{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:MUCXGVKFFU7YDGS6RF3CJF4ZCI","short_pith_number":"pith:MUCXGVKF","canonical_record":{"source":{"id":"1211.0703","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2012-11-04T16:34:35Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"8d516ec8b1e4d14c8d9a2595214429721c117833ca4b79d3f2e632de512037e3","abstract_canon_sha256":"35a768d4d5bb75383face53b977e7ab5bcdf48da0a0d3d6c77922a07c410c462"},"schema_version":"1.0"},"canonical_sha256":"65057355452d3f819a5e8976249799123182f0f4eaec91b2ca72b6e478888085","source":{"kind":"arxiv","id":"1211.0703","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.0703","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"arxiv_version","alias_value":"1211.0703v1","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.0703","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"pith_short_12","alias_value":"MUCXGVKFFU7Y","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MUCXGVKFFU7YDGS6","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MUCXGVKF","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:MUCXGVKFFU7YDGS6RF3CJF4ZCI","target":"record","payload":{"canonical_record":{"source":{"id":"1211.0703","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2012-11-04T16:34:35Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"8d516ec8b1e4d14c8d9a2595214429721c117833ca4b79d3f2e632de512037e3","abstract_canon_sha256":"35a768d4d5bb75383face53b977e7ab5bcdf48da0a0d3d6c77922a07c410c462"},"schema_version":"1.0"},"canonical_sha256":"65057355452d3f819a5e8976249799123182f0f4eaec91b2ca72b6e478888085","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:26.167579Z","signature_b64":"Z3NgS2FTGiF3Cc1IECPGGdEEsqluxGMSVSwRLFHiF4WEZKQR7+Qq+ilSoWOKi0Fn5mCw7tD4D1SHTtanama/Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65057355452d3f819a5e8976249799123182f0f4eaec91b2ca72b6e478888085","last_reissued_at":"2026-05-18T01:53:26.166873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:26.166873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.0703","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":"2026-05-18T01:53:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dAmlt8p5NSD4VMTbtVcaG+cqvTS3OzPjmTrRImG9mjXW/zWr+ysvpZqJllEOQ28lCwL2sNdEO+9wl2mmWs6BBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T14:27:33.074222Z"},"content_sha256":"bb14772891f2fe4177174c2766e283378c5c97bcebb97e1b11cad71f6e692257","schema_version":"1.0","event_id":"sha256:bb14772891f2fe4177174c2766e283378c5c97bcebb97e1b11cad71f6e692257"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:MUCXGVKFFU7YDGS6RF3CJF4ZCI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gauge-invariant theory of two-pion photo- and electro-production off the nucleon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-th","authors_text":"Helmut Haberzettl, Kanzo Nakayama, Yongseok Oh","submitted_at":"2012-11-04T16:34:35Z","abstract_excerpt":"A field-theoretical description of the photoproduction of two pions off the nucleon is presented that applies to real as well as virtual photons in the one-photon approximation. The Lorentz-covariant theory is complete at the level of all explicit Faddeev-type three-body final-state mechanisms of dressed interacting hadrons, including those of the nonlinear Dyson-Schwinger type. All electromagnetic currents are constructed to satisfy their respective (generalized) Ward-Takahashi identities and thus satisfy local gauge invariance as a matter of course. The Faddeev-type ordering structure result"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.0703","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":"2026-05-18T01:53:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MvvuQqlN7D2/fW6gkaLvLbVT2CjEPkihK470WkOQcDvKu8VSs+BiilKcLswzcoUaUi69ixaSFgDMVqQnNJdhAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T14:27:33.074643Z"},"content_sha256":"3296e09c2b1f015502efc38c076372c16a0f41a892383b6ab8200acde21b943d","schema_version":"1.0","event_id":"sha256:3296e09c2b1f015502efc38c076372c16a0f41a892383b6ab8200acde21b943d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/bundle.json","state_url":"https://pith.science/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/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":"2026-05-21T14:27:33Z","links":{"resolver":"https://pith.science/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI","bundle":"https://pith.science/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/bundle.json","state":"https://pith.science/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MUCXGVKFFU7YDGS6RF3CJF4ZCI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:MUCXGVKFFU7YDGS6RF3CJF4ZCI","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":"35a768d4d5bb75383face53b977e7ab5bcdf48da0a0d3d6c77922a07c410c462","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2012-11-04T16:34:35Z","title_canon_sha256":"8d516ec8b1e4d14c8d9a2595214429721c117833ca4b79d3f2e632de512037e3"},"schema_version":"1.0","source":{"id":"1211.0703","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.0703","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"arxiv_version","alias_value":"1211.0703v1","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.0703","created_at":"2026-05-18T01:53:26Z"},{"alias_kind":"pith_short_12","alias_value":"MUCXGVKFFU7Y","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"MUCXGVKFFU7YDGS6","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"MUCXGVKF","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:3296e09c2b1f015502efc38c076372c16a0f41a892383b6ab8200acde21b943d","target":"graph","created_at":"2026-05-18T01:53:26Z","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 field-theoretical description of the photoproduction of two pions off the nucleon is presented that applies to real as well as virtual photons in the one-photon approximation. The Lorentz-covariant theory is complete at the level of all explicit Faddeev-type three-body final-state mechanisms of dressed interacting hadrons, including those of the nonlinear Dyson-Schwinger type. All electromagnetic currents are constructed to satisfy their respective (generalized) Ward-Takahashi identities and thus satisfy local gauge invariance as a matter of course. The Faddeev-type ordering structure result","authors_text":"Helmut Haberzettl, Kanzo Nakayama, Yongseok Oh","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2012-11-04T16:34:35Z","title":"Gauge-invariant theory of two-pion photo- and electro-production off the nucleon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.0703","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:bb14772891f2fe4177174c2766e283378c5c97bcebb97e1b11cad71f6e692257","target":"record","created_at":"2026-05-18T01:53:26Z","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":"35a768d4d5bb75383face53b977e7ab5bcdf48da0a0d3d6c77922a07c410c462","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2012-11-04T16:34:35Z","title_canon_sha256":"8d516ec8b1e4d14c8d9a2595214429721c117833ca4b79d3f2e632de512037e3"},"schema_version":"1.0","source":{"id":"1211.0703","kind":"arxiv","version":1}},"canonical_sha256":"65057355452d3f819a5e8976249799123182f0f4eaec91b2ca72b6e478888085","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65057355452d3f819a5e8976249799123182f0f4eaec91b2ca72b6e478888085","first_computed_at":"2026-05-18T01:53:26.166873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:26.166873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z3NgS2FTGiF3Cc1IECPGGdEEsqluxGMSVSwRLFHiF4WEZKQR7+Qq+ilSoWOKi0Fn5mCw7tD4D1SHTtanama/Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:26.167579Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.0703","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb14772891f2fe4177174c2766e283378c5c97bcebb97e1b11cad71f6e692257","sha256:3296e09c2b1f015502efc38c076372c16a0f41a892383b6ab8200acde21b943d"],"state_sha256":"49fb2c06773e465df4a14e350e314fb6bfd67b4eeaa28c8f7f2fc15618035fa7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"go8ywsKyyIicsdgfiGvomQxj86icO2/x5I1W0xg7Nn1cGYrFwSCFRUfjoYOsV7ByEKupDX7kyfCMwywHEzlyAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T14:27:33.076765Z","bundle_sha256":"cd02d63973d2be8a9f680c8a13620284529d093a01fa414863890ee0ef029091"}}