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Modern compact star observations and the quark matter equation of state
Physics Division, Argonne National Laboratory.
Institut für Physik, Universität Rostock.
Institut für Theoretische Physik, Universität Tübingen.
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2007 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 654, no 5-6, 170-176 p.Article in journal (Refereed) Published
Abstract [en]

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 Msun) 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.

Place, publisher, year, edition, pages
2007. Vol. 654, no 5-6, 170-176 p.
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URN: urn:nbn:se:ltu:diva-4931DOI: 10.1016/j.physletb.2007.08.048Local ID: 2ee49950-cb05-11db-b3ed-000ea68e967bOAI: diva2:977805

Validerad; 2007; 20070305 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2016-10-19Bibliographically approved

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Sandin, Fredrik
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