{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:5B526TUPSPJ2IVG46NY3H4L7DK","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":"0fe2a439a3dc912fc0acbebae332b9f75eadd409dd5220748d8de7c8133c6cde","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1999-10-12T19:49:07Z","title_canon_sha256":"69921266b049cb2d8ce4da612d8b5ee3d9abecff7cfa1a942cbe9d0db9e9323e"},"schema_version":"1.0","source":{"id":"nucl-th/9910033","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9910033","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9910033v1","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9910033","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"5B526TUPSPJ2","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"5B526TUPSPJ2IVG4","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"5B526TUP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:c1be5259273502bfaf1350f8b7bd213cf54e0180b54c358d354cd9356f8ca8dd","target":"graph","created_at":"2026-05-18T04:18:13Z","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 rainbow truncation of the quark Dyson-Schwinger equation is combined with the ladder Bethe-Salpeter equation for the dressed quark-photon vertex to study the low-momentum behavior of the pion electromagnetic form factor. With model gluon parameters previously fixed by the pion mass and decay constant, the pion charge radius $r_\\pi$ is found to be in excellent agreement with the data. When the often-used Ball-Chiu Ansatz is used to construct the quark-photon vertex directly from the quark propagator, less than half of $r_\\pi^2$ is generated. The remainder of $r^2_\\pi$ is seen to be attribut","authors_text":"P.C. Tandy (Kent State University), P. Maris","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1999-10-12T19:49:07Z","title":"The Quark-Photon Vertex and the Pion Charge Radius"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9910033","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":"sha256:2d3b1d2372b0f74db379a1b1fb495c4dc7db6a355aaa56411c001c060eb4d064","target":"record","created_at":"2026-05-18T04:18:13Z","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":"0fe2a439a3dc912fc0acbebae332b9f75eadd409dd5220748d8de7c8133c6cde","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1999-10-12T19:49:07Z","title_canon_sha256":"69921266b049cb2d8ce4da612d8b5ee3d9abecff7cfa1a942cbe9d0db9e9323e"},"schema_version":"1.0","source":{"id":"nucl-th/9910033","kind":"arxiv","version":1}},"canonical_sha256":"e87baf4e8f93d3a454dcf371b3f17f1a8b9678909076145fe970aa1ce19d20c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e87baf4e8f93d3a454dcf371b3f17f1a8b9678909076145fe970aa1ce19d20c9","first_computed_at":"2026-05-18T04:18:13.714601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:13.714601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HVY94xcVNDMUXwVJno1HEEGUxc106iekAwiPJhEOTLykgV58eH1J6FOTSAGjnnuVmZxXvAJDwXD95ST1/R3aAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:13.715391Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9910033","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d3b1d2372b0f74db379a1b1fb495c4dc7db6a355aaa56411c001c060eb4d064","sha256:c1be5259273502bfaf1350f8b7bd213cf54e0180b54c358d354cd9356f8ca8dd"],"state_sha256":"43ddd4c9d2668797dac332a196d69b70c74ad6846bdd4bbf5cd64c10267356a0"}