Nuclear matter and neutron stars in a parity doublet model

Journal Article · Fri Feb 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.025803· OSTI ID:21068157

Dexheimer, V ^[1]; Schramm, S ^[1]; Zschiesche, D ^[2]

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1. Franfurt Institute for Advanced Studies, J. W. Goethe Universitaet, Ruth-Moufang-Str. 1, D-60438 Frankfurt (Germany)
2. Institut fuer Theoretische Physik, J. W. Goethe Universitaet, Max-von-Laue Str. 1, D-60438 Frankfurt (Germany)

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.

• OSTI ID: 21068157
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 2; Other Information: DOI: 10.1103/PhysRevC.77.025803; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHIRAL SYMMETRY
CHIRALITY
GROUND STATES
ISOSPIN
NEUTRON STARS
NUCLEAR MATTER
NUCLEAR MODELS
NUCLEONS
PARITY
REST MASS
SU-2 GROUPS