Higher-twist effects in semi-inclusive
Ammosov V. V. , Asratyan A.E., Gapienko G. S. , Gapienko V.A., Gorichev P. A. , Denisov A. G. , Efremenko V. I., Zaets V. G. , Klyukhin V. I. , Koreshev V. I. , Kruchinin S. P. , Kubantsev M. A. , Makhlyueva I. V. , Pitukhin P. V. , Sirotenko V. I. , Slobodyuk E. A. , Usubov Z. U. , Fedotov A. V. , Shevchenko V. G. , Shekelyan V. I.
Ay-z correlation has been observed for semi-inclusive νΝ—^μ^Η ~X reactions in the current fragmentation region in an antineutrino experiment carried out with the Fermilab 15-foot bubble chamber. This correlation can be explained as an effect of higher twists. When the kinematic effect is ignored, the parameter (?2r), which determines the magnitude of the higher-twist contribution, is estimated to be 0.18 + 0.06 (GeV/c)2.