Hybrid stars with color superconductivity within a nonlocal chiral quark model

Details Hybrid stars with color superconductivity within a nonlocal chiral quark model Hybrid stars with color superconductivity within a nonlocal chiral quark model

2003-03-23

arxiv.org/abs/astro-ph/0303518v4

Phys.Rev. C69 (2004) 065802

Astronomy and Astrophysics

Astrophysics

9 pages, 9 figures, 6 tables, Figs. 5-8 of v3 changed, Fig. 3 of v3 removed, new Fig. added, Tables IV-VI of v3 updated

Scientific paper

10.1103/PhysRevC.69.065802

The equation of state for quark matter is derived for a nonlocal, chiral quark model within the mean field approximation. Special emphasis is on the occurrence of a diquark condensate which signals a phase transition to color superconductivity and its effects on the equation of state. We present a fit formula for the Bag pressure, which is density dependent in case when the quark matter is color superconducting. We calculate the quark star configurations by solving the Tolman- Oppenheimer- Volkoff equations and demonstrate the effects of diquark condensation on the stability of hybrid stars for different formfactors of the quark interaction.

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