Journal Article

GSI-2022-00072

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations

Gonzalez, V. (Corresponding author) ; Basu, S. ; Marin, A.GSI* ; Pan, J. ; Ladron de Guevara, P. ; Pruneau, C. A.

2021
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-021-09260-z  doi:10.15120/GSI-2022-00072

Abstract: The specific shear viscosity, 𝜂/𝑠, of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions at RHIC and LHC is estimated based on the progressive longitudinal broadening of transverse momentum two-particle correlators, 𝐺$_2$, reported as a function of collision centrality by the STAR and ALICE experiments. Estimates are computed as a function of collision centrality using the Gavin ansatz which relates the 𝐺$_2$ longitudinal broadening to the specific shear viscosity. Freeze out times required for the use of the ansatz are computed using a linear fit of freeze out times reported as a function of the cubic root of the charged particle pseudorapidity density (d𝑁ch/d𝜂)$^{1/3}$. Estimates of 𝜂/𝑠 based on ALICE data exhibit little to no dependence on collision centrality at LHC energy, while estimates obtained from STAR data hint that 𝜂/𝑠 might be a function of collision centrality at top RHIC energy.

Note: This article is licensed under a Creative Commons Attribution4.0 International License. Funded by SCOAP3.

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Contributing Institute(s):

1. ALICE (ALI)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)

Experiment(s):

1. no experiment theory work (POF3; theory)

Appears in the scientific report 2021

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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