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T: Fachverband Teilchenphysik

T 23: Quantenfeldtheorie 1

T 23.7: Talk

Tuesday, March 5, 2013, 18:25–18:40, WIL-C129

Lattice computation of the transport coefficient κ in pure Yang-Mills theory — •Christian Schäfer and Owe Philipsen — Goethe-Universität, Frankfurt am Main, Germany

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 kappa 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 as well as the temperature dependency of the transport coefficient kappa.