Stability of color-flavor-locking cores in hybrid stars

Journal Article · Sat Mar 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.063004· OSTI ID:21249780

Pagliara, G; Schaffner-Bielich, J ^[1]

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1. Institut fuer Theoretische Physik, Goethe Universitaet, D-60438 Frankfurt am Main (Germany)

We study the equation of state strongly interacting quark matter within a Nambu-Jona-Lasinio-like model in which the chiral condensates and the color superconducting gaps are computed self-consistently as a function of the baryon density. A vector interaction term is added to the Lagrangian in order to render the quark matter equation of state stiffer. For the low density hadronic phase we use a relativistic mean field model. The phase transition to quark matter is computed by a Maxwell construction. We show that stable color-flavor-locking (CFL) cores in hybrid stars are possible if the superconducting gap is sufficiently large. Moreover we find stable stellar configurations in which two phase transitions occur, a first transition from hadronic matter to 2SC quark matter and a second transition from 2SC quark matter to CFL quark matter.

• OSTI ID: 21249780
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 6; Other Information: DOI: 10.1103/PhysRevD.77.063004; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CHIRALITY
COLOR MODEL
CONDENSATES
CONFIGURATION
DENSITY
EQUATIONS OF STATE
FLAVOR MODEL
HYBRIDIZATION
INTERACTIONS
LAGRANGIAN FUNCTION
MEAN-FIELD THEORY
PHASE TRANSFORMATIONS
QUARK MATTER
RELATIVISTIC RANGE
SIMULATION
STABILITY
STARS
STRONG INTERACTIONS
SUPERCONDUCTIVITY