What kind of experiment can be done with the KEK polarized beam

Among various experiments to be done at KEK (National Laboratory of High Energy Physics), the polarization phenomena at high momentum are described. The spin correlation parameters of elastic nucleon-nucleon scattering were predicted from the constituent interchange model and the quark-quark scattering model. The results were compared with the experimental results. To clarify the discrepancy between the experimental results and the prediction, some experiment at KEK was suggested. The spin asymmetry in the inclusive process of polarization experiment was measured. The hard scattering model was proposed to explain the measurement. The accumulation of experimental data is not sufficient. (Kato, T.)