Thermodynamics of two-color QCD and the Nambu Jona-Lasinio model

Journal Article · Wed Sep 01 00:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.054013· OSTI ID:20705135

Ratti, Claudia ^[1]; Weise, Wolfram ^[1]

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1. Physik-Department, Theoretische Physik, Technische Universitaet Muenchen, D-85747 Garching (Germany)

We investigate two-flavor and two-color QCD at finite temperature and chemical potential in comparison with a corresponding Nambu and Jona-Lasinio model. By minimizing the thermodynamic potential of the system, we confirm that a second-order phase transition occurs at a value of the chemical potential equal to half the mass of the chiral Goldstone mode. For chemical potentials beyond this value the scalar diquarks undergo Bose condensation and the diquark condensate is nonzero. We evaluate the behavior of the chiral condensate, the diquark condensate, the baryon charge density and the masses of scalar diquark, antidiquark and pion, as functions of the chemical potential. Very good agreement is found with lattice QCD (N{sub c}=2) results. We also compare with a model based on leading-order chiral effective field theory.

• OSTI ID: 20705135
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BARYONS
BOSE-EINSTEIN CONDENSATION
C QUARKS
CHARGE DENSITY
CHIRAL SYMMETRY
CHIRALITY
COMPARATIVE EVALUATIONS
FLAVOR MODEL
FREE ENERGY
GOLDSTONE BOSONS
LATTICE FIELD THEORY
PHASE TRANSFORMATIONS
PIONS
POTENTIALS
QUANTUM CHROMODYNAMICS
REST MASS
SCALARS
T QUARKS
THERMODYNAMICS