Double transverse-spin asymmetries in Drell--Yan and $J/\psi$ production   from proton--antiproton collisions
  We perform a NLO numerical study of the double transverse-spin asymmetries in the $J/\psi$ resonance region for proton--antiproton collisions. We analyze the large $x$ kinematic region, relevant for the proposed PAX experiment at GSI, and discuss the implication of the results for the extraction of the transversity densities. 
V.Barone, C.Coriano A.Cafarella, M.Guzzi, P.Ratcliffe