Strange-particle production in π−p and π+p collisions at 4 GeV/c

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“…We estimate the ratios of K^K^n + neutrals to K^Kfn production as about 0.1 and 0.3 at 5 and 5 GeV/c, respectively, consistent with bubble-chamber values. 2 ' 6 Figures 2 and 3 show several characteristics of the reaction ir~p ^K^K^n at 4 and 5 GeV/c, respectively, for KfK* invariant masses less than 1.135 GeV/c 2 . The distribution of the square of the four-momentum transfer from target proton to neutron, -*, is shown in Figs.…”