{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YBA6BYZCAZR2A5KOGZTED5DENT","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":"907d7fee1e77d4beeac3c3ed79b049c2597d98d95eda1c1a0c916e6ff6c4fed6","cross_cats_sorted":["hep-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-20T10:07:44Z","title_canon_sha256":"6a54fa6c6191195901675ce738e1dda4e83aa5742752803da5815b1dcbc125e8"},"schema_version":"1.0","source":{"id":"1812.08454","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08454","created_at":"2026-07-05T01:31:47Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08454v2","created_at":"2026-07-05T01:31:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08454","created_at":"2026-07-05T01:31:47Z"},{"alias_kind":"pith_short_12","alias_value":"YBA6BYZCAZR2","created_at":"2026-07-05T01:31:47Z"},{"alias_kind":"pith_short_16","alias_value":"YBA6BYZCAZR2A5KO","created_at":"2026-07-05T01:31:47Z"},{"alias_kind":"pith_short_8","alias_value":"YBA6BYZC","created_at":"2026-07-05T01:31:47Z"}],"graph_snapshots":[{"event_id":"sha256:ed7dfaf653650d20f4bad1618d69e2746b162ac9621d75fc237245c52e335fa4","target":"graph","created_at":"2026-07-05T01:31:47Z","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/1812.08454/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The scalar and vector meson exchange contributions to the doubly radiative decays $\\eta^{(\\prime)}\\to\\pi^0\\gamma\\gamma$ and $\\eta^\\prime\\to\\eta\\gamma\\gamma$ are analysed within the Linear Sigma Model and Vector Meson Dominance frameworks, respectively. Predictions for the diphoton invariant mass spectra and the associated integrated branching ratios are given and compared with current available experimental data. Whilst a satisfactory description of the shape of the $\\eta\\to\\pi^{0}\\gamma\\gamma$ and $\\eta^\\prime\\to\\pi^{0}\\gamma\\gamma$ decay spectra is obtained, thus supporting the validity of t","authors_text":"Emilio Royo, Rafel Escribano, Renata Jora, Sergi Gonz\\`alez-Sol\\'is","cross_cats":["hep-ex","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-20T10:07:44Z","title":"A theoretical analysis of the doubly radiative decays $\\eta^{(\\prime)}\\to\\pi^0\\gamma\\gamma$ and $\\eta^\\prime\\to\\eta\\gamma\\gamma$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08454","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:d2c0af2f74103849963d1eddbf8393209a1b0b21e0324edc066f436e81172c6e","target":"record","created_at":"2026-07-05T01:31:47Z","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":"907d7fee1e77d4beeac3c3ed79b049c2597d98d95eda1c1a0c916e6ff6c4fed6","cross_cats_sorted":["hep-ex","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2018-12-20T10:07:44Z","title_canon_sha256":"6a54fa6c6191195901675ce738e1dda4e83aa5742752803da5815b1dcbc125e8"},"schema_version":"1.0","source":{"id":"1812.08454","kind":"arxiv","version":2}},"canonical_sha256":"c041e0e3220663a0754e366641f4646ce3e0d08d5ced5f594109d331bfe3d388","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c041e0e3220663a0754e366641f4646ce3e0d08d5ced5f594109d331bfe3d388","first_computed_at":"2026-07-05T01:31:47.600697Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:31:47.600697Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Canp/4ElnvIxgtYJNf/CC0BLH04b100wxSj+uHEXsFdwb5G7OIOLy+snlWLnPMULayE5QWYptjGTMqFJR4bNDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:31:47.601180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.08454","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2c0af2f74103849963d1eddbf8393209a1b0b21e0324edc066f436e81172c6e","sha256:ed7dfaf653650d20f4bad1618d69e2746b162ac9621d75fc237245c52e335fa4"],"state_sha256":"7165940072f7faceb9ac48fdb7a28cdf769256282c93cd107e30d89fac76eae3"}