Phase Structure of Hot and/or Dense QCD with the Schwinger-Dyson Equation

Abstract

We investigate the phase structure of hot and/or dense QCD using the Schwinger-Dyson equation (SDE) with the improved ladder approximation in the Landau gauge. We show that the phase transition from the two-flavor color superconducting (2SC) phase to the quark-gluon plasma (QGP) phase is of second order, and that the scaling properties of the Majorana mass gap and the diquark condensate are consistent with mean field scaling. We examine the effect of the antiquark contribution and find that setting the antiquark Majorana mass equal to the quark one is a good approximation in the medium density region. We also study the effect of the Debye screening mass of the gluon and find that ignoring it causes the critical lines to move to the region of higher temperature and higher chemical potential.

31 pages, 10 figures, references added

References in corpus (1)

• Dyson-Schwinger Equations: Density, Temperature and Continuum Strong QCD

Cited by in corpus (9)

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• Extending the truncated Dyson-Schwinger equation to finite temperatures
• Pseudo-scalar {\boldm $q\bar{q}$} bound states at finite temperatures within a Dyson-Schwinger--Bethe-Salpeter approach
• The effect of an imaginary part of the Schwinger-Dyson equation at finite temperature and density