(Intermediate/high energy nuclear physics)
We have continued to develop a theoretical framework for the quark and gluon structure of nuclei. Our approach features a successful phenomenological model, the quark cluster model (QCM), and an ambitious program in the non-perturbative solution of quantum field theories. We have solved a non-trivial model field theory in the strong coupling regime using a discretized light front quantization (DLFQ) scheme. The method we developed expands upon the method of Pauli and Brodsky by incorporating a dynamical treatment of the vacuum. This is a major result since we have shown directly that the light-cone vacuum is not structureless as has been traditionally claimed by some particle theorists. We have thus succeeded in elucidating the consequences of spontaneous symmetry breaking in light-cone quantization. We now propose to address QCD in low dimensionality with the purpose of extracting non-perturbative predictions for quark and gluon amplitudes in few baryon systems. Simultaneously with this new effort we will continue to develop extensions and applications of the QCM. We propose to continue predicting phenomena to be observed in high energy particle-nucleus collisions that reflect the rearrangement of quarks and gluons in nuclei. We will complete our analysis of the SLAC NE3 data to explicate the degree to which they confirm the QCM prediction of ''steps'' in the ratio of nuclear structure functions when Bjorken x exceeds unity. In another effort, we will perform a search for narrow resonances in electron-positron interactions high in the continuum using the Bethe-Salpeter equation. We have completed our development of microscopic effective Hamiltonians for nuclear structure which include the explicit treatment of delta resonances. These effective Hamiltonians were successfully used in constrained mean field calculations evaluating conditions for nuclei to undergo a transition from nucleon matter to delta matter. 73 refs.
- Research Organization:
- Iowa State Univ. of Science and Technology, Ames (USA). Dept. of Physics
- DOE Contract Number:
- FG02-87ER40371
- OSTI ID:
- 7022332
- Report Number(s):
- DOE/ER/40371-T1; ON: DE88009917
- Country of Publication:
- United States
- Language:
- English
Similar Records
(Intermediate/high energy nuclear physics)
(Intermediate/high energy nuclear physics)
Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
QUANTUM CHROMODYNAMICS
RESEARCH PROGRAMS
CLUSTER MODEL
ELECTRON-POSITRON INTERACTIONS
GLUONS
QUARKS
ELEMENTARY PARTICLES
FIELD THEORIES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
NUCLEAR MODELS
PARTICLE INTERACTIONS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
645400* - High Energy Physics- Field Theory
653003 - Nuclear Theory- Nuclear Reactions & Scattering