{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:CFCYRQKXV4ANYYXA5HVGTRD6UD","short_pith_number":"pith:CFCYRQKX","canonical_record":{"source":{"id":"2501.02983","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-01-06T12:49:34Z","cross_cats_sorted":[],"title_canon_sha256":"63bb02c6a8adbab985db1cd98c5e9ea8b8c283ba57bcaa253f92e165d44146dc","abstract_canon_sha256":"dbc03ac65625e66fb221b2932ede6ed57c20f450982958660cdc19160d4fd1da"},"schema_version":"1.0"},"canonical_sha256":"114588c157af00dc62e0e9ea69c47ea0c08392c79e015f10331b204b09b5aa93","source":{"kind":"arxiv","id":"2501.02983","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.02983","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.02983v1","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.02983","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_12","alias_value":"CFCYRQKXV4AN","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_16","alias_value":"CFCYRQKXV4ANYYXA","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_8","alias_value":"CFCYRQKX","created_at":"2026-07-05T09:57:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:CFCYRQKXV4ANYYXA5HVGTRD6UD","target":"record","payload":{"canonical_record":{"source":{"id":"2501.02983","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-01-06T12:49:34Z","cross_cats_sorted":[],"title_canon_sha256":"63bb02c6a8adbab985db1cd98c5e9ea8b8c283ba57bcaa253f92e165d44146dc","abstract_canon_sha256":"dbc03ac65625e66fb221b2932ede6ed57c20f450982958660cdc19160d4fd1da"},"schema_version":"1.0"},"canonical_sha256":"114588c157af00dc62e0e9ea69c47ea0c08392c79e015f10331b204b09b5aa93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:57:28.745504Z","signature_b64":"lm5dXbYIYge/qzlqZtgR5pHWgCnJ0z2q95COHMU64lF6mQRIgP58Eae1zlQOEoWzL0ux6P0JCNAmA6B7Gn6YBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"114588c157af00dc62e0e9ea69c47ea0c08392c79e015f10331b204b09b5aa93","last_reissued_at":"2026-07-05T09:57:28.744934Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:57:28.744934Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.02983","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:57:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fhvM7qjohlriYWwe7dU1t0OY4Ox/7FR/OHgSz8EKcMTUQOpw7c01VHfyi9n4bqXKCdU1JUuRigERlcmsVWFZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T09:13:19.145377Z"},"content_sha256":"3e54e771c8ecd6f486ce440c76dd4803529d190cf01e325828ed54e36cdfa69c","schema_version":"1.0","event_id":"sha256:3e54e771c8ecd6f486ce440c76dd4803529d190cf01e325828ed54e36cdfa69c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:CFCYRQKXV4ANYYXA5HVGTRD6UD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metrology in a two-electron atom: The ionization energy of metastable triplet helium ($\\mathbf{2\\,^3S}_\\mathbf{1}$)","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Fr\\'ed\\'eric Merkt, Gloria Clausen, Hansj\\\"urg Schmutz, Josef A. Agner, Kai Gamlin","submitted_at":"2025-01-06T12:49:34Z","abstract_excerpt":"Helium (He) is the ideal atom to perform tests of ab-initio calculations in two-electron systems that consider all known effects, including quantum-electrodynamics and nuclear-size contributions. Recent state-of-the-art calculations and measurements of energy intervals involving the He $2\\;^3S_1$ metastable state reveal discrepancies at the level of $7\\,\\sigma$ that require clarification both from the experimental and theoretical sides. We report on a new determination, with unprecedented accuracy, of the ionization energy $E_\\mathrm{I}\\,(2\\;^3S_1)$ of the $(1s)(2s)\\;^3S_1$ metastable state of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.02983","kind":"arxiv","version":1},"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/2501.02983/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":"2026-07-05T09:57:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vz1UywZMmc6+w38ERL5Jkq5rm33Crw/cwLkeYer3WLzVIhJ8PiV6D6fk10hHnmADwffYnroqHFbTF1iCaA+XBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T09:13:19.145879Z"},"content_sha256":"99da5263f0f8fcf0527c3ddac542d9c4776ef95692c072f7eb93f6109678bdd2","schema_version":"1.0","event_id":"sha256:99da5263f0f8fcf0527c3ddac542d9c4776ef95692c072f7eb93f6109678bdd2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/bundle.json","state_url":"https://pith.science/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/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":"2026-08-11T09:13:19Z","links":{"resolver":"https://pith.science/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD","bundle":"https://pith.science/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/bundle.json","state":"https://pith.science/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CFCYRQKXV4ANYYXA5HVGTRD6UD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:CFCYRQKXV4ANYYXA5HVGTRD6UD","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":"dbc03ac65625e66fb221b2932ede6ed57c20f450982958660cdc19160d4fd1da","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-01-06T12:49:34Z","title_canon_sha256":"63bb02c6a8adbab985db1cd98c5e9ea8b8c283ba57bcaa253f92e165d44146dc"},"schema_version":"1.0","source":{"id":"2501.02983","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.02983","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"arxiv_version","alias_value":"2501.02983v1","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.02983","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_12","alias_value":"CFCYRQKXV4AN","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_16","alias_value":"CFCYRQKXV4ANYYXA","created_at":"2026-07-05T09:57:28Z"},{"alias_kind":"pith_short_8","alias_value":"CFCYRQKX","created_at":"2026-07-05T09:57:28Z"}],"graph_snapshots":[{"event_id":"sha256:99da5263f0f8fcf0527c3ddac542d9c4776ef95692c072f7eb93f6109678bdd2","target":"graph","created_at":"2026-07-05T09:57:28Z","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/2501.02983/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Helium (He) is the ideal atom to perform tests of ab-initio calculations in two-electron systems that consider all known effects, including quantum-electrodynamics and nuclear-size contributions. Recent state-of-the-art calculations and measurements of energy intervals involving the He $2\\;^3S_1$ metastable state reveal discrepancies at the level of $7\\,\\sigma$ that require clarification both from the experimental and theoretical sides. We report on a new determination, with unprecedented accuracy, of the ionization energy $E_\\mathrm{I}\\,(2\\;^3S_1)$ of the $(1s)(2s)\\;^3S_1$ metastable state of","authors_text":"Fr\\'ed\\'eric Merkt, Gloria Clausen, Hansj\\\"urg Schmutz, Josef A. Agner, Kai Gamlin","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-01-06T12:49:34Z","title":"Metrology in a two-electron atom: The ionization energy of metastable triplet helium ($\\mathbf{2\\,^3S}_\\mathbf{1}$)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.02983","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":"sha256:3e54e771c8ecd6f486ce440c76dd4803529d190cf01e325828ed54e36cdfa69c","target":"record","created_at":"2026-07-05T09:57:28Z","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":"dbc03ac65625e66fb221b2932ede6ed57c20f450982958660cdc19160d4fd1da","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2025-01-06T12:49:34Z","title_canon_sha256":"63bb02c6a8adbab985db1cd98c5e9ea8b8c283ba57bcaa253f92e165d44146dc"},"schema_version":"1.0","source":{"id":"2501.02983","kind":"arxiv","version":1}},"canonical_sha256":"114588c157af00dc62e0e9ea69c47ea0c08392c79e015f10331b204b09b5aa93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"114588c157af00dc62e0e9ea69c47ea0c08392c79e015f10331b204b09b5aa93","first_computed_at":"2026-07-05T09:57:28.744934Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:57:28.744934Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lm5dXbYIYge/qzlqZtgR5pHWgCnJ0z2q95COHMU64lF6mQRIgP58Eae1zlQOEoWzL0ux6P0JCNAmA6B7Gn6YBA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:57:28.745504Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.02983","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e54e771c8ecd6f486ce440c76dd4803529d190cf01e325828ed54e36cdfa69c","sha256:99da5263f0f8fcf0527c3ddac542d9c4776ef95692c072f7eb93f6109678bdd2"],"state_sha256":"87b493d3b03fed71b29f70883b4fb9f53459dc04384dd84ae1eec2c0b0ae00c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F5B/IbM/UvOsJFTpbP5tPs8wWX+Yup2HnW17/JKUyScqhvtWwE+0o8PTwPa6Equ7qdupiPXSOFise2siF+/8Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T09:13:19.151948Z","bundle_sha256":"e7580f33a1ebda38d5a5bf1e5d52cc5e5fee90e4fc9eb878698e239dad8a19cb"}}