Journal
PHYSICAL REVIEW D
Volume 90, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.091501
Keywords
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Funding
- Helmholtz Alliance [HA216/EMMI]
- Science Foundation Ireland [11-RFP.1-PHY3193]
- Landesgraduiertenforderung Baden-Wurttemberg via the Research Training Group Quantum Many-body Dynamics and Nonequilibrium Physics
- [ERC-AdG-290623]
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We compute nonperturbative gluon spectral functions at finite temperature in quenched QCD with the maximum entropy method. We also provide a closed loop equation for the spectral function of the energy-momentum tensor in terms of the gluon spectral function. This setup is then used for computing the shear viscosity over entropy ratio eta/s in a temperature range from about 0.4T(c) to 4.5T(c). The ratio eta/s has a minimum at about 1.25T(c) with the value of about 0.115. We also discuss extensions of the present results to QCD.
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