{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:26VJNSONODNFYP62DHVE5PNIHA","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":"e0fefaeb54ef9afa2baf5d4557a1b4d931d32c67249b86997e915d0146cf8202","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-02-09T21:01:54Z","title_canon_sha256":"e75b69baa3b8545130eaefe7045123a402fdfc752b324f0d2288761d9adb3977"},"schema_version":"1.0","source":{"id":"1002.1968","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1968","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1968v1","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1968","created_at":"2026-05-18T04:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"26VJNSONODNF","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"26VJNSONODNFYP62","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"26VJNSON","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:7495cf02f4a7f4593472fcc8fe60bce8f41c514283e5f79690148f8685bfb45f","target":"graph","created_at":"2026-05-18T04:36:33Z","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":"In a Poincare'-covariant vector-boson-exchange theory, the pion possesses components of pseudovector origin, which materially influence its observable properties. For a range of such quantities, we explore the consequences of a momentum-independent interaction, regularised in a symmetry-preserving manner. The contact interaction, whilst capable of describing pion static properties, produces a form factor whose: evolution for Q^2>0.17GeV^2 disagrees markedly with experiment; and asymptotic power-law behaviour conflicts strongly with perturbative-QCD.","authors_text":"A. Bashir, C. D. Roberts, I. C. Cloet, L. X. Gutierrez-Guerrero","cross_cats":["hep-lat","hep-ph","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-02-09T21:01:54Z","title":"Pion form factor from a contact interaction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1968","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:d4e09ac276e92a5dcc336d52a427a20283f0b82db8645d722a47b9982d4dabb9","target":"record","created_at":"2026-05-18T04:36:33Z","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":"e0fefaeb54ef9afa2baf5d4557a1b4d931d32c67249b86997e915d0146cf8202","cross_cats_sorted":["hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2010-02-09T21:01:54Z","title_canon_sha256":"e75b69baa3b8545130eaefe7045123a402fdfc752b324f0d2288761d9adb3977"},"schema_version":"1.0","source":{"id":"1002.1968","kind":"arxiv","version":1}},"canonical_sha256":"d7aa96c9cd70da5c3fda19ea4ebda838123d1f72ca63bd10c77860ed9494cf08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7aa96c9cd70da5c3fda19ea4ebda838123d1f72ca63bd10c77860ed9494cf08","first_computed_at":"2026-05-18T04:36:33.884122Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:33.884122Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XKJpMBcxzZ5f6Ex4UgH4xZptfZn1V2mv+Gx0QUfuYH3449ufSAnHivCPH/KAi1gc6c/UCeYpaMHHx07SbxPeCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:33.884511Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.1968","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4e09ac276e92a5dcc336d52a427a20283f0b82db8645d722a47b9982d4dabb9","sha256:7495cf02f4a7f4593472fcc8fe60bce8f41c514283e5f79690148f8685bfb45f"],"state_sha256":"0de246affc11cacac0a237abac9b6842518a89d63a202e7ef074ccafe6fe0aea"}