Improved Polyakov-loop potential for effective models from functional calculations

• Verfasst von: Haas, Lisa Marie [VerfasserIn]
• Verfasst von: Stiele, Rainer [VerfasserIn]
• Verfasst von: Braun, Jens [VerfasserIn]
• Verfasst von: Pawlowski, Jan M. [VerfasserIn]
• Verfasst von: Schaffner-Bielich, Jürgen [VerfasserIn]
• Titel: Improved Polyakov-loop potential for effective models from functional calculations
• Verf.angabe: Lisa M. Haas, Rainer Stiele, Jens Braun, Jan M. Pawlowski, and Jürgen Schaffner-Bielich
• Fussnoten: Gesehen am 01.12.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2013
• Band/Heft Quelle: (2013) Artikel-Nummer 1302.1993, 19 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 156591984X

Abstract

We investigate the quark backreaction on the Polyakov loop and its impact on the thermodynamics of quantum chromodynamics. The dynamics of the gluons generating the Polyakov-loop potential is altered by the presence of dynamical quarks. However, this backreaction of the quarks has not yet been taken into account in Polyakov-loop extended model studies. In the present work, we show within a 2+1 flavour Polyakov-quark-meson model that a quark-improved Polyakov-loop potential leads to a smoother transition between the low-temperature hadronic phase and the high-temperature quark-gluon plasma phase. In particular, we discuss the dependence of our results on the remaining uncertainties that are the critical temperature and the parametrisation of the Polyakov-loop potential as well as the mass of the sigma-meson.