Quasiparticle method in relativistic mean-field theories of nuclear structure
In recent years, in order to understand the success of Dirac phenomenology, relativistic Brueckner-Hartree-Fock (RBHF) theory has been developed. This theory is a relativistic many-body theory of nuclear structure. Based upon the RBHF theory, which is characterized as having no free parameters other than those introduced in fitting free-space nucleon-nucleon scattering data, we construct an effective interaction. This interaction, when treated in a relativistic Hartree-Fock approximation, reproduces, rather accurately, the nucleon self-energy in nuclear matter, Migdal parameters obtained via relativistic Brueckner-Hartree-Fock calculations, and the saturation curves calculated with the full relativistic Brueckner-Hartree-Fock theory. This effective interaction is constructed by adding a number of pseudoparticles to the mesons used to construct one-boson-exchange (OBE) models of the nuclear force. The pseudoparticles have relatively large masses and either real or imaginary coupling constants. (For example, exchange of a pseudo-sigma with an imaginary coupling constant has the effect of reducing the scalar attraction arising from sigma exchange, while exchange of a pseudo-omega with an imaginary coupling constant has the effect of reducing the repulsion arising from omega exchange. The terms beyond the Born term in the case of pion exchange are well simulated by pseudo-sigma exchange with a real coupling constant.) The effective interaction constructed here may be used for calculations of the properties of finite nuclei in a relativistic Hartree-Fock approximation.
- Research Organization:
- City Univ. of New York, NY (USA)
- OSTI ID:
- 7187597
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NUCLEAR STRUCTURE
MEAN-FIELD THEORY
BRUECKNER MODEL
DIRAC EQUATION
HARTREE-FOCK METHOD
INTERACTIONS
MANY-BODY PROBLEM
MIGDAL THEORY
OBE MODEL
BOSON-EXCHANGE MODELS
DIFFERENTIAL EQUATIONS
EQUATIONS
MATHEMATICAL MODELS
NUCLEAR MODELS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE MODELS
PERIPHERAL MODELS
WAVE EQUATIONS
650000* - Physics (1980-)
653001 - Nuclear Theory- Nuclear Structure
Moments
Spin
& Models