Observation of prompt neutrinos from 400 Gev proton-nucleus collisions
作者： P.C. Bosetti , H. Deden , M. Deutschmann , P. Fritze , H. Grässler
DOI: 10.1016/0370-2693(78)90081-3
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摘要: Abstract In 70 000 photos taken in BEBC during an experiment which the 400 GeV proton beam of CERN SPS was dumped into a massive Cu target 820 m upstream BEBC, interactions induced by neutral primaries above 10 were observed. 11 events secondary charged lepton is e − , four + . This number electron cannot be due to neutrinos from conventional sources (K, Λ, Σ decays). The flux additional (prompt) evaluated. Possible origins are discussed terms charmed particles, τ's, and as yet undiscovered particles. Limits given on axion production.
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