gamma* -> rhoT impact factor with twist three accuracy
  We evaluate the impact factor of the transition gamma* -> rhoT taking into account the twist 3 contributions. We show that a gauge invariant expression is obtained with the help of QCD equations of motion. Our results are free of end-point singularities. This opens the way to a consistent treatment of factorization for exclusive processes with a transversally polarized vector meson. 
I.V. Anikin, D.Yu. Ivanov, B. Pire, L. Szymanowski, S. Wallon