{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WDEMYZQHOVEGKN5WUB6NCC3ZVJ","short_pith_number":"pith:WDEMYZQH","canonical_record":{"source":{"id":"1812.10574","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-12-26T23:33:39Z","cross_cats_sorted":[],"title_canon_sha256":"4154d3f221ece1147cde3c120b8919ace0f71e7295241806533c006ae850763a","abstract_canon_sha256":"eded64ebf1b05c9941783525327eb5795436341049de02ddd4ab9bb16e6027b0"},"schema_version":"1.0"},"canonical_sha256":"b0c8cc660775486537b6a07cd10b79aa6942d56745ae055e5da9ec6b27bb6bfa","source":{"kind":"arxiv","id":"1812.10574","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.10574","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.10574v1","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.10574","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"pith_short_12","alias_value":"WDEMYZQHOVEG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WDEMYZQHOVEGKN5W","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WDEMYZQH","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WDEMYZQHOVEGKN5WUB6NCC3ZVJ","target":"record","payload":{"canonical_record":{"source":{"id":"1812.10574","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-12-26T23:33:39Z","cross_cats_sorted":[],"title_canon_sha256":"4154d3f221ece1147cde3c120b8919ace0f71e7295241806533c006ae850763a","abstract_canon_sha256":"eded64ebf1b05c9941783525327eb5795436341049de02ddd4ab9bb16e6027b0"},"schema_version":"1.0"},"canonical_sha256":"b0c8cc660775486537b6a07cd10b79aa6942d56745ae055e5da9ec6b27bb6bfa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:20.626103Z","signature_b64":"UGmeiOrw2kxHD0fQp/8KKFe1NAFm/f4x9TmVhO8ugrWDeCsF4WZl/7HVk78T7w9665iw1T4fMDDdJaWkIxOBDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0c8cc660775486537b6a07cd10b79aa6942d56745ae055e5da9ec6b27bb6bfa","last_reissued_at":"2026-05-17T23:57:20.625395Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:20.625395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.10574","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":"2026-05-17T23:57:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mwNBLYfqraTQ3Adh0P6ro+9XumZaqkuzRv5AStemVMqoFrG2nhHKDeLMtjmQIkJRa0mA9UQRoKLlDRXubQwtBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:32:27.628044Z"},"content_sha256":"b0faa55746a0f2a48e3555b944eb0f43c28934074fda4c9c266d65a56ff80ad0","schema_version":"1.0","event_id":"sha256:b0faa55746a0f2a48e3555b944eb0f43c28934074fda4c9c266d65a56ff80ad0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WDEMYZQHOVEGKN5WUB6NCC3ZVJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Systematics in nucleon matrix element calculations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-lat","authors_text":"Jeremy Green","submitted_at":"2018-12-26T23:33:39Z","abstract_excerpt":"The current status of calculations of simple nucleon structure observables is reviewed, with a focus on the axial charge. A major challenge is the combination of an exponentially decaying signal-to-noise ratio and the need for large source-sink separations to eliminate excited-state contributions; efforts to understand and deal with this problem are the focus of the largest section of this review. Finite-volume effects and chiral extrapolation are also briefly discussed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.10574","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":""},"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":"2026-05-17T23:57:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LCXQyQ4NWhhH5a4SkT5v+OrTLz0ot5nxu7l8zvwuiZAhyPK/iMOH6nXK7YDsNgUDAVVeefQXh5tPBGYecRS8Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:32:27.628633Z"},"content_sha256":"a1d05f208311f977f19d64a68f7ad6b241aa7635813b25203d99f699a00192f1","schema_version":"1.0","event_id":"sha256:a1d05f208311f977f19d64a68f7ad6b241aa7635813b25203d99f699a00192f1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/bundle.json","state_url":"https://pith.science/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/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":"2026-05-28T03:32:27Z","links":{"resolver":"https://pith.science/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ","bundle":"https://pith.science/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/bundle.json","state":"https://pith.science/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WDEMYZQHOVEGKN5WUB6NCC3ZVJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WDEMYZQHOVEGKN5WUB6NCC3ZVJ","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":"eded64ebf1b05c9941783525327eb5795436341049de02ddd4ab9bb16e6027b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-12-26T23:33:39Z","title_canon_sha256":"4154d3f221ece1147cde3c120b8919ace0f71e7295241806533c006ae850763a"},"schema_version":"1.0","source":{"id":"1812.10574","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.10574","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.10574v1","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.10574","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"pith_short_12","alias_value":"WDEMYZQHOVEG","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WDEMYZQHOVEGKN5W","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WDEMYZQH","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:a1d05f208311f977f19d64a68f7ad6b241aa7635813b25203d99f699a00192f1","target":"graph","created_at":"2026-05-17T23:57:20Z","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 current status of calculations of simple nucleon structure observables is reviewed, with a focus on the axial charge. A major challenge is the combination of an exponentially decaying signal-to-noise ratio and the need for large source-sink separations to eliminate excited-state contributions; efforts to understand and deal with this problem are the focus of the largest section of this review. Finite-volume effects and chiral extrapolation are also briefly discussed.","authors_text":"Jeremy Green","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-12-26T23:33:39Z","title":"Systematics in nucleon matrix element calculations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.10574","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:b0faa55746a0f2a48e3555b944eb0f43c28934074fda4c9c266d65a56ff80ad0","target":"record","created_at":"2026-05-17T23:57:20Z","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":"eded64ebf1b05c9941783525327eb5795436341049de02ddd4ab9bb16e6027b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-lat","submitted_at":"2018-12-26T23:33:39Z","title_canon_sha256":"4154d3f221ece1147cde3c120b8919ace0f71e7295241806533c006ae850763a"},"schema_version":"1.0","source":{"id":"1812.10574","kind":"arxiv","version":1}},"canonical_sha256":"b0c8cc660775486537b6a07cd10b79aa6942d56745ae055e5da9ec6b27bb6bfa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b0c8cc660775486537b6a07cd10b79aa6942d56745ae055e5da9ec6b27bb6bfa","first_computed_at":"2026-05-17T23:57:20.625395Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:20.625395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UGmeiOrw2kxHD0fQp/8KKFe1NAFm/f4x9TmVhO8ugrWDeCsF4WZl/7HVk78T7w9665iw1T4fMDDdJaWkIxOBDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:20.626103Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.10574","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b0faa55746a0f2a48e3555b944eb0f43c28934074fda4c9c266d65a56ff80ad0","sha256:a1d05f208311f977f19d64a68f7ad6b241aa7635813b25203d99f699a00192f1"],"state_sha256":"585e426fcf9d587f92d765947fafb6559fceb00a517199537cd0bcb18f97c9c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C1mwJb6TGr1noR9Yzmvgu06P+Tmgnw7byRYuPsIxXaZ9oJidcgmntDVYNpR+G4UFwvFdGdLkjRzDbBmTfAXcBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:32:27.631525Z","bundle_sha256":"07f3c1892e59d27c07c265b7f97486379f87f10ab539ec6de8426206c5e89f89"}}