Color transparency and final-state interactions in photonuclear charmonium production
- Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)
The final-state interactions of quasielastically photoproduced charmonium have been computed in a quantum-mechanical QCD-inspired model for a range of photon energies and nuclear targets. In this model, charmonium in its rest frame interacts with an array of nucleon flux tubes via its color dipole moment as color electric fields flash'' on and off around it. The photoproduction amplitude is modeled as the narrowest superposition of open charmonium channels available at a given photon energy. A complete calculation of the final-state interactions has been performed; this involves retaining all the charmonium states present in the initial amplitude and produced upon interactions with the medium, and allowing them to scatter into each other upon further medium interactions. This work permits the computation of [ital A][sup [ital e][ital f][ital f]]/[ital A] with and without transparency''; the results support the utility of a study of the energy dependence of [ital A][sup [ital e][ital f][ital f]]/[ital A] in elucidating transparency in the exclusive process considered. Moreover, a comparison of the underlying [ital J]/[psi]-nucleon cross section with that deduced from a Glauber analysis of the computed [ital A] dependence shows the Glauber analysis to be misleading.
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 5801930
- Journal Information:
- Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:6; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
663410* -- Photonuclear Reactions & Photon Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
BOSONS
CHARMONIUM
COLOR MODEL
COMPOSITE MODELS
CROSS SECTIONS
DIRECT REACTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
FIELD THEORIES
FINAL-STATE INTERACTIONS
GLAUBER THEORY
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
QUASI-ELASTIC SCATTERING
QUASI-FREE REACTIONS
SCATTERING