Strangeness production in the pp and anti pp scattering

Monte-Carlo calculations for the in the construction phase being experiment COSY11 confirm the performability of the measurement of the reaction type pp→ppX for a meson X in the 1 GeV/c2 mass range in the neighbourhood of the reaction threshold. From the requirement of minimal acceptance confinement for this reaction type follows the dimensionation of the detector components. The expected counting and trigger rates for the fixed detector arrangement represents no limits for the lifetime of the detector components as well as the capacity of the data-acquisition system. For the near-threshold measurement range for the ppX reaction an acceptance of above 90 % results. Beyond the measurement of the main reaction anti pp→ΦΦ→K+K-K+K- at the PS202 experiment at LEAR, which is motivated by the search for glueballs, a measurement of reactions into an antihyperon-hyperon pair at high beam momenta of up to 2.0 GeV/c seems to be possible. The determination of total cross sections for the anti ΛΛ and anti Σ0Λ+c.c reaction at 1.9 GeV/c with values of 88±2 μbarn and 46±2 μbarn (statistical error) is compatible with the already present results of the PS185 experiment. Because of efficiency the analysis of the anti Σ0Σ0 channel is confined to the highest beam momentum of 2.0 GeV/c. The lack of anti Σ0Σ0 at the end of the analysis chain finds its cause in the too low integrated luminosity of the treated data set. An analysis of a recently avaible becomed data set at equal beam momentum, for which a higher integrateds luminosity is expected, is still pending