Abstract

Using a propane bubble chamber the average cross-section for single pion production by neutrinos on free protons has been determined to be (1.13 ± 0.28) × 10 −38 cm 2 for neutrinos of energy between 1 and 4 GeV. The invariant mass distribution of the ( πp) system indicates that N ∗(1236) production is the dominant process. Angular distributions of the pion in the ( πp) rest frame are also presented. The results of the experiment are compared with theoretical predictions.

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