Nuclear Matter and Neutron stars in a Parity Doublet Model

Understand

We investigate the properties of isospin-symmetric nuclear matter and neutron stars in a chiral model approach adopting the SU(2) parity doublet formulation.

• This ansatz explicitly incorporates chiral symmetry restoration with the limit of degenerate masses of the nucleons and their parity partners.
• Instead of searching for an optimized parameter set we explore the general parameter dependence of nuclear matter and star properties in the model.
• We are able to get a good description of ground state nuclear matter as well as large values of mass for neutron stars in agreement with observation.