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T: Fachverband Teilchenphysik
T 23: Gittereichtheorie
T 23.2: Talk
Thursday, March 1, 2012, 17:00–17:15, VG 3.101
QCD phase transition at finite temperature? — Szabolcs Borsányi1, Zoltán Fodor1,2,3, Jana Günther1, Christian Hölbling1, Sándor D. Katz1,2, Thorsten Kurth1, Kalman Szabo1, and •Lukas Varnhorst1 — 1Department of Physics, Bergische Universität Wuppertal, D-42119 Wuppertal, Germany — 2Institute for Theoretical Physics, Eötvös University, H-1117 Budapest, Hungary — 3Jülich Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany
We investigate the finite temperature phase transition at µ = 0 in 6-flavour QCD. It is believed that in QCD a transition between the deconfined phase at high temperature and the hadronic phase at low temperature exits. The type of the transition between these two states of matter depends on the quark masses. For physical quark masses it has been shown that the transition is an analytic crossover and not a true phase transition. However at lower quark masses it was suggested that a region exists where a first order phase transition occurs. These region should be separated from the crossover region by a line of second order phase transition.
As a first approach for finding this line of second order phase transition we present lattice calculations with six degenerate staggered quark fields and strong stout smearing. We observe evidence which might suggest a phase transition at low quark masses in this scenario.