Approaching the QCD phase diagram for Nf = 2+1 and Nf = 2 + 1 + 1 quark flavors

FAIR Next Generation ScientistS 2014

Welzbacher, Christian A.^1 ; Fischer, Christian S.^1 ; Luecker, Jan^2,3

Institut fuer Theoretische Physik, Justus-Liebig-Universitaet Giessen, Heinrich-Buff-Ring 16, Giessen

D-35392, Germany^1

Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 16, Heidelberg

D-69120, Germany^2

Institut fuer Theoretische Physik, Goethe-Universitaet Frankfurt, Max-von-Laue-Strasse 1, Frankfurt/Main

D-60438, Germany^3

关键词: Critical end points;    Deconfinement;    Dynamical quarks;    Finite temperatures;    Landau gauge;    Light quarks;    Order parameter;    Qcd phase diagrams;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/599/1/012015/pdf
DOI  :  10.1088/1742-6596/599/1/012015

来源: IOP

【 摘 要 】

Recent results for the QCD phase structure at finite temperature and light-quark chemical potential are summarized, where the cases of Nf= 2 + 1 and Nf= 2 + 1 + 1 dynamical quark flavors are considered. Order parameters for the chiral and deconfinement transitions are obtained from solutions of a coupled set of truncated Dyson-Schwinger equations for the quark and gluon propagators of Landau gauge QCD. Based on very good agreement with lattice QCD for zero chemical potential the phase diagram in the whole T-μ plane and the appearance of a putative critical end-point at large chemical potential are studied.