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arXiv · 1908.00711

Influence of EOS on compact star made of hidden sector nucleons

Shinji Maedan
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Abstract

We study compact star made of degenerate hidden sector nucleons which will be a candidate for cold dark matter. A hidden sector like QCD is considered, and as the low energy effective theory we take (hidden sector) $ SU(2) $ chiral sigma model including hidden sector vector meson. With the mean field approximation, we find that one can treat the equation of state (EOS) of our model analytically by introducing a variable which depends on the Fermi momentum. The EOS is specified by the two parameters $ C'_{/sigma} $,$ C'_{/omega} $, and we discuss how these parameters affect on the mass-radius relation for compact star as well as on the EOS. The dependence of the maximum stable mass of compact stars on the parameter $ C'_{/sigma} $ will also be discussed.

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Shinji Maedan. 2019-08-02. Influence of EOS on compact star made of hidden sector nucleons. https://doi.org/10.1093/ptep/ptaa014

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