A limit on spontaneous R parity breaking from Kamiokande

M. Mori, M. M. Nojiri, Y. Oyama, A. Suzuki, K. Takahashi, M. Yamada, H. Takei, K. Miyano, H. Miyata, K. S. Hirata, K. Inoue, T. Ishida, T. Kajita, K. Kihara, M. Nakahata, K. Nakamura, N. Sato, Y. Suzuki, Y. Totsuka, Y. YaginumaM. Koshiba, K. Nishijima, T. Kajimura, T. Suda, T. Tajima, Y. Fukuda, E. Kodera, Y. Nagashima, M. Takita, K. Kaneyuki, T. Tanimori

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


If R parity is not an exact symmetry in supersymmetric theories, the lightest supersymmetric partner, most favorably the neutralino, would not be stable, but may decay to produce energetic neutrinos. We show that a lack of excess neutrino events above the atmospheric neutrino background, obtained from upward-going muon data in Kamiokande, places a severe constraint on models of R parity breaking if the neutralino is a dark-matter particle.

Original languageEnglish
Pages (from-to)217-220
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 1992 Mar 19


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