Chiral Phase Transition of QCD at Finite Temperature and Density from Schwinger-Dyson Equation

Abstract

We study the chiral phase transition of QCD at finite temperature and density by numerically solving Schwinger-Dyson equation for the quark propagator with the improved ladder approximation in the Landau gauge. Using the solution we calculate a pion decay constant from a generalized version of Pagels-Stokar formula. Chiral phase transition point is determined by analyzing an effective potential for the quark propagator. We find solutions for which chiral symmetry is broken while the value of the effective potential is larger than that for the chiral symmetric vacuum. These solutions correspond to meta-stable states, and the chiral symmetric vacuum is energetically favored. We present a phase diagram on the general temperature--chemical potential plane, and show that phase transitions are of first order in wide range.

23 pages (LaTeX-RevTeX), 14 PostScript figures

References in corpus (6)

• Pion mass and decay constant
• Chiral Symmetry Breaking in a Uniform External Magnetic Field
• Thermodynamic properties of a simple, confining model
• Deconfinement at finite chemical potential
• Chiral Symmetry Breaking in QED in a Magnetic Field at Finite Temperature
• Chiral symmetry breaking in a uniform external magnetic field II. Symmetry restoration at high temperatures and chemical potentials

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