dorsal/arxiv
View SchemaModern compact star observations and the quark matter equation of state
| Authors | T. Klahn, D. Blaschke, F. Sandin, C. Fuchs, A. Faessler, H. Grigorian, G. Ropke, J. Trumper |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0609067 |
| URL | https://arxiv.org/abs/nucl-th/0609067 |
| DOI | 10.1016/j.physletb.2007.08.048 |
| Journal | Phys.Lett.B654:170-176,2007 |
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 (M = 2 M_sun) and large radii (R> 12 km). The corresponding isospin symmetric EoS is consistent with flow data analyses of heavy-ion collisions and a deconfinement transition at approx. 0.55 fm^{-3}. 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 (QCSs) are consistent with modern CS observations. Hybrid star configurations with a CFL quark core are unstable.
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"abstract": "We present a hybrid equation of state (EoS) for dense matter that satisfies\nphenomenological constraints from modern compact star (CS) observations which\nindicate high maximum masses (M = 2 M_sun) and large radii (R\u003e 12 km). The\ncorresponding isospin symmetric EoS is consistent with flow data analyses of\nheavy-ion collisions and a deconfinement transition at approx. 0.55 fm^{-3}.\nThe quark matter phase is described by a 3-flavor Nambu--Jona-Lasinio model\nthat accounts for scalar diquark condensation and vector meson interactions\nwhile the nuclear matter phase is obtained within the\nDirac-Brueckner-Hartree-Fock (DBHF) approach using the Bonn-A potential. We\ndemonstrate that both pure neutron stars and neutron stars with quark matter\ncores (QCSs) are consistent with modern CS observations. Hybrid star\nconfigurations with a CFL quark core are unstable.",
"arxiv_id": "nucl-th/0609067",
"authors": [
"T. Klahn",
"D. Blaschke",
"F. Sandin",
"C. Fuchs",
"A. Faessler",
"H. Grigorian",
"G. Ropke",
"J. Trumper"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.physletb.2007.08.048",
"journal_ref": "Phys.Lett.B654:170-176,2007",
"title": "Modern compact star observations and the quark matter equation of state",
"url": "https://arxiv.org/abs/nucl-th/0609067"
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