Effect of color superconductivity on the mass and radius of a quark star
- 20 February 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 69 (4), 045011
- https://doi.org/10.1103/physrevd.69.045011
Abstract
We compare quark stars made of color-superconducting quark matter to normal-conducting quark stars. We focus on the most simple color-superconducting system, a two-flavor color superconductor, and employ the Nambu–Jona-Lasinio (NJL) model to compute the gap parameter and the equation of state. By varying the strength of the four-fermion coupling of the NJL model, we study the mass and the radius of the quark star as a function of the value of the gap parameter. If the coupling constant exceeds a critical value, the gap parameter does not vanish even at zero density. For coupling constants below this critical value, mass and radius of a color-superconducting quark star change at most by compared to a star consisting of normal-conducting quark matter. For coupling constants above the critical value, mass and radius may change by factors of two or more.
Keywords
Other Versions
This publication has 33 references indexed in Scilit:
- Color superconducting quark matter core in the third family of compact starsPhysical Review D, 2003
- Neutron stars and the transition to color superconducting quark matterPhysics Letters B, 2003
- Nonstrange hybrid compact stars with color superconducting matterPhysical Review D, 2003
- High-density QCD pairing in compact star structureAstronomy & Astrophysics, 2003
- Compact stars with color superconducting quark matterPhysical Review D, 2003
- QUARK–DIQUARK EQUATIONS OF STATE MODELS: THE ROLE OF INTERACTIONSInternational Journal of Modern Physics D, 2003
- Color-neutral superconducting quark matterPhysical Review D, 2002
- Color–flavor unlocking and phase diagram with self-consistently determined strange-quark massesNuclear Physics A, 2002
- Prospects of Detecting Baryon and Quark Superfluidity from Cooling Neutron StarsPhysical Review Letters, 2000
- Superfluidity and superconductivity in relativistic fermion systemsPhysics Reports, 1984