Charged- and neutral-particle production from 400-GeV/cppcollisions

Abstract

Charged- and neutral-particle production from 400-GeV/c $\mathrm{pp}$ collisions are measured simultaneously using the Fermilab 15-ft bubble chamber. The ${\ensuremath{\pi}}^{0}$ and ${K}^{0}$ cross sections are rising at Fermilab energies, while the ${\ensuremath{\Lambda}}^{0}$ cross section remains fairly constant. Similarly, the average number of ${\ensuremath{\pi}}^{0}$'s and ${K}^{0}$'s increases as a function of the number of negative particles in an event, yet no such dependence is noted for the ${\ensuremath{\Lambda}}^{0}$'s. The ratio of average number of ${\ensuremath{\pi}}^{0}$ to average number of ${\ensuremath{\pi}}^{\ensuremath{-}}$ per inelastic collisions is found to be constant at Serpukhov and Fermilab energies (40 to 400 GeV/c) and equal to 1.22\ifmmode\pm\else\textpm\fi{}0.02. Cross sections for ${\ensuremath{\Sigma}}^{0}$ and ${\overline{\ensuremath{\Sigma}}}^{0}$ production are measured and limits are found for ${\ensuremath{\eta}}^{0}$ and ${\ensuremath{\omega}}^{0}$ production. Neutral- and charged-pion correlations are compared with five pion-production models.