2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185401We calculate the nonperturbative charmonium - nucleon cross sections with the model of the stochastic vacuum, which has been succesfully applied in many high energy reactions. We also give a quantitative discussion of pre-resonance formation and medium effects.Talk given at QCD Euroconference 99, Montpellier, 7-13 July 1999, 4 pages, LatexHigh Energy Physics - Phenomenologytext