Electromagnetic production of associated strangeness
- Institut de Physique Nucleaire de Lyon, Institut National de Physique Nucleaire et de Physique des Particules, CNRS, Universite Claude Bernard, F-69622 Villeurbanne cedex (France)
A formalism, based on an isobaric approach using Feynman diagrammatic techniques, which includes the nucleonic (spin {le} 5/2), hyperonic (spin 1/2), and kaonic resonances, is developed. Using this formalism, a thorough investigation of the following electromagnetic strangeness processes, for which experimental results are available, is performed: {gamma}{ital p}{r_arrow}{ital K}{sup +}{Lambda}, {ital K}{sup +}{Sigma}{sup 0}, {ital K}{sup 0}{Sigma}{sup +}, for {ital E}{sub {gamma}}{sup lab}{le} 2.1 GeV, {ital ep}{r_arrow}{ital e}{sup {prime}}{ital K}{sup +}{Lambda}, {ital e}{sup {prime}}{ital K}{sup +}{Sigma}{sup 0}, and {ital K}{sup {minus}}{ital p}{r_arrow}{gamma}{Lambda},{gamma}{Sigma}{sup 0}. A reaction mechanism, describing well enough the data, is found to include a reasonable number of baryonic resonances among a very large number of potential candidates. The extracted main kaon-hyperon-nucleon coupling constants are in good agreement with values predicted using SU(3) symmetry. The main findings of this model are compared with the results of other recent phenomenological studies. Predictions for the upcoming photoproduction polarization and electroproduction observables are presented, and their sensitivity to the phenomenological models ingredients are emphasized. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284750
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 53; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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