The Dihadron fragmentation functions way to Transversity
  Observations of the transversity parton distribution based on an analysis of pion-pair production in deep inelastic scattering off transversely polarized targets are presented. This extraction relies on the knowledge of dihadron fragmentation functions, which are obtained from electron-positron annihilation measurements. This is the first attempt to determine the transversity distribution in the framework of collinear factorization. 
A. Courtoy, Alessandro Bacchetta, Marco Radici
hep-ph