The CSS parametrization for Hybrid Stars with the Field Correlator Method

5th Compact Stars in the QCD Phase Diagram

Burgio, G.F.^1

INFN, Sezione di Catania, Via S. Sofia 64, Catania

I-95123, Italy^1

关键词: Constant speed;    Many-body theory;    Neutron stars;    Nuclear matter equation of state;    Observational data;    Parametrizations;    Quark matter;    Superconducting gaps;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/861/1/012011/pdf
DOI  :  10.1088/1742-6596/861/1/012011

来源: IOP

【 摘 要 】

We explore the structure of hybrid stars based on a nuclear matter equation of state (EoS) built with the microscopic Brueckner-Hartree-Fock many-body theory, and a quark matter EoS derived with the Field Correlator Method (FCM), which can be accurately represented by the CSS (constant speed of sound) parametrization. We find that the main features of the hadron-quark phase transition are directly related to the FCM parameters, i.e. the quark-antiquark potential V1, the gluon condensate G2and the color-flavour superconducting gap , whose values range can be determined by the observational data on neutron star (NS) masses.