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Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations

Gonzalez, Victor ; Basu, Sumit LU orcid ; Ladron de Guevara, Pedro ; Marin, Ana ; Pan, Jinjin and Pruneau, Claude A. (2020)
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
(dNch/dη)1/3. Estimates of η/s based... (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
(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. (Less)
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type
Working paper/Preprint
publication status
published
subject
pages
9 pages
publisher
arXiv.org
language
English
LU publication?
yes
id
5749b547-973d-47ec-90f1-e7a99898997f
alternative location
https://arxiv.org/pdf/2012.10542.pdf
date added to LUP
2021-04-12 15:53:14
date last changed
2022-05-12 15:41:28
@misc{5749b547-973d-47ec-90f1-e7a99898997f,
  abstract     = {{The specific shear viscosity, η/s, of the quark-gluon plasma formed in<br>
ultrarelativistic heavy-ion collisions at RHIC and LHC is estimated based on<br>
the progressive longitudinal broadening of transverse momentum two-particle<br>
correlators, G2, reported as a function of collision centrality by the STAR<br>
and ALICE experiments. Estimates are computed as a function of collision<br>
centrality using the Gavin ansatz which relates the G2 longitudinal<br>
broadening to the specific shear viscosity. Freeze out times required for the<br>
use of the ansatz are computed using a linear fit of freeze out times reported<br>
as a function of the cubic root of the charged particle pseudorapidity density<br>
(dNch/dη)1/3. Estimates of η/s based on ALICE data<br>
exhibit little to no dependence on collision centrality at LHC energy, while<br>
estimates obtained from STAR data hint that η/s might be a function of<br>
collision centrality at top RHIC energy.}},
  author       = {{Gonzalez, Victor and Basu, Sumit and Ladron de Guevara, Pedro and Marin, Ana and Pan, Jinjin and Pruneau, Claude A.}},
  language     = {{eng}},
  month        = {{12}},
  note         = {{Preprint}},
  publisher    = {{arXiv.org}},
  title        = {{Extraction of the specific shear viscosity of quark-gluon plasma from two-particle transverse momentum correlations}},
  url          = {{https://arxiv.org/pdf/2012.10542.pdf}},
  year         = {{2020}},
}