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Low-Shear QCD Plasma from Perturbation Theory

1
AEC, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
2
Department of Physics, University of Cape Town, Rondebosch 7700, South Africa
*
Author to whom correspondence should be addressed.
Presented at Hot Quarks 2018—Workshop for Young Scientists on the Physics of Ultrarelativisticr Nucleus-Nucleus Collisions, Texel, The Netherlands, 7–14 September 2018.
Proceedings 2019, 10(1), 7; https://doi.org/10.3390/proceedings2019010007
Published: 10 April 2019
We argue that the inferred ratio of shear viscosity to entropy density of the quark-gluon plasma, h/s < 0.5 near the deconfinement temperature Tc, can be understood from perturbative QCD. To rebut opposite views, we first show that the existing leading order result should not be expanded in logarithms. After then settling the question of scale for the running coupling, we establish a temperature dependence of h/s which agrees well with constraints from hydrodynamics.
MDPI and ACS Style

Jackson, G.; Peshier, A. Low-Shear QCD Plasma from Perturbation Theory. Proceedings 2019, 10, 7.

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