RECENT RESULTS FROM PROTVINO POLARIZED EXPERIMENT PROZA-M

Mochalov V. V., Borisov N. S., Davidenko A. M., Fedorov A. N., Grishin V. N., Khodyrev V. Yu., Kravtsov V. I., Lukhanin A. A., Matafonov V. N., Matulenko Yu. A., Medvedev V. A., Melnick Yu. M., Meschanin A. P., Morozov D. A., Neganov A. B., Nogach L. V., Nurushev S. B., Plis Yu. A., Prudkoglyad A. F., Semenov P. A., Shestermanov K. E., Solovianov V. L., Soloviev L. F., Usov Yu. A., Vasiliev A. N., Yakutin A. E.

Single-Spin Asymmetry AN (SSA) was measured at the Protvino 70 GeV accelerator. Asymmetry in the reaction p + p ->p0 + X is close to zero within error bars at small |xF| and pT<1.5 GeV/c. SSA in the reaction p- + p -> p0 + X at polarized target fragmentation region equals (-13.8 ± 3.8)% at |xf|>0.4. There is an indication that the asymmetry begins to rise up at the same centre-of-mass system pion energy.

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