Azimuthal asymmetries and Collins analyzing power
  Spin azimuthal asymmetries in pion electro-production in deep inelastic scattering off longitudinally polarized protons, measured by HERMES, are well reproduced theoretically with no adjustable parameters. Predictions for azimuthal asymmetries for a longitudinally polarized deuteron target are given. The z-dependence of the Collins fragmentation function is extracted. The first information on e(x) is extracted from CLAS A_LU asymmetry. 
A.V. Efremov (Dubna, JINR), K. Goeke (Ruhr U., Bochum), P. Schweitzer   (Pavia U.)