I present some results about transverse momentum dependent distribution and fragmentation functions. Firstly I illustrate a simple model, with predictive power about the energy behavior, for T-odd, chiral odd functions. Moreover I propose a slight modification in extracting transversity from HERMES data, so as to apply correctly factorization. Lastly I suggest a method for determining the quark transverse polarization in an unpolarized or spinless hadron.
@article{arxiv.hep-ph/0211060,
title = {Transverse momentum, factorization and the HERMES experiment},
author = {E. Di Salvo},
journal= {arXiv preprint arXiv:hep-ph/0211060},
year = {2008}
}