Lawrence Berkeley National Laboratory

Leading charm hadrons produced in hadron-nucleus interactions cannot be adequately described within the parton fusion model. Recent results on charm baryon production in Sigma^- A interactions at 330 GeV with the WA89 detector disagree with fusion predictions. Intrinsic heavy quark pairs in the Sigma^-(dds) wave function provide a simple mechanism for producing fast charm hadrons. We calculate leading charm baryon production from Sigma^-, pi^- and p projectiles in a two component model combining partonfusion with intrinsic charm. Final state D^{-}, Sigma_{c}^{0}, Xi_{c}^{+}, and Lambda_{c}^{+} d sigma/dx_{F} distributions and D^-/D^+, D_s^-/D_s^+ and Lambda_c^+/overline Lambda^+_c asymmetries are compared to WA89 data. Predictions are made for 650 GeV Sigma^- A and pi^- A interactions in the SELEX detector at Fermilab and for 800 GeV pA interactions.