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HK: Fachverband Physik der Hadronen und Kerne

HK 66: Heavy Ion Collision and QCD Phases XIII

HK 66.7: Vortrag

Freitag, 18. März 2016, 15:45–16:00, S1/01 A04

FRG study of the chiral phase transition in a quark-meson model with (axial-)vector mesons — •Jürgen Eser and Dirk Rischke — Institut für Theoretische Physik, Goethe-Universität, Max-von-Laue- Str. 1, 60438 Frankfurt am Main

The functional renormalization group (FRG) technique, as a non-perturbative continuum approach towards the thermodynamics of quantum chromodynamics (QCD), is complementary to lattice calculations. We use this method to investigate the chiral phase transition in a quark-meson model based on the so-called extended linear sigma model (eLSM). Besides (pseudo-)scalar degrees of freedom the latter also includes vector and axial-vector mesons, which are promising candidates in order to indicate the formation of a quark- gluon plasma (QGP) during heavy-ion collisions. Compared to previous investigations of the eLSM, the evidently significant contribution of quark fields to the renormalization flow is now also taken into account. The chiral phase transition order within this model as well as the mass degeneracy of chiral partners occurring above the critical temperature will be discussed.