QCD mixing effects in a gauge-invariant quark model for photo- and electroproduction of baryon resonances

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.2207· OSTI ID:6228277

Li, Z ^[1]; Close, F E ^[2]

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1. Department of Physics, The University of Tennessee, Knoxville, TN (USA)
2. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN (USA) Department of Physics, The University of Tennessee, Knoxville, TN (USA) Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX (England)

The photo- and electroproduction of baryon resonances are calculated in the constituent quark model with chromodynamics of Isgur and Karl consistently to {ital O}({ital v}{sup 2}/{ital c}{sup 2}) for the quarks. We find that the successes of the nonrelativistic quark model are preserved, some problems are removed, and QCD mixing effects may become important with increasing {ital q}{sup 2} in electroproduction. For the first time both spectroscopy and transitions receive a unified treatment within the framework of a potential quark model.

• DOE Contract Number: AC05-84OR21400; AS05-76ER04936
• OSTI ID: 6228277
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:7; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
COMPOSITE MODELS
COULOMB FIELD
EIGENSTATES
ELECTRIC FIELDS
ELECTROMAGNETIC INTERACTIONS
ELECTROPRODUCTION
ELEMENTARY PARTICLES
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
GAUGE INVARIANCE
GENERAL RELATIVITY THEORY
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
N BARYONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RELATIVITY THEORY
SPECTRA
WAVE FUNCTIONS