Limits of the Probability that Trimuons Are Produced by a New Short-Lived Source of Neutrinos

Abstract

Confidence levels against the hypothesis that the trimuon events observed with the large-angle neutrino detector (NEULAND) at Fermilab were induced by new kinds of neutrinos associated with short-lived particles were estimated to be 99.9%, 99%, and 85%, respectively, for the trimuon events in the three categories in which the momentum of the lowest energy muon is greater than 5, 10, and 20 GeV/c.