{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UC245RMBE77QSDXDCOGVUU6GF6","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":"78252edb95a9d7a243e2367365b9ef369bd949a63007fb423f82bac4b5cb34e3","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2018-02-11T19:19:00Z","title_canon_sha256":"981807d1d985e7965e6657ae4ba9f69d1fa86ff638a8bb4b95534456e3037c8b"},"schema_version":"1.0","source":{"id":"1802.03794","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03794","created_at":"2026-05-18T00:09:16Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03794v2","created_at":"2026-05-18T00:09:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03794","created_at":"2026-05-18T00:09:16Z"},{"alias_kind":"pith_short_12","alias_value":"UC245RMBE77Q","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UC245RMBE77QSDXD","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UC245RMB","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:af4ae4deeae58835c7eb79b97b67da4b90d53599d787f590c123cc6ef8c5f099","target":"graph","created_at":"2026-05-18T00:09:16Z","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":"High energy positron annihilation is a viable mechanism to produce dark photons ($A^\\prime$). This reaction plays a significant role in beam-dump experiments using experiments using multi-GeV electron-beams on thick targets by enhancing the sensitivity to $A^\\prime$ production. The positrons produced by the electromagnetic shower can produce an $A^\\prime$ via non-resonant ($e^+ + e^- \\to \\gamma + A^\\prime$) and resonant ($e^+ + e^- \\to A^\\prime$) annihilation on atomic electrons. For visible decays, the contribution of resonant annihilation results in a larger sensitivity with respect to limit","authors_text":"A. Celentano, C. D. R. Carvajal, E. Nardi, L. Marsicano, M. Battaglieri, M. Bondi', M. De Napoli, M. Raggi, P. Valente, R. De Vita","cross_cats":["hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2018-02-11T19:19:00Z","title":"Dark photon production through positron annihilation in beam-dump experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03794","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":"sha256:620cf8df88499dbf8761508cfd1129c72bbcd02808a48d1dfc7472692893d270","target":"record","created_at":"2026-05-18T00:09:16Z","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":"78252edb95a9d7a243e2367365b9ef369bd949a63007fb423f82bac4b5cb34e3","cross_cats_sorted":["hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2018-02-11T19:19:00Z","title_canon_sha256":"981807d1d985e7965e6657ae4ba9f69d1fa86ff638a8bb4b95534456e3037c8b"},"schema_version":"1.0","source":{"id":"1802.03794","kind":"arxiv","version":2}},"canonical_sha256":"a0b5cec58127ff090ee3138d5a53c62f89820beb19c70e9c96987a9b56d16ace","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0b5cec58127ff090ee3138d5a53c62f89820beb19c70e9c96987a9b56d16ace","first_computed_at":"2026-05-18T00:09:16.243760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:16.243760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GULSlqSlxE5RIV0lZcUJPk0BouJSu9ptjmp9yzoTe1kyYeTqV42A2l3gAFjN8YqOUqDKZz2sMMK3PZNNComCDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:16.244401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.03794","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:620cf8df88499dbf8761508cfd1129c72bbcd02808a48d1dfc7472692893d270","sha256:af4ae4deeae58835c7eb79b97b67da4b90d53599d787f590c123cc6ef8c5f099"],"state_sha256":"14ea0e14755185d1a75d69b5b7b0f785305a1b36ac6949d961adfdaaa02ec8c9"}