Search for Anomaly at High x in Polarized Deep Inelastic Scattering Data
  An idea of possible anomalous contribution of non-perturbative origin to the nucleon spin was examined by analysing data on spin asymmetries in polarized deep inelastic scattering of leptons on nucleons. The region of high Bjorken x was explored. It was shown that experimental data available at present do not evidence for this effect. 
Wojciech Wislicki