The data on the total inelastic and partial cross sections inpNe interactions at 300 GeV are presented. It is found that the total cross section, u,,(pNe) = 356* 13 mb, and multiplicity distributions of the number of negative and relativistic charged particles are in good agreement with predictions of a multiple-scattering model based on Glauber's approach. The multiplicity of negative particles obeys the Koba-Nielsen-Olesen (KNO) scaling, but it is observed that the KNO function depends on the atomic mass number of the target. From an analysis of the average multiplicities of secondary particles, it is shown that approximately 10 percent of the fast ( p 2 1.2 GeV) positive secondaries are protons, which are derived from the nucleons in the neon nucleus.
We report observation of a neutrino-induced event with two electrons, one positron, one positively charged muon, a neutral K meson, and seven gammas in an experiment performed in the FNAL IS-ft.Bubble Chamber with a 47% atomic mixture of neon in hydrogen. Esti . -4 mated experimental electron backgrounds are ~lO per track. At present we have no plausible interpretation of this event.
The ratio of neutral-current to charged-current interactions is measured to be 0.30~k0.03 for isoscalar targets, in good agreement with the results of previous experiments. Two independent methods are employed for isolating neutral-current events, one based on hadronic interactions, and the other on the momentum transverse to the hadron shower. The ratio of neutral-current interactions on neutrons to those on protons is measured to be 1.08fO. 19.
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