Dyson-Schwinger approach to color superconductivity at finite temperature and density

2013/03/31 by Daniel Müller, Michael Buballa, Jochen Wambach +1 · 33 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Mathematical physics #Physics #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #Superconductivity #Theoretical physics #hep-ph #nucl-th

paper · pdf · doi:10.1140/epja/i2013-13096-5

published in The European Physical Journal A 49(8) (Springer Science+Business Media) · 14 pages, 9 figures; v2: Fixed compatibility problems with latest evince version (Feynman diagrams not visible); v3: Discussion of chiral condensate added, discussion of strange quark mass changed, section VI. added, accepted version

arxiv created 2013/07/29 · arxiv updated 2013/07/30 · openalex publication_date 2013/07/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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 500-600 MeV. 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.

Citations

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