Relativistic few body calculations
A modern treatment of the nuclear few-body problem must take into account both the quark structure of baryons and mesons, which should be important at short range, and the relativistic exchange of mesons, which describes the long range, peripheral interactions. A way to model both of these aspects is described. The long range, peripheral interactions are calculated using the spectator model, a general approach in which the spectators to nucleon interactions are put on their mass-shell. Recent numerical results for a relativistic OBE model of the NN interaction, obtained by solving a relativistic equation with one-particle on mass-shell, will be presented and discussed. Two meson exchange models, one with only four mesons ({pi},{sigma},{rho},{omega}) but with a 25% admixture of {gamma}{sup 5} coupling for the pion, and a second with six mesons ({pi},{sigma},{rho},{omega},{delta},{eta}) but pure {gamma}{sup 5}{gamma}{sup {mu}} pion coupling, are shown to give very good quantitative fits to the NN scattering phase shifts below 400 MeV, and also a good description of the {rvec p} {sup 40}Ca elastic scattering observables. Applications of this model to electromagnetic interactions of the two body system, with emphasis on the determination of relativistic current operators consistent with the dynamics and the exact treatment of current conservation in the presence of phenomenological form factors, will be described. 18 refs., 8 figs.
- Research Organization:
- Southeastern Universities Research Association, Newport News, VA (USA). Continuous Electron Beam Accelerator Facility
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 5790261
- Report Number(s):
- DOE/ER/40150-58; CEBAF-PR-88-013; CONF-8806322-1; ON: DE89006251; TRN: 89-006822
- Resource Relation:
- Conference: Workshop on electron-nucleus scattering, Elba (Italy), 7-15 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
QUARK MODEL
CALCIUM 40 TARGET
PROTON REACTIONS
MESONS
ELECTROMAGNETIC INTERACTIONS
FORM FACTORS
MANY-BODY PROBLEM
NUCLEAR MODELS
NUCLEON-NUCLEON INTERACTIONS
PHASE SHIFT
RELATIVISTIC RANGE
WAVE FUNCTIONS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
TARGETS
645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties
653003 - Nuclear Theory- Nuclear Reactions & Scattering