{"paper":{"title":"Search for neutrinoless quadruple beta decay of $^{136}$Xe in XMASS-I","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.ins-det"],"primary_cat":"nucl-ex","authors_text":"A. Mason, A. Takeda, B. D. Xu, B. S. Yang, H.Ogawa, H. Sekiya, K. B. Lee, K. Fushimi, K.Hiraide, K.Ichimura, K. Kanzawa, K.Kobayashi, K. Martens, K. Masuda, K. Miuchi, K. Nishijima, K. Sato, M. K. Lee, M.Kobayashi, M. Nakahata, M. Yamashita, N.Kato, N. Y. Kim, R. Ishii, S. Moriyama, S. Nakamura, S. Tasaka, T. Suzuki, XMASS Collaboration : K.Abe, Y. D. Kim, Y. Fukuda, Y. H. Kim, Y. Itow, Y.Kishimoto, Y. Suzuki, Y. Takeuchi","submitted_at":"2022-05-11T01:36:20Z","abstract_excerpt":"A search for the neutrinoless quadruple beta decay of $^{136}$Xe was conducted with the liquid-xenon detector XMASS-I using $\\rm 327\\; kg \\times 800.0 \\; days$ of the exposure. The pulse shape discrimination based on the scintillation decay time constant which distinguishes $\\gamma$-rays including the signal and $\\beta$-rays was used to enhance the search sensitivity. No significant signal excess was observed from the energy spectrum fitting with precise background evaluation, and we set a lower limit of the half life of 3.7 $\\times$ 10$^{24}$ years at 90$\\%$ confidence level. This is the firs"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.05231","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/2205.05231/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"}