Comparison of the Near-Threshold Production of eta- and K-Mesons in   Proton-Proton Collisions
  The pp -> pp eta and pp -> pLambda K^+ reactions near threshold are dominated by the first and second S_11 resonance respectively. It is shown that a one-pion-exchange model exciting these isobars reproduces well the ratio of the production cross sections. The consequences for this and other channels are discussed. 
Goran Faldt (Uppsala) and Colin Wilkin (UCL)