Abstract
The transverse momentum spectra of pions and protons produced in inelastic 4.2 GeV proton-proton collisions are presented. Shapes of the observed momentum spectra seem to be independent of the number of particles produced in an interaction ; however, the observed proton momenta tend toward higher values (by about a factor of 2) than the observed pion momenta. A transverse momentum spectrum for elastically scattered protons is compared to the proton spectrum from inelastic events. Good agreement is obtained for momenta above 300 MeV/c. Values of the proton transverse momentum less than about 100 MeV/c are much more probable for elastically scattered protons, while values around 150 MeV/c appear more probable for inelastically scattered protons.
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