Dense Matter and Neutron Stars in Parity Doublet Models

TL;DR

This paper explores dense matter and neutron star properties using parity doublet models, highlighting chiral symmetry restoration and hybrid star modeling with quark degrees of freedom.

Contribution

It introduces a parity doublet framework for dense matter, including quark degrees of freedom for hybrid star analysis, advancing understanding of chiral symmetry restoration in neutron stars.

Findings

Chiral symmetry restoration linked to baryon-parity partner degeneracy

Hybrid star models incorporating quarks are developed

Model predicts properties consistent with observed neutron star data

Abstract

We investigate the properties of dense matter and neutron stars. In particular we discuss model calculations based on the parity doublet picture of hadronic chiral symmetry. In this ansatz the onset of chiral symmetry restoration is reflected by the degeneracy of baryons and their parity partners. In this approach we also incorporate quarks as degrees of freedom to be able to study hybrid stars.