Abstract
Proton-proton interactions above 100 GeV have been studied in an experiment using cosmic-ray protons interacting in a liquid hydrogen target. From several hundred hydrogen interactions, it has been learned that: (a) the total inelastic pp cross section is not changing significantly with energy above 30 GeV; (b) the multiplicity distributions of charged prongs agree with a Poisson distribution in charged-particle pairs; (c) the average charged prong multiplicity increases as 1 n s; (d) the angular distribution of charged particles agrees with a c.m. momentum distribution of charged particles that varies as exp exp [−8 p T 2−8 x 2] d 3 p/ E (where x = p L/ p o) and a nucleon distribution that varies as 10 x exp [−3 p T 2] d 3 p/ E for 0.05 < × < 0.85. Further properties of the angular distributions, characteristics of the ionization calorimeter, the cross section in iron, and other features of the data are reported.
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