{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:USMDKUOAAENMER5BDIJUZUFLQV","short_pith_number":"pith:USMDKUOA","canonical_record":{"source":{"id":"2507.05278","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2025-07-04T08:09:45Z","cross_cats_sorted":["hep-ex","nucl-ex","physics.atom-ph"],"title_canon_sha256":"16ff508619d5fa2f2b4832e4659262726598fdd6859c7c793feb698bff55b294","abstract_canon_sha256":"293561878f28dab50ca3f487ab65d650d2acc50fae4e9c5275d22cf274bfe818"},"schema_version":"1.0"},"canonical_sha256":"a4983551c0011ac247a11a134cd0ab856c6cc6a25bc1ad55efcc2307a0372dfd","source":{"kind":"arxiv","id":"2507.05278","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.05278","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"arxiv_version","alias_value":"2507.05278v4","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.05278","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_12","alias_value":"USMDKUOAAENM","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_16","alias_value":"USMDKUOAAENMER5B","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_8","alias_value":"USMDKUOA","created_at":"2026-07-21T01:20:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:USMDKUOAAENMER5BDIJUZUFLQV","target":"record","payload":{"canonical_record":{"source":{"id":"2507.05278","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2025-07-04T08:09:45Z","cross_cats_sorted":["hep-ex","nucl-ex","physics.atom-ph"],"title_canon_sha256":"16ff508619d5fa2f2b4832e4659262726598fdd6859c7c793feb698bff55b294","abstract_canon_sha256":"293561878f28dab50ca3f487ab65d650d2acc50fae4e9c5275d22cf274bfe818"},"schema_version":"1.0"},"canonical_sha256":"a4983551c0011ac247a11a134cd0ab856c6cc6a25bc1ad55efcc2307a0372dfd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-21T01:20:34.718776Z","signature_b64":"d+f9RYi0cHHJ8H1iCdcDTMQFN6aU3jyTTtuDxTgT1/SRZ5v3ZjMYTsC+twGQ/sK1phBQH1gbq5/vhDejqjI9AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4983551c0011ac247a11a134cd0ab856c6cc6a25bc1ad55efcc2307a0372dfd","last_reissued_at":"2026-07-21T01:20:34.717688Z","signature_status":"signed_v1","first_computed_at":"2026-07-21T01:20:34.717688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.05278","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-21T01:20:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gvGfqx6QkY9xQLgBCs3AS1B2rHFSsy7eHKW2qZVrZCY0PmDlYgcY1lnMzAP0MTqgJu/w/eweuC738aQgfR3GCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:19:37.989307Z"},"content_sha256":"5b8b462abd85558732f0152af03cca8a5dcf31c72457547d62c73ec9da24e6f4","schema_version":"1.0","event_id":"sha256:5b8b462abd85558732f0152af03cca8a5dcf31c72457547d62c73ec9da24e6f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:USMDKUOAAENMER5BDIJUZUFLQV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Neutron EDM Experiment with an Advanced Ultracold Neutron Source at TRIUMF","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","nucl-ex","physics.atom-ph"],"primary_cat":"physics.ins-det","authors_text":"A. Brossard, A. Jaison, A. Zahra, B. Algohi, B. Jamieson, C. Davis, C. Marshall, D. Anthony, D. Fujimoto, D. Salazar, E. Korkmaz, E. Korobkina, E. Miller, G. Ichikawa, H.J. Ong, H.M. Shimizu, I. Tanihata, J. Chak, J. Malcolm, J. Mammei, J. Sato, J.W. Martin, K. Drury, K. Madison, K. Mishima, K. Qiao, L. Barr\\'on-Palos, M. Bradley, M. Gericke, M. Katotoka, M. Kitaguchi, M. Lavvaf, M. McCrea, M. Miller, M. Zhao, N. Lo, N. Yazdandoost, P. Giampa, P. Switzer, Q. Ye, R. Chiba, R. de Vries, R. Fujitani, R. Golub, R. Mammei, R. Patni, R. Picker, S. Imajo, S. Kawasaki, S. Longo, S. Sidhu, S. Stargardter, S. Vanbergen, T. Bui, T. Hepworth, T. Higuchi, T. Lindner, T. Mohammadi, T. Momose, T. Okamura, T. Shima, Tushar, W.D. Ramsay, W. Klassen, W. Rathnakela, W. Schreyer, W.T.H. van Oers, Y. Makida, Y. Watanabe, Z. Mao","submitted_at":"2025-07-04T08:09:45Z","abstract_excerpt":"The TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration has been developing a high-intensity ultracold neutron (UCN) source aimed at searching for the neutron electric dipole moment (EDM) with a sensitivity goal of $10^{-27}\\ e{\\rm cm}$. This article reports on recent progress in commissioning of the UCN source and in the development of the neutron EDM spectrometer. In its final configuration, the accelerator-driven super-thermal UCN source will enable a neutron EDM experiment with two orders of magnitude improved statistics compared to the current best experiment. Substantial progress in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.05278","kind":"arxiv","version":4},"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/2507.05278/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-21T01:20:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6pubPzdt+/heSRbaBQU+WwkOYCzcYoTTSWbQ0r0P3IF7GfB2aO99K8EBEsOnfNaWLj16OLIy3JTydnf3j+tHBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:19:37.989819Z"},"content_sha256":"061bb082665574b0ed6941a3b3df5c731824940503a9681f41b0f0e3a3edc0b4","schema_version":"1.0","event_id":"sha256:061bb082665574b0ed6941a3b3df5c731824940503a9681f41b0f0e3a3edc0b4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/USMDKUOAAENMER5BDIJUZUFLQV/bundle.json","state_url":"https://pith.science/pith/USMDKUOAAENMER5BDIJUZUFLQV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/USMDKUOAAENMER5BDIJUZUFLQV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-21T05:19:37Z","links":{"resolver":"https://pith.science/pith/USMDKUOAAENMER5BDIJUZUFLQV","bundle":"https://pith.science/pith/USMDKUOAAENMER5BDIJUZUFLQV/bundle.json","state":"https://pith.science/pith/USMDKUOAAENMER5BDIJUZUFLQV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/USMDKUOAAENMER5BDIJUZUFLQV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:USMDKUOAAENMER5BDIJUZUFLQV","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":"293561878f28dab50ca3f487ab65d650d2acc50fae4e9c5275d22cf274bfe818","cross_cats_sorted":["hep-ex","nucl-ex","physics.atom-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2025-07-04T08:09:45Z","title_canon_sha256":"16ff508619d5fa2f2b4832e4659262726598fdd6859c7c793feb698bff55b294"},"schema_version":"1.0","source":{"id":"2507.05278","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.05278","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"arxiv_version","alias_value":"2507.05278v4","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.05278","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_12","alias_value":"USMDKUOAAENM","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_16","alias_value":"USMDKUOAAENMER5B","created_at":"2026-07-21T01:20:34Z"},{"alias_kind":"pith_short_8","alias_value":"USMDKUOA","created_at":"2026-07-21T01:20:34Z"}],"graph_snapshots":[{"event_id":"sha256:061bb082665574b0ed6941a3b3df5c731824940503a9681f41b0f0e3a3edc0b4","target":"graph","created_at":"2026-07-21T01:20:34Z","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/2507.05278/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The TRIUMF Ultracold Advanced Neutron (TUCAN) collaboration has been developing a high-intensity ultracold neutron (UCN) source aimed at searching for the neutron electric dipole moment (EDM) with a sensitivity goal of $10^{-27}\\ e{\\rm cm}$. This article reports on recent progress in commissioning of the UCN source and in the development of the neutron EDM spectrometer. In its final configuration, the accelerator-driven super-thermal UCN source will enable a neutron EDM experiment with two orders of magnitude improved statistics compared to the current best experiment. Substantial progress in ","authors_text":"A. Brossard, A. Jaison, A. Zahra, B. Algohi, B. Jamieson, C. Davis, C. Marshall, D. Anthony, D. Fujimoto, D. Salazar, E. Korkmaz, E. Korobkina, E. Miller, G. Ichikawa, H.J. Ong, H.M. Shimizu, I. Tanihata, J. Chak, J. Malcolm, J. Mammei, J. Sato, J.W. Martin, K. Drury, K. Madison, K. Mishima, K. Qiao, L. Barr\\'on-Palos, M. Bradley, M. Gericke, M. Katotoka, M. Kitaguchi, M. Lavvaf, M. McCrea, M. Miller, M. Zhao, N. Lo, N. Yazdandoost, P. Giampa, P. Switzer, Q. Ye, R. Chiba, R. de Vries, R. Fujitani, R. Golub, R. Mammei, R. Patni, R. Picker, S. Imajo, S. Kawasaki, S. Longo, S. Sidhu, S. Stargardter, S. Vanbergen, T. Bui, T. Hepworth, T. Higuchi, T. Lindner, T. Mohammadi, T. Momose, T. Okamura, T. Shima, Tushar, W.D. Ramsay, W. Klassen, W. Rathnakela, W. Schreyer, W.T.H. van Oers, Y. Makida, Y. Watanabe, Z. Mao","cross_cats":["hep-ex","nucl-ex","physics.atom-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2025-07-04T08:09:45Z","title":"Neutron EDM Experiment with an Advanced Ultracold Neutron Source at TRIUMF"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.05278","kind":"arxiv","version":4},"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":"sha256:5b8b462abd85558732f0152af03cca8a5dcf31c72457547d62c73ec9da24e6f4","target":"record","created_at":"2026-07-21T01:20:34Z","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":"293561878f28dab50ca3f487ab65d650d2acc50fae4e9c5275d22cf274bfe818","cross_cats_sorted":["hep-ex","nucl-ex","physics.atom-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.ins-det","submitted_at":"2025-07-04T08:09:45Z","title_canon_sha256":"16ff508619d5fa2f2b4832e4659262726598fdd6859c7c793feb698bff55b294"},"schema_version":"1.0","source":{"id":"2507.05278","kind":"arxiv","version":4}},"canonical_sha256":"a4983551c0011ac247a11a134cd0ab856c6cc6a25bc1ad55efcc2307a0372dfd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4983551c0011ac247a11a134cd0ab856c6cc6a25bc1ad55efcc2307a0372dfd","first_computed_at":"2026-07-21T01:20:34.717688Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-21T01:20:34.717688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d+f9RYi0cHHJ8H1iCdcDTMQFN6aU3jyTTtuDxTgT1/SRZ5v3ZjMYTsC+twGQ/sK1phBQH1gbq5/vhDejqjI9AQ==","signature_status":"signed_v1","signed_at":"2026-07-21T01:20:34.718776Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.05278","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b8b462abd85558732f0152af03cca8a5dcf31c72457547d62c73ec9da24e6f4","sha256:061bb082665574b0ed6941a3b3df5c731824940503a9681f41b0f0e3a3edc0b4"],"state_sha256":"2304e2343f21d96180c0b07044e58738bb62047348875cea9b9dd85b65293cd8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CfU5Hkzi1pfkAeuvjXfgWRrEShDa4PCskoe6luy7x/bxh7q/yAQGJs+GswSp9XQNdKYgwh8OmbsBLHoRMMNfBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T05:19:37.993459Z","bundle_sha256":"66ae53d0510113d9f894f825a7629ec2f70913151d2faec8d591ae808a9d45bf"}}