Mainz 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 21: Schwerionenkollisionen und QCD Phasen

HK 21.2: Vortrag

Dienstag, 20. März 2012, 17:00–17:15, P 5

Quark-Meson Model and Functional Renormalization Group — •Matthias Drews, Bertram Klein, and Wolfram Weise — Physikdepartment Technische Universität München, 85747 Garching

By coupling pions and the sigma boson to quarks, the quark-meson model serves to study the chiral phase transition. Our method is the functional renormalization group that interpolates in a non-perturbative way between the theory in the ultraviolet and in the infrared regime.

Quantum fluctuations are taken into account, which allow to treat the chiral phase transition at finite temperature and chemical potential beyond the mean-field approximation. In addition the model can be extended by the Polyakov-loop potential to include a notion of confinement.

Further novel steps towards inclusion of derivative couplings are discussed, with emphasis on an improved treatment of low-energy pion-pion interactions.

Work supported by BMBF, GSI and the Excellence Cluster "Origin and Structure of the Universe".