Transversity Distribution Functions in the Valon Model
  By using the valon model, we calculate the Transverse Momentum Distribution functions, TMDs, inside the Nucleon. TMDs indicate the probability to find partons with spin aligned (anti- aligned) to the transversely polarized nucleon. The results are in good agreements with all available experimental data and also global fits. 
Z.Alizadeh Yazdi, F.Taghavi-Shahri, F.Arash, M.E.Zomorrodian
hep-ph