Charged- and neutral-particle production from 400-GeV/c pp collisions

Charged- and neutral-particle production from 400-GeV/c pp collisions are measured simultaneously using the Fermilab 15-ft bubble chamber. The π⁰ and K⁰ cross sections are rising at Fermilab energies, while the Λ⁰ cross section remains fairly constant. Similarly, the average number of π⁰'s and K⁰'s increases as a function of the number of negative particles in an event, yet no such dependence is noted for the Λ⁰'s. The ratio of average number of π⁰ to average number of π^- per inelastic collisions is found to be constant at Serpukhov and Fermilab energies (40 to 400 GeV/c) and equal to 1.22±{}0.02. Cross sections for Σ⁰ and Σ⁰ production are measured and limits are found for η⁰ and ω⁰ production. Neutral- and charged-pion correlations are compared with five pion-production models.