{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QY4RI7PRI4C6AJ7YMMOWB6Q4II","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9a480f18d8fea9e1660fa2f782ea1d2828dae546ec238d9b2d2aeb7576145292","cross_cats_sorted":["hep-ex","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-08-21T17:47:04Z","title_canon_sha256":"b5fcd0704ce136c643dc1106a2ea39ad849e76f13e6a58ee9113b28eaacdaa05"},"schema_version":"1.0","source":{"id":"1108.4193","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.4193","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"arxiv_version","alias_value":"1108.4193v2","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.4193","created_at":"2026-05-18T04:07:52Z"},{"alias_kind":"pith_short_12","alias_value":"QY4RI7PRI4C6","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QY4RI7PRI4C6AJ7Y","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QY4RI7PR","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:aee840de50c2583b21cc167f2313cef3485b82331fb56ed94cd845a19e9cfbed","target":"graph","created_at":"2026-05-18T04:07:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report the observation of two-neutrino double-beta decay in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) +- 0.21 (sys.) x 10^21 yr. This second order process, predicted by the Standard Model, has been observed for several nuclei but not for Xe-136. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrino-less double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.","authors_text":"A. Burenkov, A. Coppens, A. Dobi, A. G. Dolgolenko, A. Johnson, A. Karelin, A. Kuchenkov, A. Kumar, A. Odian, A. Piepke, A. Pocar, A. Rivas, A. R. Muller, A. Sabourov, A. Waite, B. Aharmim, B. Cleveland, B. Mong, C. Benitez-Medina, C. G. Davis, C. Hagemann, C. Hall, C. Hargrove, C. Ouellet, C. Y. Prescott, D. Franco, D. Freytag, D. J. Auty, D. Mackay, D. Sinclair, D. S. Leonard, D. Tosi, E. Beauchamp, E. Conti, E. Rollin, F. Leonard, F. LePort, G. Giroux, G. Gratta, G. Haller, I. Counts, J. Cook, J. Davis, J. D. Wright, J. Farine, J. Hodgson, J. J. Russell, J.-L. Vuilleumier, J.-M. Vuilleumier, J. Wodin, K. Barry, K. Donato, K. Graham, K. Hall, K. O'Sullivan, K. Pushkin, K. Skarpaas, K. S. Kumar, K. Twelker, K. Wamba, L. Bartoszek, L. J. Kaufman, L. Yang, M. Auger, M. Breidenbach, M. Hughes, M. J. Dolinski, M. Marino, M. Montero Diez, M. P. Green, M. Swift, M. V. Danilov, M. Weber, N. Ackerman, O. Ya. Zeldovich, P. C. Rowson, P. Fierlinger, P. Morgan, P. S. Barbeau, P. Vogel, R. Conley, R. DeVoe, R. Gornea, R. Herbst, R. MacLellan, R. Neilson, R. Nelson, S. Cook, S. Herrin, S. Slutsky, S. Waldman, T. Daniels, T. Koffas, T. Walton, U. Wichoski, V. Belov, V. Stekhanov, V. Strickland, W. Craddock, W. Fairbank Jr., Y. Martin, Y.-R. Yen, Z. Djurcic","cross_cats":["hep-ex","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-08-21T17:47:04Z","title":"Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4193","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:dfdb8f7e242225b3e8eadc1a2467d0e06a64767b22a1991481fca60c8af6fab7","target":"record","created_at":"2026-05-18T04:07:52Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"9a480f18d8fea9e1660fa2f782ea1d2828dae546ec238d9b2d2aeb7576145292","cross_cats_sorted":["hep-ex","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-ex","submitted_at":"2011-08-21T17:47:04Z","title_canon_sha256":"b5fcd0704ce136c643dc1106a2ea39ad849e76f13e6a58ee9113b28eaacdaa05"},"schema_version":"1.0","source":{"id":"1108.4193","kind":"arxiv","version":2}},"canonical_sha256":"8639147df14705e027f8631d60fa1c42030a0c59ae5633197368ab21bf92775e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8639147df14705e027f8631d60fa1c42030a0c59ae5633197368ab21bf92775e","first_computed_at":"2026-05-18T04:07:52.397638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:07:52.397638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+dflEJDnpkWCySedlBFvSfv65LBzk/mi2dfTQCf2ngaFdbBvIqAFoxNZH5k9ww7bbQhPa3brlXjnF7MLvsFKAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:07:52.398057Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.4193","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfdb8f7e242225b3e8eadc1a2467d0e06a64767b22a1991481fca60c8af6fab7","sha256:aee840de50c2583b21cc167f2313cef3485b82331fb56ed94cd845a19e9cfbed"],"state_sha256":"2a5689e8a7de84a581fc887aa98aae2ecf14bf9c1bcfca062b5385c8d79b280a"}