{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:7YGQ3TIGLU7W6AGVC7D76TDANT","short_pith_number":"pith:7YGQ3TIG","canonical_record":{"source":{"id":"1001.5116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-01-28T07:43:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae6c920644db5379fa8dd3017cc7dd0cf0a57d99d6481ed08216a669b6f239a2","abstract_canon_sha256":"70464b7a44e138285a8998d8d0a4cd95f36dbac5c821c64140f3cd9ffb70fb6f"},"schema_version":"1.0"},"canonical_sha256":"fe0d0dcd065d3f6f00d517c7ff4c606cfcb50439985362c4a33e87e8cb4898df","source":{"kind":"arxiv","id":"1001.5116","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5116","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5116v2","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5116","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"pith_short_12","alias_value":"7YGQ3TIGLU7W","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"7YGQ3TIGLU7W6AGV","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"7YGQ3TIG","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:7YGQ3TIGLU7W6AGVC7D76TDANT","target":"record","payload":{"canonical_record":{"source":{"id":"1001.5116","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-01-28T07:43:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae6c920644db5379fa8dd3017cc7dd0cf0a57d99d6481ed08216a669b6f239a2","abstract_canon_sha256":"70464b7a44e138285a8998d8d0a4cd95f36dbac5c821c64140f3cd9ffb70fb6f"},"schema_version":"1.0"},"canonical_sha256":"fe0d0dcd065d3f6f00d517c7ff4c606cfcb50439985362c4a33e87e8cb4898df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:28.919249Z","signature_b64":"iIzEXBqvBvK1R7connL0HPOisvXas4NC20rSapzAwiOaXq3ILfOY1NtVlWZ8VwnLRrxuSTEWe87ZWBmalpSXAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe0d0dcd065d3f6f00d517c7ff4c606cfcb50439985362c4a33e87e8cb4898df","last_reissued_at":"2026-05-18T02:09:28.918839Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:28.918839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.5116","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tEnsAgfPtivOvFT6eR658DhTE19I2uL+z4ov1hxE6HMPFsKlSi1YFyaaj2f+ubOTS/9XIEnHotCZHYFjal/yDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T19:43:44.276769Z"},"content_sha256":"871f2f66617c52c1713cf62bb763b8d2676b13662110938b6ec096e386ad7372","schema_version":"1.0","event_id":"sha256:871f2f66617c52c1713cf62bb763b8d2676b13662110938b6ec096e386ad7372"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:7YGQ3TIGLU7W6AGVC7D76TDANT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fine structure of helium-like ions and determination of the fine structure constant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Krzysztof Pachucki, Vladimir A. Yerokhin","submitted_at":"2010-01-28T07:43:43Z","abstract_excerpt":"We report a calculation of the fine structure splitting in light helium-like atoms, which accounts for all quantum electrodynamical effects up to order \\alpha^5 Ry. For the helium atom, we resolve the previously reported disagreement between theory and experiment and determine the fine structure constant with an accuracy of 31 ppb. The calculational results are extensively checked by comparison with the experimental data for different nuclear charges and by evaluation of the hydrogenic limit of individual corrections."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5116","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T02:09:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WE38qVs4uPAhC9JGBgse3qxVH4ybK2ba+r33TY/OEJ2i6zB0YEyPoa8QTHZOpkFhLxtH0JCGrK7tW/cJUIqQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T19:43:44.277470Z"},"content_sha256":"0191097d054901eb8f95b12c445b915e750540c71d342f5e564ba68e38be2fbe","schema_version":"1.0","event_id":"sha256:0191097d054901eb8f95b12c445b915e750540c71d342f5e564ba68e38be2fbe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/bundle.json","state_url":"https://pith.science/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/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":"2026-06-05T19:43:44Z","links":{"resolver":"https://pith.science/pith/7YGQ3TIGLU7W6AGVC7D76TDANT","bundle":"https://pith.science/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/bundle.json","state":"https://pith.science/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7YGQ3TIGLU7W6AGVC7D76TDANT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:7YGQ3TIGLU7W6AGVC7D76TDANT","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":"70464b7a44e138285a8998d8d0a4cd95f36dbac5c821c64140f3cd9ffb70fb6f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-01-28T07:43:43Z","title_canon_sha256":"ae6c920644db5379fa8dd3017cc7dd0cf0a57d99d6481ed08216a669b6f239a2"},"schema_version":"1.0","source":{"id":"1001.5116","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5116","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5116v2","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5116","created_at":"2026-05-18T02:09:28Z"},{"alias_kind":"pith_short_12","alias_value":"7YGQ3TIGLU7W","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"7YGQ3TIGLU7W6AGV","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"7YGQ3TIG","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:0191097d054901eb8f95b12c445b915e750540c71d342f5e564ba68e38be2fbe","target":"graph","created_at":"2026-05-18T02:09:28Z","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"},"paper":{"abstract_excerpt":"We report a calculation of the fine structure splitting in light helium-like atoms, which accounts for all quantum electrodynamical effects up to order \\alpha^5 Ry. For the helium atom, we resolve the previously reported disagreement between theory and experiment and determine the fine structure constant with an accuracy of 31 ppb. The calculational results are extensively checked by comparison with the experimental data for different nuclear charges and by evaluation of the hydrogenic limit of individual corrections.","authors_text":"Krzysztof Pachucki, Vladimir A. Yerokhin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-01-28T07:43:43Z","title":"Fine structure of helium-like ions and determination of the fine structure constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5116","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":"sha256:871f2f66617c52c1713cf62bb763b8d2676b13662110938b6ec096e386ad7372","target":"record","created_at":"2026-05-18T02:09:28Z","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":"70464b7a44e138285a8998d8d0a4cd95f36dbac5c821c64140f3cd9ffb70fb6f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-01-28T07:43:43Z","title_canon_sha256":"ae6c920644db5379fa8dd3017cc7dd0cf0a57d99d6481ed08216a669b6f239a2"},"schema_version":"1.0","source":{"id":"1001.5116","kind":"arxiv","version":2}},"canonical_sha256":"fe0d0dcd065d3f6f00d517c7ff4c606cfcb50439985362c4a33e87e8cb4898df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe0d0dcd065d3f6f00d517c7ff4c606cfcb50439985362c4a33e87e8cb4898df","first_computed_at":"2026-05-18T02:09:28.918839Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:28.918839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iIzEXBqvBvK1R7connL0HPOisvXas4NC20rSapzAwiOaXq3ILfOY1NtVlWZ8VwnLRrxuSTEWe87ZWBmalpSXAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:28.919249Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.5116","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:871f2f66617c52c1713cf62bb763b8d2676b13662110938b6ec096e386ad7372","sha256:0191097d054901eb8f95b12c445b915e750540c71d342f5e564ba68e38be2fbe"],"state_sha256":"8a3d64717fd3219048881dddbd8da913ff5cf35d4f3f3bdd0e77ab75be438b52"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JDrmpMQ6slNRFd394lnc/ZF2z2BJZ/tg3p2iiO2GO+EQZnCvpBZiD0QKLwVTSgp9HFgb8F3hMeDR3kPRuM6gCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T19:43:44.281962Z","bundle_sha256":"8db1fbe9176a4ae439e8b241a11b80094ef7c933296ba8779cd9c783d02099cd"}}