The Spin Structure of Nucleons and Deep Inelastic Scatterings

Abstract

Based on a simple model which is compatible with the idea of the static quark model and the parton model, the polarized structure functions of proton and deuteron, two-spin asymmetries of ${\pi }^0$ in polarized $pp$ reactions and inelastic $J/\psi$ productions in polarized lepton-proton collisions are analyzed. In particular, an important role of polarized gluon distributions is pointed out.

10 pages(Latex), 7 figures not included but available upon request (Invited talk presented at the XII International Seminar on High Energy Physics Problems- Relativistic Nuclear Physics and Quantum Chromodynamics-, Dubna, 12-17 September, 1994: to appear in the proceedings.)