Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Heavy Ion Collisions and QCD Phases 1
HK 5.6: Talk
Monday, March 23, 2015, 16:00–16:15, T/HS1
Transport Coefficients in Yang–Mills Theory and QCD — •Nils Strodthoff1, Nicolai Christiansen1, Michael Haas1, and Jan M. Pawlowski1,2 — 1Institut fuer Theoretische Physik, Heidelberg, Germany — 2ExtreMe Matter Institute EMMI, Darmstadt, Germany
We calculate the shear viscosity over entropy density ratio η/s in Yang–Mills theory from the Kubo formula using an exact diagrammatic representation in terms of full propagators and vertices using gluon spectral functions as external input. We provide an analytic fit formula for the temperature dependence of η/s over the whole temperature range from a glueball resonance gas at low temperatures, to a high-temperature regime consistent with perturbative results. Subsequently we provide a first estimate for η/s in QCD.