Altenkort, Luis and Eller, Alexander M. and Francis, Anthony and Kaczmarek, Olaf and Mazur, Lukas and Moore, Guy D. and Shu, Hai-Tao (2023) Viscosity of pure-glue QCD from the lattice. PHYSICAL REVIEW D, 108 (1): 014503. ISSN 2470-0010, 2470-0029
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We calculate shear viscosity and bulk viscosity in SU(3) gauge theory on the lattice at 1.5Tc. The viscosities are extracted via a Kubo formula from the reconstructed spectral function which we determine from the Euclidean time dependence of the corresponding channel of the energy-momentum tensor correlators. We obtain unprecedented precision for the correlators by applying gradient-flow and blocking methods. The correlators are extrapolated to the continuum and then to zero-flow time. To extract the viscosities we fit theoretically inspired models to the lattice data and cross-check the fit results using the Backus-Gilbert method. The final estimates for shear and bulk viscosity are & eta;/s = 0.15-0.48 and & zeta;/s = 0.017-0.059.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENERGY-MOMENTUM TENSOR; GRADIENT-FLOW; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Mar 2024 11:49 |
| Last Modified: | 12 Mar 2024 11:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/59811 |
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