{"paper":{"title":"Study of the $K_L \\!\\to\\! \\pi^0 \\nu \\overline{\\nu}$ Decay at the J-PARC KOTO Experiment","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"B. Beckford, C. Lin, D. Mcfarland, E. J. Kim, G. Y. Lim, H. Haraguchi, H. M. Kim, H. Nanjo, H. Nishimiya, H. Okuno, H. Watanabe, H. Y. Yoshida, I. Kamiji, J. Comfort, J. C. Redeker, J. L. Kim, J. Sanchez, J. W. Lee, K. Dona, K. Hanai, K. Kotera, K. Miyazaki, K. Nakagiri, KOTO Collaboration: J. K. Ahn, K. Sato, K. Shiomi, L. Zaidenberg, M. Campbell, M. Hutcheson, M. Isoe, M. Ohsugi, M. Sasaki, M. S. Farrington, M. Taylor, M. Tecchio, M. Togawa, N. Hara, N. McNeal, N. Sasao, N. Shimizu, Q. H. Vuong, Q. S. Lin, R. Murayama, R. Shiraishi, S. H. Chen, S. K. Lee, S. Shinohara, S. Su, S. Suzuki, T. Inagaki, T. Kato, T. K. Komatsubara, T. Mari, T. Masuda, T. Matsumura, T. Nomura, T. Nunes, T. Sato, T. Shimogawa, T. Shinkawa, T. Toyoda, T. Yamanaka, Y. B. Hsiung, Y.-C. Tung, Y. Luo, Y. Noichi, Y. Sato, Y. Sugiyama, Y. Tajima, Y. W. Wah","submitted_at":"2020-12-14T14:31:33Z","abstract_excerpt":"The rare decay $K_L \\!\\to\\! \\pi^0 \\nu \\overline{\\nu}$ was studied with the dataset taken at the J-PARC KOTO experiment in 2016, 2017, and 2018. With a single event sensitivity of $( 7.20 \\pm 0.05_{\\rm stat} \\pm 0.66_{\\rm syst} ) \\times 10^{-10}$, three candidate events were observed in the signal region. After unveiling them, contaminations from $K^{\\pm}$ and scattered $K_L$ decays were studied, and the total number of background events was estimated to be $1.22 \\pm 0.26$. We conclude that the number of observed events is statistically consistent with the background expectation. For this datas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.07571","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2012.07571/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"}