QCD Corrections to Spin Correlations in Top Quark Production at Lepton   Colliders
  Spin correlations, using a generic spin basis, are investigated to leading order in QCD for top quark production at lepton colliders. Even though, these radiative corrections induce an anomalous gamma/Z magnetic moment for the top quarks and allow for single, real gluon emission, their effects on the top quark spin orientation are very small. The final results are that the top (or anti-top) quarks are produced in an essentially unique spin configuration in polarized lepton collisions even after including the O(alpha_{s}) QCD corrections. 
Jiro Kodaira (Hiroshima Univ.), Takashi Nasuno (Hiroshima Univ.),   Stephen Parke (Fermi National Accelerator Laboratory)