Charm Hadroproduction at Fermilab E769
  E769 has just recorded on tape the interactions of 500 million pions, kaons, and protons. A Cerenkov counter and a TRD were used to tag beam particle types in both positive and negative 250 GeV/c hadron beams. Thin foil Be, Al, Cu, and W targets were used with a spectrometer including silicon microstrips to look for charm decay vertices. Preliminary results show D0 --> K- pi+ and D+ --> K- pi+ pi+ mass peaks. As the event reconstruction progresses on numerous parallel microprocessors, we intend to explore the pT, xF, A, and flavor dependence of the production of charmed mesons and baryons. 
D. J. Summers (1), et al. ((1) Fermilab) (Fermilab E769 Collaboration)