Heidelberg 2015 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 44: Heavy Ion Collisions and QCD Phases 5
HK 44.1: Group Report
Wednesday, March 25, 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