Calculations of K+, K- and phi Production in Near-Threshold   Proton-Nucleus Collisions
  K+, K- and \phi meson production in proton-nucleus (pA) collisions has been calculated within a BUU transport model. It is shown that the nucleon-hyperon strangeness transfer channel is essential. The role of three-body reactions has been investigated within the medium. The targetmass dependence of $\phi$ production is predicted to give important information on the in-medium properties of all three mesons. 
H.W. Barz (1), B. Kampfer (1), L. Naumann (1), Gy. Wolf (2), M.   Zetenyi (2) ((1) FZR Rossendorf, (2) KFKI Budapest)