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Chiral Symmetry Restoration and Deconfinement to Quark Matter in Neutron Stars

By V. A. Dexheimer and S. Schramm

Abstract

We describe an extension of the hadronic SU(3) non-linear sigma model to include quarks. As a result, we obtain an effective model which interpolates between hadronic and quark degrees of freedom. The new parameters and the potential for the Polyakov loop (used as the order parameter for deconfinement) are calibrated in order to fit lattice QCD data and reproduce the QCD phase diagram. Finally, the equation of state provided by the model, combined with gravity through the inclusion of general relativity, is used to make predictions for neutron stars.Comment: Prepared for Light-Cone 2009, Sao Jose dos Campos, Brazil, 8-13 July 2009

Topics: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Publisher: 'Elsevier BV'
Year: 2010
DOI identifier: 10.1016/j.nuclphysbps.2010.02.051
OAI identifier: oai:arXiv.org:0910.1312

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