{"paper":{"title":"Study of the decay K+ => pi+,nu,nubar in the momentum region 140<Ppi<199 MeV/c","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Konaka, A. Kushnirenko, A.N. Khotjantsev, A.P. Kozhevnikov, B. Bassalleck, B. Bhuyan, B. Lewis, B. Viren, D.A. Bryman, D.E. Jaffe, D.I. Patalakha, D.V. Vavilov, E949 Collaboration: A.V. Artamonov, E.J. Ramberg, E.W. Blackmore, G. Redlinger, 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, S.V. Petrenko, T. Fujiwara, T.K. Komatsubara, T. Nakano, T. Nomura, T. Numao, T. Sato, T. Sekiguchi, T. Shinkawa, T. Tsunemi, T. Yoshioka, V.A. Mukhin, V.F. Obraztsov, Y. Tamagawa, Yu.G. Kudenko, Y. Yoshimura, Zhe Wang","submitted_at":"2009-02-28T01:22:46Z","abstract_excerpt":"Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay K+ => pi+,nu,nubar in the pion momentum region 140 < P_pi < 199 MeV/c in an exposure of 1.71e12 stopped kaons with an estimated total background of 0.93+-0.17(stat.)+0.32-0.24(syst.) events. This brings the total number of observed K+ => pi+,nu,nubar events to seven. Combining this observation with previous results, assuming the pion spectrum predicted by the standard model, results in a branching ratio of (1.73+1.15-1.05)e-10. An interpretation of the results for alternative models of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0030","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0903.0030/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}