KN Partial-wave Analysis and Z* Resonances. [Cross Sections, Polarization, Review]. PDF Download

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Book Description
Recent measurements and partial-wave analyses of KN scattering below 3 GeV/c are reviewed. There is a large amount of new data on Kn elastic and charge-exchange scattering, both cross sections and polarizations, which were not yet analyzed. Forward dispersion relations predict a striking forward dip in the K°p .-->. K/sup +/n differential cross section, which present neutral kaon beam measurements below 1.5 GeV/c are unable either to confirm or deny. K/sup +/p elastic polarization below 870 MeV/c was accurately measured for the first time. A K/sup +/p partial-wave analysis using these data claims a Z*1 resonance in the P13 wave at 1800 MeV. Spin-rotation parameter measurements near the backward direction would be a good experimental test for the existence of this Z*1. A partial-wave analysis of K/sup +/p .-->. K°.delta./sup + +/ has found no evidence for a Z*1 strongly coupled to the K.delta. channel. 27 references.