Thermodynamics of a three-flavor nonlocal Polyakov-Nambu-Jona-Lasinio model

Journal Article · Thu Apr 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.074034· OSTI ID:21409496

Hell, T; Roessner, S; Cristoforetti, M; Weise, W ^[1]

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

The present work generalizes a nonlocal version of the Polyakov-loop-extended Nambu and Jona-Lasinio (PNJL) model to the case of three active quark flavors, with inclusion of the axial U(1) anomaly. Gluon dynamics is incorporated through a gluonic background field, expressed in terms of the Polyakov loop. The thermodynamics of the nonlocal PNJL model accounts for both chiral and deconfinement transitions. Our results obtained in mean-field approximation are compared to lattice QCD results for N{sub f}=2+1 quark flavors. Additional pionic and kaonic contributions to the pressure are calculated in random phase approximation. Finally, this nonlocal three-flavor PNJL model is applied to the finite density region of the QCD phase diagram. It is confirmed that the existence and location of a critical point in this phase diagram depend sensitively on the strength of the axial U(1) breaking interaction.

• OSTI ID: 21409496
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 7; Other Information: DOI: 10.1103/PhysRevD.81.074034; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
DENSITY
FLAVOR MODEL
INTERACTIONS
MEAN-FIELD THEORY
PHASE DIAGRAMS
QUANTUM CHROMODYNAMICS
QUARKS
RANDOM PHASE APPROXIMATION
SYMMETRY BREAKING
THERMODYNAMICS
U-1 GROUPS
APPROXIMATIONS
CALCULATION METHODS
COMPOSITE MODELS
DIAGRAMS
FERMIONS
FIELD THEORIES
INFORMATION
LIE GROUPS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
QUANTUM FIELD THEORY
QUARK MODEL
SYMMETRY GROUPS
U GROUPS