Multipole approach for photo- and electroproduction of kaon

Abstract

We have analyzed the experimental data on K+Lambda photoproduction by using a multipole approach. In this analysis we use the background amplitudes constructed from appropriate Feynman diagrams in a gauge-invariant and crossing-symmetric fashion. Results of our analysis reveal the problem of mutual consistency between the new SAPHIR and CLAS data. We found that the problem could lead to different conclusions on ``missing resonances''. We have also extended our analysis to the finite Q^2 region and compared the result with the corresponding electroproduction data.

4 pages, 6 figures, talk given at IX International Conference on Hypernuclear and Strange Particle Physics (HYP2006), Mainz, Germany, 10-14 October 2006