Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8196529 | Physics Letters B | 2007 | 7 Pages |
Abstract
We present a hybrid equation of state (EoS) for dense matter that satisfies phenomenological constraints from modern compact star (CS) observations which indicate high maximum masses (Mâ¼2Mâ) and large radii (R>12km). The corresponding isospin symmetric EoS is consistent with flow data analyses of heavy-ion collisions and a deconfinement transition at â¼0.55fmâ3. The quark matter phase is described by a 3-flavor Nambu-Jona-Lasinio model that accounts for scalar diquark condensation and vector meson interactions while the nuclear matter phase is obtained within the Dirac-Brueckner-Hartree-Fock (DBHF) approach using the Bonn-A potential. We demonstrate that both pure neutron stars and neutron stars with quark matter cores are consistent with modern CS observations. Hybrid star configurations with a CFL quark core are unstable within the present model.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
T. Klähn, D. Blaschke, F. Sandin, Ch. Fuchs, A. Faessler, H. Grigorian, G. Röpke, J. Trümper,