Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 44: Heavy Ion Collisions and QCD Phases 5

HK 44.1: Gruppenbericht

Mittwoch, 25. März 2015, 14:30–15:00, T/HS1

Dynamical Locking of the Chiral and the Deconfinement Phase Transition in QCD at Finite Chemical Potentials — •Paul Springer¹, Jens Braun², Marc Leonhardt², and Stefan Rechenberger² — ¹Physik Department, Technische Universität München, 85747 Garching — ²Institut für Kernphysik, Theoriezentrum, Technische Universität Darmstadt, 64289 Darmstadt

Studies of the QCD phase diagram at finite temperature and quark chemical potential are currently one of the most discussed topics in theoretical physics and are of great importance to better our understanding of heavy-ion collision experiments. However, the relation of confining and chiral dynamics is not yet completely understood. At vanishing chemical potential, results from lattice QCD indicate that the chiral and the deconfinement phase transition lie close to each other. In this talk, we analyze the fixed-point structure of four-fermion interactions in two-flavor QCD and show that there indeed appears to be a mechanism which dynamically locks the chiral phase transition to the deconfinement phase transition, both at vanishing and at finite quark chemical potential. As a direct consequence, this observation suggests that the chiral phase transition and the deconfinement phase transition temperatures lie close to each other.

This work is supported in part by BMBF