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

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

2002-10-16

arxiv.org/abs/hep-ph/0210227v2

Prog.Theor.Phys. 109 (2003) 233-263

Physics

High Energy Physics

High Energy Physics - Phenomenology

31 pages, 10 figures, references added

Scientific paper

10.1143/PTP.109.233

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.

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