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We report here additional positive results of a search for muonless neutrino- and anti-neutrino-induced events using an enriched antineutrino beam and a muon identifier of relatively high geometric detection efficiency. The ratio of muonless to muon event rates is observed to be R=0. 200. 05. We observe no background derived from ordinary neutrino or antineutrino interactions that is capable of explaining the muonless signal.
Aubert et al. (1974) studied this question.