3,278 research outputs found
Missing Resonances in Kaon Photoproduction on the Nucleon
New kaon photoproduction data on a proton, gamma + p --> K+ + Lambda, are
analyzed using a multipole approach. The background terms are given in terms of
gauge invariant, crossing symmetric, Born diagrams with hadronic form factors,
while the resonances are parameterized using Breit-Wigner forms. Preliminary
results suggest a number of new resonances, as predicted by many quark model
studies. A comparison between the extracted multipoles and those obtained from
KAON-MAID is presented.Comment: 10 pages, 6 figures, invited talk at the International Symposium on
Electrophotoproduction of Strangeness on Nucleons and Nuclei (SENDAI 03),
Sendai, Japan, 16-18 Jun 200
Kaon and Hyperon Form Factors in Kaon Electroproduction on the Nucleon
The electromagnetic form factors of strange mesons and baryons are studied by
means of kaon electroproduction on the nucleon. The response functions that are
sensitive to the K0, Lambda, Sigma, and KK*\gamma transition form factors are
systematically explored. The effects of these form factors on several response
functions are discussed.Comment: 10 pages, Latex2e, 12 postscript figures. Invited talk given at the
International Conference on Hypernuclear and Strange Particle Physics
(HYP97), Brookhaven National Laboratory, USA, October 13-18, 1997. To be
published in Nucl. Phys.
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