{"paper":{"title":"Search for the rare decay $K^+\\to\\mu^+\\nu\\bar\\nu\\nu$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Konaka, A. N. Khotjantsev, A. O. Izmaylov, A. T. Shaikhiev, A. V. Artamonov, B. Bassalleck, B. Bhuyan, B. Lewis, B. Viren, D. A. Bryman, D. E. Jaffe, D. I. Patalakha, D. V. Vavilov, E. W. Blackmore, G. Redlinger, Hanyu Wei, I.-A. Christidi, I-H. Chiang, J. A. Macdonald, J. Hu, J. Ives, J. Mildenberger, J. S. Frank, K. K. Li, K. Mizouchi, K. Omata, L. G. Landsberg, L. S. Littenberg, M. Kobayashi, M. Miyajima, M. M. Khabibullin, M. Nomachi, M. V. Diwan, N. Muramatsu, N. V. Yershov, O. V. Mineev, P. Kitching, P. S. Cooper, R. C. Strand, R. Poutissou, R. Tschirhart, S. Chen, S. H. Kettell, S. Kabe, S. Sugimoto, T. Fujiwara, T. K. Komatsubara, T. Nakano, T. Nomura, T. Numao, T. Sato, T. Sekiguchi, T. Shinkawa, T. Tsunemi, T. Yoshioka (E949 Collaboration), V. F. Obraztsov, Y. Tamagawa, Yu. G. Kudenko, Y. Yoshimura, Zhe Wang","submitted_at":"2016-06-29T11:39:31Z","abstract_excerpt":"Evidence of the $K^+\\to\\mu^+\\nu\\bar\\nu\\nu$ decay was searched for using E949 experimental data with an exposure of $1.70\\times 10^{12}$ stopped kaons. The data sample is dominated by the backgrond process $K^+\\to\\mu^+\\nu_\\mu\\gamma$. An upper limit on the decay rate $\\Gamma(K^+\\to\\mu^+\\nu\\bar\\nu\\nu)< 2.4\\times 10^{-6}\\Gamma(K^+\\to all)$ at 90% confidence level was set assuming the Standard Model muon spectrum. The data are presented in such a way as to allow calculation of rates for any assumed $\\mu^+$ spectrum."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.09054","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}