{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:IL5LTXFGBQVENHD2YQFCVOZA3V","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":"928318aa7292fba05b998cf02a51ead1bc150a0d517996a28bb69cf048139d8f","cross_cats_sorted":["hep-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-07-13T12:30:13Z","title_canon_sha256":"9fcb4a43bd52db306a909e56f317ad59bd11141ff20b7411b80993dc7dcea6cd"},"schema_version":"1.0","source":{"id":"2607.11476","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.11476","created_at":"2026-07-14T02:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"2607.11476v1","created_at":"2026-07-14T02:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.11476","created_at":"2026-07-14T02:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"IL5LTXFGBQVE","created_at":"2026-07-14T02:22:05Z"},{"alias_kind":"pith_short_16","alias_value":"IL5LTXFGBQVENHD2","created_at":"2026-07-14T02:22:05Z"},{"alias_kind":"pith_short_8","alias_value":"IL5LTXFG","created_at":"2026-07-14T02:22:05Z"}],"graph_snapshots":[{"event_id":"sha256:ae4d16b0d4646064c883bb347c130ca46cd617e5c1cc8c962c4d2a6094b7b2bf","target":"graph","created_at":"2026-07-14T02:22:05Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.11476/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Two-neutrino double electron capture is a rare nuclear decay where two electrons are simultaneously captured from the atomic shells and two neutrinos are emitted. We report on the first search for two-neutrino double electron capture in the $\\textit{KK}$- and $\\textit{KL}$-shells of $^{36}$Ar using the low-radioactivity liquid argon target from underground sources in the DarkSide-50 experiment. No statistically significant excess was observed with approximately 12 ton-day exposure of underground argon (UAr) and, taking into account the $^{36}$Ar isotopic abundance in UAr (0.007%), we set a lim","authors_text":"A. Caminata, A. Chepurnov, A. Ianni, A.K. Alton, A.L. Renshaw, A. Pocar, A. Sheshukov, A. Sotnikov, A. Vishneva, B. Bottino, B.R. Hackett, B. Vogelaar, C. Galbiati, C. Savarese, C. Yang, DarkSide-50 Collaboration: P. Agnes, D. D\\'iaz Mairena, D. Franco, D. Korablev, D. Sablone, E. Pantic, E. Paoloni, F. Dordei, F. Gabriele, F. Hubaut, F. Karpeshin, G. Batignani, G. Fiorillo, G.K. Giovanetti, G. Korga, G. Testera, G. Zuzel, H.O. Back, I.F.M. Albuquerque, I. Machulin, J. Maricic, K. Pelczar, L. Pandola, M. Ave Pernas, M. Cadeddu, M. Cadoni, M. Caravati, M. Carlini, M. Gromov, M. Gulino, M. Kuss, M. La Commara, M. Lai, M. Lissia, M. Morrocchi, M.M. Wojcik, M. Pallavicini, M. Razeti, M. Rescigno, M. Skorokhvatov, M. Wada, N. Canci, N. Cargioli, O. Lychagina, O. Samoylov, O. Smirnov, P. Musico, P. Pralavorio, R. Milincic, R. Santorelli, R. Tartaglia, S. Bussino, S. Chashin, S. Davini, S. De Cecco, S.M. Mari, S. Pordes, S. Sanfilippo, S. Stracka, S. Westerdale, T. Alexander, V. Ippolito, V. Pesudo, W.M. Bonivento, Y. Suvorov, Y. Wang","cross_cats":["hep-ex"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-07-13T12:30:13Z","title":"Search for two-neutrino double electron capture in $^{36}$Ar with the DarkSide-50 detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.11476","kind":"arxiv","version":1},"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:b479389fbb533191edd817bbe6c7486d2d130c9e71bf311481858bcc3fcbc41a","target":"record","created_at":"2026-07-14T02:22:05Z","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":"928318aa7292fba05b998cf02a51ead1bc150a0d517996a28bb69cf048139d8f","cross_cats_sorted":["hep-ex"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"nucl-ex","submitted_at":"2026-07-13T12:30:13Z","title_canon_sha256":"9fcb4a43bd52db306a909e56f317ad59bd11141ff20b7411b80993dc7dcea6cd"},"schema_version":"1.0","source":{"id":"2607.11476","kind":"arxiv","version":1}},"canonical_sha256":"42fab9dca60c2a469c7ac40a2abb20dd6b6925c4cb8d464ae612eeefcf81885b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42fab9dca60c2a469c7ac40a2abb20dd6b6925c4cb8d464ae612eeefcf81885b","first_computed_at":"2026-07-14T02:22:05.800519Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-14T02:22:05.800519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Apparvg7ulluKVVpfvxsPz+HGm28qX4bPGTuVZb44R7jZGE6FZDNzF+6BHapjfKpEZCl52tGABHm9sN+mwMzDw==","signature_status":"signed_v1","signed_at":"2026-07-14T02:22:05.801415Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.11476","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b479389fbb533191edd817bbe6c7486d2d130c9e71bf311481858bcc3fcbc41a","sha256:ae4d16b0d4646064c883bb347c130ca46cd617e5c1cc8c962c4d2a6094b7b2bf"],"state_sha256":"ab3816416d5b6fe2e901bb75ec729e577763093b31181ef40e1faec1e3721dc6"}