{"paper":{"title":"Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"hep-ex","authors_text":"A. Gando, A. Kozlov, A. Suzuki, B.D. Xu, B.E. Berger, B.K. Fujikawa, D.M. Markoff, D. Motoki, H. Ikeda, H.J. Karwowski, H. Tachibana, H. Watanabe, H. Yoshida, I. Shimizu, J.A. Detwiler, J. Shirai, KamLAND-Zen Collaboration: K. Asakura, K. Fushimi, K. Inoue, K. Ishidoshiro, K. Nakamura, K. Tamae, K. Ueshima, L.A. Winslow, M. Koga, M. Otani, M.P. Decowski, S. Enomoto, S. Hayashida, S. Ishio, S. Matsuda, S. Obara, S. Yoshida, T. Hachiya, T.I. Banks, T. Ishikawa, T. Mitsui, T. O'Donnell, T. Oura, W. Tornow, Y. Efremenko, Y. Gando, Y. Shirahata, Y. Takemoto","submitted_at":"2015-09-12T09:21:31Z","abstract_excerpt":"A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 0+1, 2+1 and 2+2 transitions of 0{\\nu}\\{beta}\\{beta} decay were evaluated in an exposure of 89.5kg-yr of 136Xe, while the same transitions of 2{\\nu}\\{beta}\\{beta} decay were evaluated in an exposure of 61.8kg-yr. No excess over background was found for all decay modes. The lower half-life limits of the 2+1 state transitions of 0{\\nu}\\{beta}\\{beta} and 2{\\nu}\\{beta}\\{beta} decay were improved to T(0{\\nu}, 0+ \\rightarrow 2+) > 2.6\\times10^25 yr a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03724","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"}