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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Schwerionenkollisionen und QCD Phasen

HK 60.7: Talk

Friday, March 23, 2012, 12:30–12:45, P 5

Computation of the 2nd order transport coefficient κ in the gluon plasma — Owe Philipsen and •Christian Schäfer — Goethe Universität, Frankfurt, Deutschland

From heavy-ion collision experiments we know that the quark-gluon plasma behaves almost like an ideal fluid and can be described by hydrodynamics. The dynamic properties of the quark-gluon plasma are determined by transport coefficients.

The second order transport coefficient κ is related to a momentum expansion of the euclidean energy-momentum tensor correlator at vanishing Matsubara frequency. The computation of the Fourier-transformed correlator in lattice gauge theory allows the determination of κ from first principles. We present the results obtained by pure Yang-Mills lattice simulations in comparison to a computation in quasi-free lattice perturbation theory.