Abstract
Using the boundary-condition model, it is shown that the rise of theI-0S-state KN phase shift nearPL (kaon laboratory momentum)=800 MeV/c can be attributed to the effect of the K*N threshold. Approximately 2.8 mb of K* production at 1140 MeV/c is predicted for that channel. If the interchannel coupling is reduced for theI=1 channel in the ratio given by isovector exchange, the experimental production cross-section is obtained and the earlier fit to theI=1S-state phase shift altered negligibly. Elastic-boundary-condition fits are given for theP andD waves. The boundary radius, consistent with theory, is 0.45μ−1 except for oneD-state. The 0.7μ−1 radius required in the latter case indicates a significant repulsive potential tail.
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