Nambu-Jona-Lasinio model of homogeneous neutral quark matter: Pseudoscalar diquark condensates revisited

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

DOI:https://doi.org/10.1103/PHYSREVD.81.054033· OSTI ID:21415202

Basler, H; Buballa, M ^[1]

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

We use a Nambu-Jona-Lasinio type model to investigate the phase diagram of dense quark matter under neutron star conditions in mean-field approximation. The model contains self-consistently determined quark masses and allows for diquark condensation in the scalar as well as in the pseudoscalar channel. The latter gives rise to the possibility of K{sup 0} condensation in the color-flavor locked phase. In agreement with earlier studies we find that this CFLK{sup 0} phase covers large regions of the phase diagram and that the predominant part of this phase is fully gapped. We show, however, that there exists a region at very low temperatures where the CFLK{sup 0} solutions become gapless, possibly indicating an instability towards anisotropic or inhomogeneous phases. The physical significance of solutions with pseudoscalar diquark condensates in the 2SC phase is discussed as well.

• OSTI ID: 21415202
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
APPROXIMATIONS
BOSONS
CALCULATION METHODS
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INFORMATION
INSTABILITY
KAONS
KAONS NEUTRAL
MASS
MATHEMATICAL SOLUTIONS
MATTER
MEAN-FIELD THEORY
MESONS
NEUTRON STARS
PHASE DIAGRAMS
PSEUDOSCALAR MESONS
QUARK MATTER
QUARKS
SIMULATION
STARS
STRANGE MESONS
STRANGE PARTICLES