Hybrid stars within a covariant, nonlocal chiral quark model

Details Hybrid stars within a covariant, nonlocal chiral quark model Hybrid stars within a covariant, nonlocal chiral quark model

2007-03-27

arxiv.org/abs/nucl-th/0703088v2

Phys.Rev.C75:065804,2007

Physics

Nuclear Physics

Nuclear Theory

9 pages, 3 figures, references added, Phys. Rev. C accepted for publication

Scientific paper

10.1103/PhysRevC.75.065804

We present a hybrid equation of state (EoS) for dense matter in which a nuclear matter phase is described within the Dirac-Brueckner-Hartree-Fock (DBHF) approach and a two-flavor quark matter phase is modelled according to a recently developed covariant, nonlocal chiral quark model. We show that modern observational constraints for compact star masses (M ~ 2 M_sun) can be satisfied when a small vector-like four quark interaction is taken into account. The corresponding isospin symmetric EoS is consistent with flow data analyses of heavy ion collisions and points to a deconfinement transition at about 0.55 fm^-3.

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