Soft Component of Hard Reactions and Nuclear Shadowing (DIS, Drell-Yan   reaction, heavy quark production)
  We consider deep-inelastic lepton scattering, Drell-Yan lepton pair and heavy quark production in the reference frame of the target. These reactions traditionally treated as hard have, however, a substantial leading twist soft contribution. One of the manifestations of such a soft component, nuclear shadowing, is overviewed. 
Boris Kopeliovich (Heidelberg and Dubna)