Scientific article
Open access

Chiral phases of QCD at finite density and temperature

Published inPhysical review. D. Particles and fields, vol. 49, no. 1, p. 426-436
Publication date1994-01-01
First online date1994-01-01

Chiral transitions in QCD at finite temperature and density are discussed within a composite operator formalism. For massless quarks the phase diagram in temperature and chemical potentials presents a tricritical point at the intersection of the critical line for first-order phase transitions and second-order transitions. The overall picture is not sensibly affected by small quark masses, except that the quark condensate no longer vanishes for large temperatures and/or chemical potentials, and for first-order transitions it remains discontinuous only for small quark mass values. Such effects are discussed by Clausius-Clapeyron-like relations. The Landau expansion is used around the tricritical point and for second-order transitions.

  • Gauge field theory: SU(N)
  • Fermion: condensation
  • Effective action
  • Operator: composite
  • Finite temperature
  • Potential: chemical
  • Critical phenomena
  • Symmetry breaking: chiral
  • Numerical calculations
Citation (ISO format)
BARDUCCI, A. et al. Chiral phases of QCD at finite density and temperature. In: Physical review. D. Particles and fields, 1994, vol. 49, n° 1, p. 426–436. doi: 10.1103/PhysRevD.49.426
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Article (Published version)
ISSN of the journal0556-2821

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