Thumbnail
Access Restriction
Open

Author David, J. C. ♦ Fayard, C. ♦ Lamot, G. H. ♦ Saghai, B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ STRANGENESS ♦ PHOTOPRODUCTION ♦ ELECTROPRODUCTION ♦ ELECTROMAGNETIC INTERACTIONS ♦ FEYNMAN DIAGRAM ♦ NUCLEONS ♦ HYPERONS ♦ KAONS ♦ RESONANCE ♦ COUPLING CONSTANTS ♦ POLARIZATION ♦ SENSITIVITY ♦ SU-3 GROUPS
Abstract 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.}
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Place United States
Journal Physical Review, C
Volume Number 53
Issue Number 6


Open content in new tab

   Open content in new tab