{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:NFTPBDART6QS5QAMYPCKEH2TV6","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":"b283352441a269045b4869e20ae33939be1dbc2f81f6c7ef43e2a4072d7e9963","cross_cats_sorted":["hep-ex"],"license":"","primary_cat":"hep-ph","submitted_at":"1999-01-25T16:46:40Z","title_canon_sha256":"f07ad88e7ab77bda7f5ea87b21ae7b1d09f5aed2da36f9ca08f723d96faa2986"},"schema_version":"1.0","source":{"id":"hep-ph/9901405","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9901405","created_at":"2026-07-04T16:14:03Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9901405v2","created_at":"2026-07-04T16:14:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9901405","created_at":"2026-07-04T16:14:03Z"},{"alias_kind":"pith_short_12","alias_value":"NFTPBDART6QS","created_at":"2026-07-04T16:14:03Z"},{"alias_kind":"pith_short_16","alias_value":"NFTPBDART6QS5QAM","created_at":"2026-07-04T16:14:03Z"},{"alias_kind":"pith_short_8","alias_value":"NFTPBDAR","created_at":"2026-07-04T16:14:03Z"}],"graph_snapshots":[{"event_id":"sha256:c4caccaf54fbc2a4e3df8dbb95ed1fad64316a70358d9e9b6d5e89736d4cb8d3","target":"graph","created_at":"2026-07-04T16:14:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/hep-ph/9901405/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A phenomenological analysis on various decay processes is performed using an energy-dependent $\\eta-\\eta'$ mixing angle scheme. Special attention is given to the radiative couplings between lowest-lying vector and pseudoscalar mesons. The agreement between our predictions and the experimental values is remarkable. This analysis opens a connection to two-angle fits in the $\\eta-\\eta'$ sector.","authors_text":"J. M. Frere (Universite Libre de Bruxelles), R. Escribano","cross_cats":["hep-ex"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1999-01-25T16:46:40Z","title":"Phenomenological evidence for the energy dependence of the $\\eta-\\eta'$ mixing angle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9901405","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":"sha256:1f19f9f263b1d3a408ed009963a7a3d5a786f03f3f03946f7d8fdc60148fdd65","target":"record","created_at":"2026-07-04T16:14:03Z","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":"b283352441a269045b4869e20ae33939be1dbc2f81f6c7ef43e2a4072d7e9963","cross_cats_sorted":["hep-ex"],"license":"","primary_cat":"hep-ph","submitted_at":"1999-01-25T16:46:40Z","title_canon_sha256":"f07ad88e7ab77bda7f5ea87b21ae7b1d09f5aed2da36f9ca08f723d96faa2986"},"schema_version":"1.0","source":{"id":"hep-ph/9901405","kind":"arxiv","version":2}},"canonical_sha256":"6966f08c119fa12ec00cc3c4a21f53afbaa81b9f641110d2fee076fbe9802dff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6966f08c119fa12ec00cc3c4a21f53afbaa81b9f641110d2fee076fbe9802dff","first_computed_at":"2026-07-04T16:14:03.817688Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:14:03.817688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WOmKbtTtYY5qjxPu+h8vU3tbcfn7F0wPO5cSxFvawehwC4HRIQBxlne7ZRt+0t7Jfb/bL5brB/UMx3GxhQ08Dw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:14:03.818088Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9901405","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f19f9f263b1d3a408ed009963a7a3d5a786f03f3f03946f7d8fdc60148fdd65","sha256:c4caccaf54fbc2a4e3df8dbb95ed1fad64316a70358d9e9b6d5e89736d4cb8d3"],"state_sha256":"ed2459bb6accb1cb2aa4dbf3da80e11293ac9749140adcb76aac58e4179b71b3"}