Role of two-flavor color superconductor pairing in a three-flavor Nambu-Jona-Lasinio model with axial anomaly

Journal Article · Mon Nov 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.094004· OSTI ID:21503783

Basler, H; Buballa, M ^[1]

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1. Institut fuer Kernphysik, Technische Universitaet Darmstadt, 64289 Darmstadt (Germany)

The phase diagram of strongly interacting matter is studied within a three-flavor Nambu-Jona-Lasinio model, which contains the coupling between chiral and diquark condensates through the axial anomaly. Our results show that it is essential to include the two-flavor color superconducting (2SC) phase in the analysis. While this is expected for realistic strange-quark masses, we find that even for equal up, down, and strange bare quark masses 2SC pairing can be favored due to spontaneous flavor symmetry breaking by the axial anomaly. This can lead to a rich phase structure, including BCS- and Bose-Einstein condensate-like 2SC and color-flavor locked phases and new endpoints. On the other hand, the low-temperature critical endpoint, which was found earlier in the same model without 2SC pairing, is almost removed from the phase diagram and cannot be reached from the low-density chirally broken phase without crossing a preceding first-order phase boundary. For physical quark masses no additional critical endpoint is found.

• OSTI ID: 21503783
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSE-EINSTEIN CONDENSATION
CHIRALITY
COLOR MODEL
COMPOSITE MODELS
CONDENSATES
COUPLING
DENSITY
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
FLAVOR MODEL
INFORMATION
INTERACTIONS
MASS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
PHASE DIAGRAMS
PHYSICAL PROPERTIES
QUARK MODEL
QUARKS
S QUARKS
SIMULATION
STRANGE PARTICLES
STRONG INTERACTIONS
SUPERCONDUCTORS
SYMMETRY BREAKING