{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:GK3PQG6HCPLHDBXY5JLFQHIKDU","short_pith_number":"pith:GK3PQG6H","canonical_record":{"source":{"id":"1307.0026","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2013-06-28T20:48:39Z","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"title_canon_sha256":"af12b0b0a987e49e263155178aa466c1fa40b20f1d9db54ceaa6088dcfa52861","abstract_canon_sha256":"49681a443e0a9f13a19461d095854aec31a79bc1e436da534c2c865657884e10"},"schema_version":"1.0"},"canonical_sha256":"32b6f81bc713d67186f8ea56581d0a1d23aeb329732915a2e5ba7a0b5cd33e08","source":{"kind":"arxiv","id":"1307.0026","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0026","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0026v2","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0026","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"pith_short_12","alias_value":"GK3PQG6HCPLH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GK3PQG6HCPLHDBXY","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GK3PQG6H","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:GK3PQG6HCPLHDBXY5JLFQHIKDU","target":"record","payload":{"canonical_record":{"source":{"id":"1307.0026","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2013-06-28T20:48:39Z","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"title_canon_sha256":"af12b0b0a987e49e263155178aa466c1fa40b20f1d9db54ceaa6088dcfa52861","abstract_canon_sha256":"49681a443e0a9f13a19461d095854aec31a79bc1e436da534c2c865657884e10"},"schema_version":"1.0"},"canonical_sha256":"32b6f81bc713d67186f8ea56581d0a1d23aeb329732915a2e5ba7a0b5cd33e08","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:06.363135Z","signature_b64":"kOPpuJ3fEMeGqwioa+A9VzM80zvdnwJwLLLcKg/JidKqjk53HUqdJii+hbIBM5ta1lIyMkJHCpZej0cKvgB7Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"32b6f81bc713d67186f8ea56581d0a1d23aeb329732915a2e5ba7a0b5cd33e08","last_reissued_at":"2026-05-18T01:49:06.362566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:06.362566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.0026","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":"2026-05-18T01:49:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"USfBLVuuKKjY1K7mTp1VKr61SD3Eg6WF/y1HxBGUAOgroSzmMHWW1xj1Gpf6xslE6KHfjDkjfJKRUicjlolZCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:13:43.787368Z"},"content_sha256":"12b6a6065b4afe0eb106e7ec65946d728f88bdbee3247de0d384f2d24f6ede6a","schema_version":"1.0","event_id":"sha256:12b6a6065b4afe0eb106e7ec65946d728f88bdbee3247de0d384f2d24f6ede6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:GK3PQG6HCPLHDBXY5JLFQHIKDU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pion electromagnetic form factor at spacelike momenta","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-lat","hep-ph","nucl-ex"],"primary_cat":"nucl-th","authors_text":"C. D. Roberts, I. C. Cloet, L. Chang, P. C. Tandy, S. M. Schmidt","submitted_at":"2013-06-28T20:48:39Z","abstract_excerpt":"A novel method is employed to compute the pion electromagnetic form factor, F_\\pi(Q^2), on the entire domain of spacelike momentum transfer using the Dyson-Schwinger equation (DSE) framework in quantum chromodynamics (QCD). The DSE architecture unifies this prediction with that of the pion's valence-quark parton distribution amplitude (PDA). Using this PDA, the leading-order, leading-twist perturbative QCD result for Q^2 F_\\pi(Q^2) underestimates the full computation by just 15% on Q^2>~8GeV^2, in stark contrast with the result obtained using the asymptotic PDA. The analysis shows that hard co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0026","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":"2026-05-18T01:49:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p5kun+O+zBBhqmxT3ZKDanY4tyaDpRmzfo/VKJTiOofVeoNrX1+Qi423qzDgXoA0zkWmWj6u1FVZqZHMi/Q7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:13:43.787797Z"},"content_sha256":"0160cc7aa52c3f3cd3cf8e4e62b706e47e9815855815e01e271ca8afb533795c","schema_version":"1.0","event_id":"sha256:0160cc7aa52c3f3cd3cf8e4e62b706e47e9815855815e01e271ca8afb533795c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/bundle.json","state_url":"https://pith.science/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/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":"2026-05-26T19:13:43Z","links":{"resolver":"https://pith.science/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU","bundle":"https://pith.science/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/bundle.json","state":"https://pith.science/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GK3PQG6HCPLHDBXY5JLFQHIKDU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:GK3PQG6HCPLHDBXY5JLFQHIKDU","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":"49681a443e0a9f13a19461d095854aec31a79bc1e436da534c2c865657884e10","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2013-06-28T20:48:39Z","title_canon_sha256":"af12b0b0a987e49e263155178aa466c1fa40b20f1d9db54ceaa6088dcfa52861"},"schema_version":"1.0","source":{"id":"1307.0026","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0026","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0026v2","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0026","created_at":"2026-05-18T01:49:06Z"},{"alias_kind":"pith_short_12","alias_value":"GK3PQG6HCPLH","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"GK3PQG6HCPLHDBXY","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"GK3PQG6H","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:0160cc7aa52c3f3cd3cf8e4e62b706e47e9815855815e01e271ca8afb533795c","target":"graph","created_at":"2026-05-18T01:49:06Z","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":"A novel method is employed to compute the pion electromagnetic form factor, F_\\pi(Q^2), on the entire domain of spacelike momentum transfer using the Dyson-Schwinger equation (DSE) framework in quantum chromodynamics (QCD). The DSE architecture unifies this prediction with that of the pion's valence-quark parton distribution amplitude (PDA). Using this PDA, the leading-order, leading-twist perturbative QCD result for Q^2 F_\\pi(Q^2) underestimates the full computation by just 15% on Q^2>~8GeV^2, in stark contrast with the result obtained using the asymptotic PDA. The analysis shows that hard co","authors_text":"C. D. Roberts, I. C. Cloet, L. Chang, P. C. Tandy, S. M. Schmidt","cross_cats":["hep-lat","hep-ph","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2013-06-28T20:48:39Z","title":"Pion electromagnetic form factor at spacelike momenta"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0026","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":"sha256:12b6a6065b4afe0eb106e7ec65946d728f88bdbee3247de0d384f2d24f6ede6a","target":"record","created_at":"2026-05-18T01:49:06Z","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":"49681a443e0a9f13a19461d095854aec31a79bc1e436da534c2c865657884e10","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2013-06-28T20:48:39Z","title_canon_sha256":"af12b0b0a987e49e263155178aa466c1fa40b20f1d9db54ceaa6088dcfa52861"},"schema_version":"1.0","source":{"id":"1307.0026","kind":"arxiv","version":2}},"canonical_sha256":"32b6f81bc713d67186f8ea56581d0a1d23aeb329732915a2e5ba7a0b5cd33e08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"32b6f81bc713d67186f8ea56581d0a1d23aeb329732915a2e5ba7a0b5cd33e08","first_computed_at":"2026-05-18T01:49:06.362566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:06.362566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kOPpuJ3fEMeGqwioa+A9VzM80zvdnwJwLLLcKg/JidKqjk53HUqdJii+hbIBM5ta1lIyMkJHCpZej0cKvgB7Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:06.363135Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.0026","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12b6a6065b4afe0eb106e7ec65946d728f88bdbee3247de0d384f2d24f6ede6a","sha256:0160cc7aa52c3f3cd3cf8e4e62b706e47e9815855815e01e271ca8afb533795c"],"state_sha256":"e9cef84dbdf6a7bb5f608447ffc4ce30dccae2c29de4260a0ca927751258c4d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ZnQO1OSa2sLwRznBYoiZ2OKey0hL/wIHO2Zri7G5oi7G1KaKybMTtdcv8AuF2kRE3vXcd3eE8cbOHF2bnrTCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:13:43.790542Z","bundle_sha256":"f7af8388f3d5280c0bac115b73f2f5e5c98e398da34b389796a1cebd2054b3fc"}}