Comparison of eta and eta' production in the pp -> pp eta(eta')   reactions near threshold
  The total cross section of the pp -> pp eta' reaction has been measured at two energies near threshold by detecting the final protons in a magnetic spectrometer. The values obtained are about a factor of 70 less than for the corresponding eta production, in good agreement with the predictions of a one-pion-exchange model. 
F. Hibou, O. Bing, M. Boivin, P. Courtat, G. Faldt, R. Gacougnolle, Y.   Le Bornec, J. M. Martin, A. Moalem, F. Plouin, A. T...