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The ratio of forward K + production on copper, silver and gold targets to that on carbon has been measured at proton beam energies between 1.5 and 2.3 GeV as a function of the kaon momentum p K using the ANKE spectrometer at COSY-Julich. The strong suppression in the ratios observed for p K <200-250 MeV/c may be ascribed to a combination of Coulomb and nuclear repulsion...
The pp → pK + Λ reaction was measured at COSY with a proton beam momentum of 2.345 GeV/c, i.e. with an excess energy of 2 MeV above threshold. The total cross section was determined to be 8.2 ± 1.8 nb. The present data point close to the production threshold indicates, that existing phenomenological parametrizations of the total kaon production cross section are insufficient.
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