Hybrid stars within a covariant, nonlocal chiral quark model
Nuclear Theory
2008-11-26 v2
Abstract
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.
Keywords
Cite
@article{arxiv.nucl-th/0703088,
title = {Hybrid stars within a covariant, nonlocal chiral quark model},
author = {D. B. Blaschke and D. Gomez Dumm and A. G. Grunfeld and T. Klahn and N. N. Scoccola},
journal= {arXiv preprint arXiv:nucl-th/0703088},
year = {2008}
}
Comments
9 pages, 3 figures, references added, Phys. Rev. C accepted for publication