Results from Brookhaven experiment 787, a search for K+ → π+ νν

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Early results from a Brookhaven experiment designed to search for the rare decay K+ → π+νν are presented. A preliminary 90% confidence level branching ratio upper limit of BR(K+ → π+νν) < 3 × 10-8 is set. Preliminary upper limits of BR(K+ → π+μ+μ-) < 2.1 × 10-7 and BR(π0 → νν) < 8 × 10-7 at the 90% confidence level are also given.

Original languageEnglish (US)
Pages (from-to)568-570
Number of pages3
JournalNuclear Physics B (Proceedings Supplements)
Issue numberC
StatePublished - Jan 1 1990

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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