Articulo
Hybrid stars within a covariant, nonlocal chiral quark model
Registro en:
issn:0556-2813
issn:1089-490X
Autor
Blaschke, David
Gómez Dumm, Daniel Alberto
Grunfeld, Ana Gabriela
Klähn, Thomas
Scoccola, Norberto Nerio
Institución
Resumen
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~2M⊙) 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. Instituto de Física La Plata