@article{1ff342edf291461696e36ad46524ee05,
title = "Search for the decay K+→π+ν{\=ν}",
abstract = "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.",
author = "Atiya, {M. S.} and Chiang, {I. H.} and Frank, {J. S.} and Haggerty, {J. S.} and Ito, {M. M.} and Kycia, {T. F.} and Li, {K. K.} and Littenberg, {L. S.} and A. Sambamurti and A. Stevens and Strand, {R. C.} and Louis, {W. C.} and Akerib, {D. S.} and Marlow, {D. R.} and Meyers, {P. D.} and Selen, {M. A.} and Shoemaker, {F. C.} and Smith, {A. J.S.} and Blackmore, {E. W.} and Bryman, {D. A.} and L. Felawka and P. Kitching and A. Konaka and Y. Kuno and MacDonald, {J. A.} and T. Numao and P. Padley and Poutissou, {J. M.} and R. Poutissou and J. Roy and R. Soluk and Turcot, {A. S.}",
note = "Copyright: Copyright 2015 Elsevier B.V., All rights reserved.",
year = "1993",
doi = "10.1103/PhysRevLett.70.2521",
language = "English (US)",
volume = "70",
pages = "2521--2524",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "17",
}