New quark-model calculations of photo-and electroproduction of [ital N]* and and [Delta]* resonances

Conference · Sat Dec 05 04:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6442179

Capstick, S ^[1]

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1. Continuous Electron Beam Accelerator Facility, 12000 Jefferson Avenue, Newport News, VA 23606 (United States)

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 [ital ab] [ital initio] calculation of the signs of the [ital N] [pi] decay 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.

• OSTI ID: 6442179
• Report Number(s): CONF-9206203--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 269:1
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100 -- Particle Accelerators-- Design
Development
& Operation
662230 -- Quantum Chromodynamics-- (1992-)
662330* -- Photon & Charged-Lepton Interactions with Hadrons-- (1992)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYONS
BASIC INTERACTIONS
BINDING ENERGY
CEBAF ACCELERATOR
COMPOSITE MODELS
COUPLING
DECAY
DELTA BARYONS
DELTA-1232 BARYONS
ELECTROMAGNETIC INTERACTIONS
ELECTROPRODUCTION
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
FUNCTIONS
GENERAL RELATIVITY THEORY
HADRONS
INTERACTIONS
LINEAR ACCELERATORS
MATHEMATICAL MODELS
N BARYONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RELATIVITY THEORY
WAVE FUNCTIONS