High energy nuclear structures

Conference · Fri Mar 09 04:00:00 EST 1984

OSTI ID:6844975

Boguta, J; Kunz, J

In conventional nuclear physics the nucleus is described as a non-relativistic many-body system, which is governed by the Schroedinger equation. Nucleons interact in this framework via static two-body potentials, mesonic degrees of freedom are neglected. An alternative description of nuclear physics in terms of a relativistic field theory has been developed by Walecka. The model Lagrangian containing baryons, sigma-mesons and ..omega..-mesons was subsequently extended to include also ..pi..-mesons and rho-mesons. An essential feature of such a nuclear Lagrangian is its renormalizability. In addition to the description of known nuclear structure the field theoretical approach may reveal entirely new nuclear phenomena, based on the explicit treatment of mesonic degrees of freedom. The existence of such abnormal nuclear states was proposed by Lee and Wick employing the sigma-model Lagrangian. There the non-linearity of the meson field equations allows for soliton solutions in the presence of nucleons, in particular the sigma-field may exhibit a kink. Different types of soliton solutions occur in gauge theories with hidden symmetries. In the phenomenological Lagrangian the rho-meson is described by a non-abelian gauge field, that acquires its mass spontaneously due to the non-vanishing vacuum expectation value of a Higgs field. A general ansatz for soliton solutions of such a gauge theory was given by Dashen et al. A specific solution and its possible implications for nuclear physics like anomalous nuclear states were discussed by Boguta.

• Research Organization: Lawrence Berkeley Lab., CA (USA); Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6844975
• Report Number(s): LA-UR-84-823; CONF-8403101-6; ON: DE84010062
• Country of Publication: United States
• Language: English

Related Subjects

653007* -- Nuclear Theory-- Nuclear Models-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
ELEMENTARY PARTICLES
FIELD THEORIES
FUNCTIONS
GENERAL RELATIVITY THEORY
HADRONS
HIGGS MODEL
LAGRANGIAN FIELD THEORY
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
NUCLEAR MODELS
NUCLEAR STRUCTURE
PARTICLE MODELS
QUANTUM FIELD THEORY
QUASI PARTICLES
RELATIVITY THEORY
RENORMALIZATION
RESONANCE PARTICLES
RHO-765 RESONANCES
SIGMA MODEL
SOLITONS
UNIFIED GAUGE MODELS
VECTOR MESONS