Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

Sonia Kabana; Vipul Bairathi; STAR Collaboration

doi:10.1016/J.PHYSLETB.2023.137755

Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

Translated title of the contribution: Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

Sonia Kabana
, Vipul Bairathi
, STAR Collaboration

Institute of Higher Research

Universidad de Tarapacá

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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 initialstate 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).

Translated title of the contribution	Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions
Original language	English
Article number	137755
Pages (from-to)	1-8
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	839
DOIs	https://doi.org/10.1016/J.PHYSLETB.2023.137755
State	Published - 10 Apr 2023

Keywords

Collectivity
Correlation
Shear viscosity

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title = "Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions",

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{\textquoteright} 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 initialstate 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).",

keywords = "Collectivity, Correlation, Shear viscosity, Colectividad, Correlaci{\'o}n, Viscosidad de corte",

author = "Sonia Kabana and Vipul Bairathi and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

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day = "10",

doi = "10.1016/J.PHYSLETB.2023.137755",

language = "English",

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journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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T1 - Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

AU - Kabana, Sonia

AU - Bairathi, Vipul

AU - STAR Collaboration

PY - 2023/4/10

Y1 - 2023/4/10

N2 - 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 initialstate 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).

AB - 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 initialstate 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).

KW - Collectivity

KW - Correlation

KW - Shear viscosity

KW - Colectividad

KW - Correlación

KW - Viscosidad de corte

UR - https://www.scopus.com/pages/publications/85148578765

UR - https://publons.com/wos-op/publon/56873502/

U2 - 10.1016/J.PHYSLETB.2023.137755

DO - 10.1016/J.PHYSLETB.2023.137755

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SN - 0370-2693

VL - 839

SP - 1

EP - 8

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 137755

ER -

Beam energy dependence of the linear and mode-coupled flow harmonics in Au+Au collisions

Abstract

Keywords

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