Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Schwerionenkollisionen und QCD Phasen
HK 13.6: Vortrag
Montag, 17. März 2014, 18:00–18:15, HZ 7
Thermodynamics and phase structure of the Polyakov–Quark-Meson model — Jens Braun1,2, Eduardo S. Fraga3,4, Lisa M. Haas5,2, Tina K. Herbst5, Bruno W. Mintz6, Mario Mitter5,4, Jan M. Pawlowski5,2, Rudnei O. Ramos6, Bernd-Jochen Schaefer7,8, Jürgen Schaffner-Bielich4, and •Rainer Stiele5 — 1Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI — 3Instituto de Física, Universidade Federal do Rio de Janeiro — 4Institut für Theoretische Physik, Goethe-Universität Frankfurt — 5Institut für Theoretische Physik, Universität Heidelberg — 6Departamento de Física Teórica, Universidade do Estado do Rio de Janeiro — 7Institut für Theoretische Physik, Justus-Liebig-Universität Giessen — 8Institut für Physik, Karl-Franzens-Universität Graz
Polyakov-loop extended chiral effective models are important tools to describe the phase structure and thermodynamics of strongly interacting matter. We show that taking into account the backreaction of quarks onto the gauge sector is crucial in such models to achieve results for the order parameters and thermodynamics that are in line with lattice calculations. Achieving a good description of lattice data at zero density, we test the reliability of those models in systems containing other control parameters besides the temperature by confronting its results with lattice data at nonzero isospin. Furthermore, we investigate the phase structure of the three-dimensional T−µisospin−µquark phase diagram and calculate the surface tension of the first order phase transition at small temperatures and large quark densities.