New quark-model calculations of photo-and electroproduction of N* and and Delta * resonances
Conference
·
OSTI ID:954293
An introduction is given to the calculation of resonance electromagnetic coupling in the nonrelativistic quark model. Recent improvements brought about by the inclusion of relativistic corrections to the transition operator are described. We show how such calculations may be further improved by the use of relativized-model wave functions, a modestly increased effective quark mass, and an ab initio calculation of the signs of the N-pidecay amplitudes of the resonances. A summary is given of the results for the photocouplings of all nonstrage baryons, as well as for certain amplitude ratios in electroproduction.
- Research Organization:
- Thomas Jefferson Lab National Accelerator Facility
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 954293
- Report Number(s):
- CEBAF-TH-92-35
- Country of Publication:
- United States
- Language:
- English
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