Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations
(2021) In European Physical Journal C 81(5).- 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, G2, 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 G2 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 (d Nch/dη) 1 / 3.... (More)
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, G2, 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 G2 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 (d Nch/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.
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- author
- Gonzalez, Victor ; Basu, Sumit LU ; Marin, Ana ; Pan, Jinjin ; Ladron de Guevara, Pedro and Pruneau, Claude A.
- organization
- publishing date
- 2021-05
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C
- volume
- 81
- issue
- 5
- article number
- 465
- publisher
- Springer
- external identifiers
-
- scopus:85106977960
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-021-09260-z
- language
- English
- LU publication?
- yes
- id
- 64d03f7a-cfcb-45eb-a4a3-9d360aef245a
- date added to LUP
- 2022-05-12 08:50:16
- date last changed
- 2023-04-11 02:29:07
@article{64d03f7a-cfcb-45eb-a4a3-9d360aef245a, abstract = {{<p>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<sub>2</sub>, 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<sub>2</sub> 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 (d N<sub>ch</sub>/dη) <sup>1 / 3</sup>. 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.</p>}}, author = {{Gonzalez, Victor and Basu, Sumit and Marin, Ana and Pan, Jinjin and Ladron de Guevara, Pedro and Pruneau, Claude A.}}, issn = {{1434-6044}}, language = {{eng}}, number = {{5}}, publisher = {{Springer}}, series = {{European Physical Journal C}}, title = {{Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations}}, url = {{http://dx.doi.org/10.1140/epjc/s10052-021-09260-z}}, doi = {{10.1140/epjc/s10052-021-09260-z}}, volume = {{81}}, year = {{2021}}, }