Abstract
Qualitative character of the S-wave plon- Houdry ThO/sub hyperon scattering is investigated and compared wlth the corresponding S-wave pion- nucleon scattering. Information on S-wave pion- Houdry ThO/sub hyperon scattering is obtained from K/sup -/ capture experiments which suggested large magnitudes of the phase shifts as well as large isotopic spin dependence. It is pointed out that these characteristics seem to be explained only when doublet approximation proposed by A. Pais is abandoned. Effects of the K-coupling to the S-wave pion- Houdry ThO/sub hyperon and the S-wave K/sup -/-nucleon scattering are also discussed and the result is that absorption process reflects rather significant effect on both scatterings, especially K/sup -/-nucleon scattering, even when K meson - baryon couplings are weaker than pion - baryon couplings by an order of magnitude. (autb)
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