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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Schwerionenkollisionen und QCD Phasen VII

HK 56.5: Vortrag

Donnerstag, 24. März 2011, 17:45–18:00, HS AP

QCD at finite temperature and density from Dyson-Schwinger equations — •Jan Lücker¹ and Christian S. Fischer^1,2 — ¹Institut für Theoretische Physik I, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen — ²GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1 64291 Darmstadt

I present results on the QCD phase diagram obtained from the Dyson-Schwinger equations (DSEs) of QCD, concentrating on the chiral and deconfinement transitions. The used truncation scheme includes a quenched gluon with full temperature dependence from lattice data, and the quark loop from the gluon DSE to account for unquenching. For the chiral transition we find the standard scenario of a crossover which turns into a first order transition at a critical endpoint. To extract the deconfinement transition line we calculate the dressed Polyakov loop and find a pseudo-critical temperature above the chiral transition in the crossover region, but coinciding transition temperatures close to the critical endpoint.