Hyperon production in the threshold region was studied in the reaction pp → K + Λp using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at the three different beam momenta of p beam = 2.95, 3.20 and 3.30 GeV/c, corresponding to excess energies of ε = 204, 285 and 316 MeV, respectively. Total cross-sections were deduced for the three beam momenta to be 23.9 ± 0.8 ± 2.0 µb, 28.4 ± 1.3 ± 2.2 µb and 35.0 ± 1.3 ± 3.0 µb. Differential observables including Dalitz plots were obtained. The analysis of the Dalitz plots reveals a strong influence of the
The reaction pp → ppη was measured at excess energies of 15 and 41 MeV at an external target of the Jülich Cooler Synchrotron COSY with the Time of Flight Spectrometer. About 25000 events were measured for the excess energy of 15 MeV and about 8000 for 41 MeV. Both protons of the process ppη were detected with an acceptance of nearly 100 % and the η was reconstructed by the missing mass technique. For both excess energies the angular distributions are found to be nearly isotropic. In the invariant mass *
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