Search for the decay K+→π+νν̄

M. S. Atiya, I. H. Chiang, J. S. Frank, J. S. Haggerty, M. M. Ito, T. F. Kycia, K. K. Li, L. S. Littenberg, A. Sambamurti, A. Stevens, R. C. Strand, W. C. Louis, D. S. Akerib, D. R. Marlow, P. D. Meyers, M. A. Selen, F. C. Shoemaker, A. J.S. Smith, E. W. Blackmore, D. A. BrymanL. Felawka, P. Kitching, A. Konaka, Y. Kuno, J. A. MacDonald, T. Numao, P. Padley, J. M. Poutissou, R. Poutissou, J. Roy, R. Soluk, A. S. Turcot

Research output: Contribution to journalArticlepeer-review


An upper limit on the branching ratio for the decay K+→π+νν ̄ is set at 7.5 × 10-9 (90% C.L.) using the kinematic region above the Kπ2 (K+→π+π0) peak. When combined with our result from below the Kπ2 peak, we obtain the limit 5.2 × 10-9. An upper limit of 1.7 × 10-9 is also found on the branching ratio for decays of the form K+→π+X0 where X0 is any massless, weakly interacting neutral particle. Limits are also set for cases where MX0>0.

Original languageEnglish (US)
Pages (from-to)2521-2524
Number of pages4
JournalPhysical review letters
Issue number17
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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