Heavy-neutrino search using K2 decay

R. S. Hayano, T. Taniguchi, T. Yamanaka, T. Tanimori, R. Enomoto, A. Ishibashi, T. Ishikawa, S. Sato, T. Fujii, T. Yamazaki, S. Kurokawa, S. R. Schnetzer, Y. Takada

Research output: Contribution to journalArticlepeer-review

101 Scopus citations


The muon momentum spectrum in K2 decay has been measured by using a high-resolution magnetic spectrograph to look for a discrete muon peak associated with heavy-neutrino emission. The spectrum revealed no distinct peak, and the upper bound of the mixing ratio between the muon neutrino and a massive neutrino has been determined to be 10-4-10-6 in the mass range of 70-300 MeV/c2.

Original languageEnglish (US)
Pages (from-to)1305-1309
Number of pages5
JournalPhysical review letters
Issue number18
StatePublished - 1982

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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