Abstract

In order to study the ΣN spin-orbit interaction, asymmetries of the polarized Σ + elastic scattering on proton has been measured. The polarized Σ + hyperons were produced through the p( π +,K +) Σ + reaction in a liquid-scintillator active target, and tracks of Σ +p scattering events were recorded with a newly-developed track detector named SCITIC (scintillating track image camera). Analyses of data from an early stage of experiment indicated a large Σ +p spin-orbit interaction in contrast to the case of the small ΔN spin-orbit interaction.

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