{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4PAEEQ56TNGMFPNS6QRLP4T4JF","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":"f7caf851c89beec33f200c0d19f2bc7f931ca2223f45614e923e5b3b6ea781cb","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-02-20T16:54:58Z","title_canon_sha256":"29721d36f4de0fba059a90d9e67ea04a2a69814fddb4ac68ce119ee5eaf6d8c4"},"schema_version":"1.0","source":{"id":"1802.07198","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.07198","created_at":"2026-05-18T00:00:21Z"},{"alias_kind":"arxiv_version","alias_value":"1802.07198v3","created_at":"2026-05-18T00:00:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.07198","created_at":"2026-05-18T00:00:21Z"},{"alias_kind":"pith_short_12","alias_value":"4PAEEQ56TNGM","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4PAEEQ56TNGMFPNS","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4PAEEQ56","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:b25bff6561827389899eb9aec882f6985d824ff238e1bc38907304b1a07f65f2","target":"graph","created_at":"2026-05-18T00:00:21Z","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":"The DarkSide-50 direct-detection dark matter experiment is a dual-phase argon time projection chamber operating at Laboratori Nazionali del Gran Sasso. This paper reports on the blind analysis of a (16,660+-270) kg d exposure using a target of low-radioactivity argon extracted from underground sources. We find no events in the dark matter selection box and set a 90% C.L. upper limit on the dark matter-nucleon spin-independent cross section of 1.14E-44 cm^2 (3.78E-44 cm^2, 3.43E-43 cm^2) for a WIMP mass of 100 GeV/c^2 (1 TeV/c^2, 10 TeV/c^2).","authors_text":"A. A. Machado, A. Caminata, A. Candela, A. Chepurnov, A. De Candia, A. Devoto, A. Empl, A. Fan, A. G. Cocco, A. K. Alton, A. Kubankin, A. L. Renshaw, A. Mandarano, A. Messina, A. M. Goretti, A. Monte, A. Navrer Agasson, An. Ianni, A. Oleinik, A. O. Nozdrina, A. Pocar, A. Razeto, A. Romani, A. Shchagin, A. Sheshukov, A. Sotnikov, A. Tonazzo, A. V. Derbin, A. Vishneva, A. W. Watson, B. Baldin, B. Bottino, B. Hosseini, B. J. Mount, B. Reinhold, B. R. Hackett, B. Rossi, B. Schlitzer, B. Vogelaar, C. Cical\\`o, C. Dionisi, C. Galbiati, C. Ghiano, C. Giganti, C. J. Martoff, C. L. Kendziora, C. Savarese, C. Stanford, C. Yang, C. Zhu, D. A. Pugachev, D. A. Semenov, D. D'Angelo, D. D'Urso, D. Franco, D. Hughes, D. Korablev, D. Sablone, E. Edkins, E. Pantic, E. Paoloni, E. Segreto, E. V. Hungerford, E. V. Unzhakov, F. Budano, F. Calaprice, F. Di Eusanio, F. Gabriele, F. Granato, F. Ortica, F. Ragusa, G. Batignani, G. Bonfini, G. Covone, G. De Filippis, G. De Rosa, G. Di Pietro, G. Fiorillo, G. K. Giovanetti, G. Koh, G. Korga, G. Longo, G. R. Araujo, G. Testera, G. Zuzel, H. O. Back, H. Qian, H. Wang, I. F. M. Albuquerque, I. James, I. Kochanek, I. N. Machulin, J. Maricic, K. Biery, K. Fomenko, K. Herner, K. Keeter, K. Pelczar, L. Mapelli, L. Pagani, L. Pandola, M. Ave, M. Cadeddu, M. Cadoni, M. Caravati, M. Cariello, M. Carlini, M. Carpinelli, M. De Deo, M. De Vincenzi, M. D'Incecco, M. Downing, M. D. Skorokhvatov, M. Gromov, M. Guan, M. Gulino, M. Kuss, M. La Commara, M. Lai, M. Lissia, M. Morrocchi, M. M. Wojcik, M. Orsini, M. Pallavicini, M. Razeti, M. Rescigno, M. Verducci, M. Wada, N. Canci, N. Pelliccia, N. Rossi, O. Gorchakov, O. Samoylov, O. Smirnov, P. Cavalcante, P. D. Meyers, P. Humble, P. Musico, P. N. Singh, P. Trinchese, Q. Riffard, R. Milincic, R. S. Fitzpatrick, R. Tartaglia, S. Bussino, S. Catalanotti, S. Cavuoti, S. Davini, S. De Cecco, S. Giagu, S. M. Mari, S. Pordes, S. Sanfilippo, S. S. Poudel, S. Stracka, S. Westerdale, T. Alexander, The DarkSide Collaboration: P. Agnes, T. J. Waldrop, T. N. Johnson, V. Bocci, V. Cataudella, V. Ippolito, V. N. Muratova, W. Bonivento, W. Sands, X. Li, X. Xiang, X. Xiao, Y. Guardincerri, Y. Ma, Y. Suvorov, Y. Wang, Z. Ye","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-02-20T16:54:58Z","title":"DarkSide-50 532-day Dark Matter Search with Low-Radioactivity Argon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.07198","kind":"arxiv","version":3},"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":"sha256:613b4d5cffaa6185d2a2cafe26539461156e764e235c36151af3c86c5af7d961","target":"record","created_at":"2026-05-18T00:00:21Z","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":"f7caf851c89beec33f200c0d19f2bc7f931ca2223f45614e923e5b3b6ea781cb","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-02-20T16:54:58Z","title_canon_sha256":"29721d36f4de0fba059a90d9e67ea04a2a69814fddb4ac68ce119ee5eaf6d8c4"},"schema_version":"1.0","source":{"id":"1802.07198","kind":"arxiv","version":3}},"canonical_sha256":"e3c04243be9b4cc2bdb2f422b7f27c494604a2293b04e36012ad459b11e53838","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3c04243be9b4cc2bdb2f422b7f27c494604a2293b04e36012ad459b11e53838","first_computed_at":"2026-05-18T00:00:21.925581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:21.925581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RBXk0dh2XzbECX3DdQ+pyCC0YslR6FpqlROR2qyzwOxyJ0BkTdt2hLkIg8GrVFTOXSoU8V0FVzw+aSte/dM/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:21.926341Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.07198","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:613b4d5cffaa6185d2a2cafe26539461156e764e235c36151af3c86c5af7d961","sha256:b25bff6561827389899eb9aec882f6985d824ff238e1bc38907304b1a07f65f2"],"state_sha256":"5f21c7661af66761d5e84e90c14a22dcdabd5caa46e05c536f880dadda41c2a4"}