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Title: Moving Forward to Constrain the Shear Viscosity of QCD Matter

Journal Article · · Physical Review Letters
 [1];  [2];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Department
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN BNL Research Center

In this work, we demonstrate that measurements of rapidity differential anisotropic flow in heavy-ion collisions can constrain the temperature dependence of the shear viscosity to entropy density ratio η/s of QCD matter. Comparing results from hydrodynamic calculations with experimental data from the RHIC, we find evidence for a small η/s ≈ 0.04 in the QCD crossover region and a strong temperature dependence in the hadronic phase. A temperature independent η/s is disfavored by the data. We further show that measurements of the event-by-event flow as a function of rapidity can be used to independently constrain the initial state fluctuations in three dimensions and the temperature dependent transport properties of QCD matter.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704; AC02-05CH11231
OSTI ID:
1336048
Alternate ID(s):
OSTI ID: 1254538
Report Number(s):
BNL-112315-2016-JA; R&D Project: PO-3
Journal Information:
Physical Review Letters, Vol. 116, Issue 21; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 53 works
Citation information provided by
Web of Science

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Cited By (9)

Re-running the QCD shear viscosity journal July 2018
Optical properties of an anisotropic hot QCD medium journal February 2020
In-medium viscous coefficients of a hot hadronic gas mixture journal October 2016
Transport coefficients of a hot QCD medium and their relative significance in heavy-ion collisions journal November 2017
Applying Bayesian parameter estimation to relativistic heavy-ion collisions: simultaneous characterization of the initial state and quark-gluon plasma medium text January 2016
Phenomenological Consequences of Enhanced Bulk Viscosity Near the QCD Critical Point text January 2016
In-medium viscous coefficients of a hot hadronic gas mixture text January 2017
Optical properties of an anisotropic hot QCD medium preprint January 2017
Effect of the QCD equation of state and strange hadronic resonances on multiparticle correlations in heavy ion collisions text January 2017