Neutron star structure and Fermi-liquid properties of nuclear matter in a relativistic hadronic field theory

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5027928

Uechi, H

Neutron star properties are computed in relativistic models that contain both hadron and quark degrees of freedom. Neutron matter is assumed to have a low-density phase described by quantum hadrodynamics (QHD) and a high-density phase described by quantum chromodynamics (QCD). Several different QHD models and approximations are employed; all use parameters that reproduce the binding energy and density of equilibrium nuclear matter. Calculated neutron star properties depend primarily on the high-density equation of state and cannot be inferred from the symmetry energy or compressibility of equilibrium nuclear matter. If interactions are neglected in the QCD phase, the density of the hadron-quark phase transition is determined by one free parameter, which is the energy/volume needed to create a bubble that confines the quarks and gluons. Observed neutron star masses do not constrain this parameter, but stable neutron stars with quark cores can exist only for a limited range of parameter values. When second-order gluon-exchange corrections are included in the QCD phase, these conclusions are unchanged, and the parameter values that lead to stable hadron-quark stars are restricted even further. The Fermi-liquid properties of nuclear matter described by a relativistic quantum field theory are examined in terms of Landau's Fermi-liquid theory. The Landau parameters are derived microscopically from the ground state energy in the relativistic Dirac-Hartree-Fock approximation and are used to describe the thermodynamic properties of the system, such as the compressibility, the symmetry energy and the first sound velocity.

• Research Organization: Indiana Univ., Bloomington, IN (USA)
• OSTI ID: 5027928
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON STARS
NUCLEAR MATTER
FERMI GAS
BINDING ENERGY
DEGREES OF FREEDOM
FERMI GAS MODEL
GLUONS
HADRONS
HARTREE-FOCK METHOD
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RELATIVITY THEORY
THERMODYNAMICS
BOSONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
FLUIDS
GASES
GENERAL RELATIVITY THEORY
MATHEMATICAL MODELS
MATTER
NUCLEAR MODELS
POSTULATED PARTICLES
STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
653002 - Nuclear Theory- Nuclear Matter