{"paper":{"title":"Search for heavy neutrinos in $K^+\\to\\mu^+\\nu_H$ decays","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, V.F. Obraztsov, Y. Tamagawa, Yu.G. Kudenko, Y. Yoshimura, Zhe Wang","submitted_at":"2014-11-14T16:33:20Z","abstract_excerpt":"Evidence of a heavy neutrino, $\\nu_H$, in the $K^+\\to\\mu^+\\nu_H$ decays was sought using the E949 experimental data with an exposure of $1.70\\times 10^{12}$ stopped kaons. With the major background from the radiative $K^+\\to\\mu^+\\nu_\\mu\\gamma$ decay understood and suppressed, upper limits (90% C.L.) on the neutrino mixing matrix element between muon and heavy neutrino, $|U_{\\mu H}|^2$, were set at the level of $10^{-7}$ to $10^{-9}$ for the heavy neutrino mass region 175 to 300 MeV/$c^2$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3963","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"}