Negative kaon and antiproton production at 600, 650, and 700MeV/c by 28.4GeV/c protons

The double differential cross sections of negative kaons and antiprotons produced by 28.4GeV/c protons from platinum, copper, and aluminum targets at 606, 660, and 730MeV/c were measured as a function of angle, and are reported here. Comparison with the statistical model and the Sanford-Wang empirical formula predictions are made. The dependence of the cross sections as a function of nucleon number of the target is extracted and compared with other data as a function of Feynman x. Parameterization of the invariant particle distribution function in terms of x tilde is made, and compared with data of different primary and secondary momenta, and different targets