Regular Article - Theoretical Physics
Dyson-Schwinger approach to color superconductivity at finite temperature and density
Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, Darmstadt, Germany
Revised: 1 July 2013
Accepted: 5 July 2013
Published online: 1 August 2013
We investigate the phases of dense QCD matter at finite temperature with Dyson-Schwinger equations for the quark propagator for N f = 2 + 1 flavors. For the gluon propagator we take a fit to quenched lattice data and add quark-loop effects perturbatively in a hard-thermal-loop-hard-dense-loop approximation. We consider 2SC and CFL-like pairing with chiral up and down quarks and massive strange quarks and present results for the condensates and the phase diagram. We find a dominant CFL phase at chemical potentials larger than 500-600MeV. At lower values of the chemical potential we find a 2SC phase, which also exists in a small band at higher temperatures for larger chemical potentials. With values of 20–30 MeV, the critical temperatures to the normal phase turn out to be quite small.
© SIF, Springer-Verlag Berlin Heidelberg, 2013