The phase diagram of QCD at small chemical potentials

2007/12/04 by Sourendu Gupta, Gupta, Sourendu
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.0712.0434

openalex publication_date 2007/12/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the phase diagram of QCD at small chemical potentials, ie, when chiral and flavour symmetry breaking involves the pairing of a quark and an antiquark. The phase diagram of two-flavour QCD at small chemical potentials involves chiral symmetry restoration and charged pion condensation. We extend previous studies of the topology of the phase diagram, in sections with high degree of symmetry, to the physical case of fully broken flavour symmetry, using generic thermodynamic arguments. We argue that the extension is unique and present the result. In three flavour QCD the phase diagram for chiral symmetry restoration is less well constrained. However, we argue that present lattice data allows just two different phase diagrams, which we discuss.

Related

• Status of the QCD phase diagram from lattice calculations
• Constraining the QCD phase diagram at finite temperature and density
• Constraints on the two-flavor QCD phase diagram from imaginary chemical potential
• QCD phase diagram from chiral symmetry restoration: analytic approach at high and low temperature using the Linear Sigma Model with Quarks
• Confinement and chiral symmetry breaking, one or two critical points?