Momentum Spectra of Charged Pions Produced in Proton-Proton Interactions Between 13 and 28.5 GeV/c

Proton-proton interactions with four or more charged particles in the final state are studied over a range of incident momenta between 13 and 28.5 GeV/c. Topology cross sections are presented. The center-of-mass momentum distributions of ${\pi }^{+}$ and ${\pi }^{-}$ are determined and are successfully parametrized. The ${\pi }^{+}$ and ${\pi }^{-}$ momentum spectra are found to have approximately the same shape. Multiple fireball production is not required by our data.