Photo- and electroproduction of N sup * in a quark model

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

DOI:https://doi.org/10.1103/PhysRevD.42.2194· OSTI ID:6313733

Close, F E ^[1]; Li, Z ^[2]

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

We review and update the theory on photo- and electroproduction in the nonrelativistic constituent quark model (NRCQM). The electromagnetic interaction Hamiltonian for a three-quark system is discussed, particularly the nonadditive term and the role of the binding potential which have been neglected in previous calculations. We find that the successes of the NRCQM survive these relativistic corrections and make predictions for baryon-resonance excitation that can be tested in forthcoming experiments; however, we suggest that some QCD improvements to the NRCQM are incomplete. Finally we discuss the limits of application of the long-wavelength approximation in resonance photo- and electroproduction.

• DOE Contract Number: AC05-84OR21400; AS05-76ER04936
• OSTI ID: 6313733
• 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
ANGULAR MOMENTUM
BARYONS
BASIC INTERACTIONS
COMPOSITE MODELS
ELECTROMAGNETIC INTERACTIONS
ELECTROPRODUCTION
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GAUGE INVARIANCE
GENERAL RELATIVITY THEORY
HADRONS
HAMILTONIANS
HELICITY
INTERACTIONS
INVARIANCE PRINCIPLES
ISOSPIN
MAGNETIC MOMENTS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
N BARYONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM OPERATORS
QUARK MODEL
RELATIVITY THEORY
SPIN