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T: Fachverband Teilchenphysik

T 23: Quantenfeldtheorie 1

T 23.8: Talk

Tuesday, March 5, 2013, 18:40–18:55, WIL-C129

Yang Mills theory at finite temperature in Coulomb gauge — •Jan Heffner, Hugo Reinhardt, and Davide Campagnari — Institut fuer Theoretische Physik, Uni Tuebingen, Deutschland

The deconfinement phase transition of SU(2) Yang--Mills theory is investigated in the Hamiltonian approach in Coulomb gauge:

Within the variational approach a decent description of the infrared sector of vacuum Yang--Mills theory was obtained. Recently, this approach was extended to finite temperatures by considering the grand canonical ensemble making a suitable quasi-particle ansatz for the density operator and minimizing the free energy. Solving Dyson-Schwinger equations a critical temperature of the deconfinement phase transition is extracted.

Also the effective potential of the order parameter for confinement is calculated within the Hamiltonian approach by compactifying one spatial dimension and using a background gauge fixing. From the full non-perturbative potential calculated within a variational approach a critical temperature of the deconfinement phase transition of 269 MeV is found.