Funded by SCOAP.
Repository Citation
STAR Collaboration, "Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions" (2023). Physics and Astronomy Faculty Publications. 709.
https://uknowledge.uky.edu/physastron_facpub/709
Notes/Citation Information
© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).