{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:KDT6BQ4UNBNNBBSBZ76BQCEP43","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":"7730572ec07690f86c40d1b4577b49aa427f1727d3b453f351395223a1335dad","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1997-08-05T15:13:46Z","title_canon_sha256":"c2036151b050f8326b0ff9851016ac9619c1f359bba2892f8f848f8a8319324a"},"schema_version":"1.0","source":{"id":"hep-ex/9708007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/9708007","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/9708007v1","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/9708007","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"pith_short_12","alias_value":"KDT6BQ4UNBNN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"KDT6BQ4UNBNNBBSB","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"KDT6BQ4U","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:7e3e9dc4a04faa5b093066e1a9f33dcf0e5a396c7b208c9abaf0dae83e4e164f","target":"graph","created_at":"2026-05-18T03:47:21Z","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":"Using the ZEUS detector at HERA, we have searched for heavy excited states of electrons, neutrinos, and quarks in $e^+p$ collisions at a center-of-mass energy of 300~GeV. With an integrated luminosity of 9.4~pb$^{-1}$, no evidence was found for electroweak production and decay of such states. Limits on the production cross section times branching ratio and on the characteristic couplings, $f/\\Lambda$, are derived for masses up to 250~GeV. For the particular choice $f/\\Lambda = 1/M_{f^*}$, we exclude at the 95% confidence level excited electrons with mass between 30 and 200~GeV, excited electro","authors_text":"ZEUS Collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"1997-08-05T15:13:46Z","title":"A Search for Excited Fermions in e+ p Collisions at HERA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9708007","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:f80a1bd0a1f79f2309c003168802803c29c2e7c2a58ca7a0b00d1a7257013b64","target":"record","created_at":"2026-05-18T03:47:21Z","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":"7730572ec07690f86c40d1b4577b49aa427f1727d3b453f351395223a1335dad","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1997-08-05T15:13:46Z","title_canon_sha256":"c2036151b050f8326b0ff9851016ac9619c1f359bba2892f8f848f8a8319324a"},"schema_version":"1.0","source":{"id":"hep-ex/9708007","kind":"arxiv","version":1}},"canonical_sha256":"50e7e0c394685ad08641cffc18088fe6f4cf84a475d0d0d63f45e929ed47daad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50e7e0c394685ad08641cffc18088fe6f4cf84a475d0d0d63f45e929ed47daad","first_computed_at":"2026-05-18T03:47:21.633842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:21.633842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IONj1PPohjffWYSj8gSVwt0UmWKDceren12sp3PUqXetjg2EZ0NUPbAcpxDrQBUH19mQVSQ+yKHf5OB4naflAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:21.634280Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/9708007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f80a1bd0a1f79f2309c003168802803c29c2e7c2a58ca7a0b00d1a7257013b64","sha256:7e3e9dc4a04faa5b093066e1a9f33dcf0e5a396c7b208c9abaf0dae83e4e164f"],"state_sha256":"54064545032490611a04bff43de3b34c8b245bcf72c5f4d4c3863665d5042fa4"}