Total and Differential Cross Sections for the pp-->pp eta-prime Reaction   Near Threshold
  The eta-prime meson production in the reaction pp-->pp eta-prime has been studied at excess energies of Q = 26.5, 32.5 and 46.6 MeV using the internal beam facility COSY-11 at the cooler synchrotron COSY. The total cross sections as well as one angular distribution for the highest Q-value are presented. The excitation function of the near threshold data can be described by a pure s-wave phase space distribution with the inclusion of the proton-proton final state interaction and Coulomb effects. The obtained angular distribution of the eta-prime mesons is also consistent with pure s-wave production. 
A. Khoukaz, I. Geck, C. Quentmeier, H.-H. Adam, A. Budzanowski, R.   Czyzykiewicz, D. Grzonka, L. Jarczyk, K. Kilian, P. Kow...