{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:LAAMEDRHL6CQ7UZBUSGDGMEP5M","short_pith_number":"pith:LAAMEDRH","canonical_record":{"source":{"id":"hep-ph/0309011","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-01T14:57:00Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"515884e56a9217f6f0b7a7ccd2ea7d9592d34c99d673bacf52b4a0b3b2800d93","abstract_canon_sha256":"fdba58381dcf8584ebd1dae7411d33b1a73d43410571a9e3fb9ff733784260a0"},"schema_version":"1.0"},"canonical_sha256":"5800c20e275f850fd321a48c33308feb3b514f56687d277b9a93e12eacec853a","source":{"kind":"arxiv","id":"hep-ph/0309011","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0309011","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0309011v2","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0309011","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"pith_short_12","alias_value":"LAAMEDRHL6CQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"LAAMEDRHL6CQ7UZB","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"LAAMEDRH","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:LAAMEDRHL6CQ7UZBUSGDGMEP5M","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/0309011","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-01T14:57:00Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"515884e56a9217f6f0b7a7ccd2ea7d9592d34c99d673bacf52b4a0b3b2800d93","abstract_canon_sha256":"fdba58381dcf8584ebd1dae7411d33b1a73d43410571a9e3fb9ff733784260a0"},"schema_version":"1.0"},"canonical_sha256":"5800c20e275f850fd321a48c33308feb3b514f56687d277b9a93e12eacec853a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:36:30.409356Z","signature_b64":"c2jhubdaRCcHTY3zmUdDMOx3zbpNHGd/IDvqhaS1+VMvRSmg4E/5ySYbUScLo/1d5ll03zYq117aZpUNvsM5AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5800c20e275f850fd321a48c33308feb3b514f56687d277b9a93e12eacec853a","last_reissued_at":"2026-05-18T02:36:30.408786Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:36:30.408786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/0309011","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":"2026-05-18T02:36:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"44yozdRk0Hn0Si3HhiLlX6MnYCB5kiYCd4nGNA7VhR3Apo2R/1ihz5woAKYWxmFZI/ADDArMcJ0at7vDGqc6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T10:17:34.064807Z"},"content_sha256":"9414990c02afd63adda2f6b57691658b0f897c5f05779660e709a2dd896c7254","schema_version":"1.0","event_id":"sha256:9414990c02afd63adda2f6b57691658b0f897c5f05779660e709a2dd896c7254"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:LAAMEDRHL6CQ7UZBUSGDGMEP5M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-photon decays of pi^0, eta and eta-prime","license":"","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"B. Borasoy, R. Nissler","submitted_at":"2003-09-01T14:57:00Z","abstract_excerpt":"We investigate the decays of pi^0, eta and eta-prime into two photons in an effective U(3) chiral Lagrangian approach without employing large N_c arguments. Tree level and one-loop contributions from the anomalous Wess-Zumino-Witten Lagrangian are calculated and the importance of eta--eta-prime mixing is discussed. Unitarity corrections beyond one-loop play an important role for the decays with off-shell photons and are included by employing a coupled channel Bethe-Salpeter equation which satisfies unitarity constraints and generates vector-mesons from composed states of two pseudoscalar meson"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0309011","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":"2026-05-18T02:36:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BFo1a8lSbUaIo6BSXiUygIRIcxA+6OHZogjpYu7vvLEp9qo8BWQVXmEGz1o9XvbIu0MWH05v3aZQU0blCU0dAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T10:17:34.065254Z"},"content_sha256":"3b3d299e13dffb5afd5a03c836088d0a7dcf6d5167e0ed6de57341a70af1181c","schema_version":"1.0","event_id":"sha256:3b3d299e13dffb5afd5a03c836088d0a7dcf6d5167e0ed6de57341a70af1181c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/bundle.json","state_url":"https://pith.science/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/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":"2026-06-28T10:17:34Z","links":{"resolver":"https://pith.science/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M","bundle":"https://pith.science/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/bundle.json","state":"https://pith.science/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LAAMEDRHL6CQ7UZBUSGDGMEP5M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:LAAMEDRHL6CQ7UZBUSGDGMEP5M","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":"fdba58381dcf8584ebd1dae7411d33b1a73d43410571a9e3fb9ff733784260a0","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-01T14:57:00Z","title_canon_sha256":"515884e56a9217f6f0b7a7ccd2ea7d9592d34c99d673bacf52b4a0b3b2800d93"},"schema_version":"1.0","source":{"id":"hep-ph/0309011","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0309011","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0309011v2","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0309011","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"pith_short_12","alias_value":"LAAMEDRHL6CQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"LAAMEDRHL6CQ7UZB","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"LAAMEDRH","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:3b3d299e13dffb5afd5a03c836088d0a7dcf6d5167e0ed6de57341a70af1181c","target":"graph","created_at":"2026-05-18T02:36:30Z","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":"We investigate the decays of pi^0, eta and eta-prime into two photons in an effective U(3) chiral Lagrangian approach without employing large N_c arguments. Tree level and one-loop contributions from the anomalous Wess-Zumino-Witten Lagrangian are calculated and the importance of eta--eta-prime mixing is discussed. Unitarity corrections beyond one-loop play an important role for the decays with off-shell photons and are included by employing a coupled channel Bethe-Salpeter equation which satisfies unitarity constraints and generates vector-mesons from composed states of two pseudoscalar meson","authors_text":"B. Borasoy, R. Nissler","cross_cats":["nucl-th"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2003-09-01T14:57:00Z","title":"Two-photon decays of pi^0, eta and eta-prime"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0309011","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":"sha256:9414990c02afd63adda2f6b57691658b0f897c5f05779660e709a2dd896c7254","target":"record","created_at":"2026-05-18T02:36:30Z","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":"fdba58381dcf8584ebd1dae7411d33b1a73d43410571a9e3fb9ff733784260a0","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-01T14:57:00Z","title_canon_sha256":"515884e56a9217f6f0b7a7ccd2ea7d9592d34c99d673bacf52b4a0b3b2800d93"},"schema_version":"1.0","source":{"id":"hep-ph/0309011","kind":"arxiv","version":2}},"canonical_sha256":"5800c20e275f850fd321a48c33308feb3b514f56687d277b9a93e12eacec853a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5800c20e275f850fd321a48c33308feb3b514f56687d277b9a93e12eacec853a","first_computed_at":"2026-05-18T02:36:30.408786Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:36:30.408786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c2jhubdaRCcHTY3zmUdDMOx3zbpNHGd/IDvqhaS1+VMvRSmg4E/5ySYbUScLo/1d5ll03zYq117aZpUNvsM5AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:36:30.409356Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0309011","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9414990c02afd63adda2f6b57691658b0f897c5f05779660e709a2dd896c7254","sha256:3b3d299e13dffb5afd5a03c836088d0a7dcf6d5167e0ed6de57341a70af1181c"],"state_sha256":"eb32b5f16e0e20b51211c0e4d7f865b6a875b50fa10bbb79a529afc0fbe41122"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+9YwDaQ9dsHWqHTlGnXldRW8VP2XxQRD17L8Zts+rdo76ae6cPnJhZ8WHRH4QYrpe3AcPAX8u/bCaXWS5wzACw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T10:17:34.071931Z","bundle_sha256":"8c929d9ca5b1dc9ab5591e220a246c5c52588099e8bfa0b4605de3ccad90271c"}}