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arXiv · hep-ex/9510006

Search for the Decay $K^+ \to π^+ ν\overlineν$

S. Adler·M. S. Atiya·I-H. Chiang·J. S. Frank·J. S. Haggerty·T. F. Kycia·K. K. Li·L. S. Littenberg·A. Sambamurti·A. Stevens·R. C. Strand·C. Witzig·W. C. Louis·D. S. Akerib·M. Ardebili·M. R. Convery·M. M. Ito·D. R. Marlow·R. A. McPherson·P. D. Meyers·M. A. Selen·F. C. Shoemaker·A. J. S. Smith·E. W. Blackmore·D. A. Bryman·L. Felawka·P. Kitching·A. Konaka·V. A. Kujala·Y. Kuno·J. A. Macdonald·T. Nakano·T. Numao·P. Padley·J-M. Poutissou·R. Poutissou·J. Roy·R. Soluk·A. S. Turcot
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Abstract

An upper limit on the branching ratio for the decay $K^+ \! \rightarrow \! π^+ ν\overlineν$ is set at $2.4 \times 10^{-9}$ at the 90\% C.L. using pions in the kinematic region $214~{\rm MeV}/c < P_π< 231~{\rm MeV}/c$. An upper limit of $5.2 \times 10^{-10}$ is found on the branching ratio for decays $K^+ \! \rightarrow \! π^+ X^0$, where $X^0$ is any massless, weakly interacting neutral particle. Limits are also set for cases where $M_{X^0}>0$.

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S. Adler, M. S. Atiya, I-H. Chiang, J. S. Frank, J. S. Haggerty, T. F. Kycia, K. K. Li, L. S. Littenberg, A. Sambamurti, A. Stevens, R. C. Strand, C. Witzig, W. C. Louis, D. S. Akerib, M. Ardebili, M. R. Convery, M. M. Ito, D. R. Marlow, R. A. McPherson, P. D. Meyers, M. A. Selen, F. C. Shoemaker, A. J. S. Smith, E. W. Blackmore, D. A. Bryman, L. Felawka, P. Kitching, A. Konaka, V. A. Kujala, Y. Kuno, J. A. Macdonald, T. Nakano, T. Numao, P. Padley, J-M. Poutissou, R. Poutissou, J. Roy, R. Soluk, A. S. Turcot. 1995-10-18. Search for the Decay $K^+ \to π^+ ν\overlineν$. https://doi.org/10.1103/physrevlett.76.1421

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