{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:AXNQY3LJQPRASFPOCNSWEWNZ26","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":"72532822789c68b9c4fdbd6cbdfef628d93b939f5529d89cd0bf8bdab5b86853","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1998-05-28T21:39:54Z","title_canon_sha256":"74322c96e260bee6c2cdf2a2abff988074a8af4b33467461b2ebb227d014e196"},"schema_version":"1.0","source":{"id":"hep-ex/9805034","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/9805034","created_at":"2026-07-04T17:28:41Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/9805034v1","created_at":"2026-07-04T17:28:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/9805034","created_at":"2026-07-04T17:28:41Z"},{"alias_kind":"pith_short_12","alias_value":"AXNQY3LJQPRA","created_at":"2026-07-04T17:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"AXNQY3LJQPRASFPO","created_at":"2026-07-04T17:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"AXNQY3LJ","created_at":"2026-07-04T17:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:c65c79f0a8d0d2b77bd2df3e7c314846550616d5dee58fff4c7dc2e25567a095","target":"graph","created_at":"2026-07-04T17:28:41Z","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-ex/9805034/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have observed bottom-charm mesons B_c via the decay mode Bc -> J/psi lepton neutrino in 1.8 TeV p-bar p collisions using the CDF detector at the Fermilab Tevatron. A fit of background and signal contributions to the J/psi + lepton mass distribution yielded 20.4 +6.2 -5.5 events from B_c mesons. A fit to the same distribution with background alone was rejected at the level of 4.8 standard deviations. We measured the B_c mass to be 6.40 +- 0.39 +- 0.13 GeVc^2 and the B_c lifetime to be tau(B_c) = 0.46 +0.18 -0.16 +- 0.03 ps. We measured the production cross section times branching ratio for B","authors_text":"CDF Collaboration: F. Abe et. al","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"1998-05-28T21:39:54Z","title":"Observation of the B_c Meson in p-bar p Collisions at sqrt{s} = 1.8 TeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9805034","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":"sha256:85df4bb5bceb52b16621824ec35cb30d0059919e57d6d0644a9ee1ea4d3e9271","target":"record","created_at":"2026-07-04T17:28:41Z","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":"72532822789c68b9c4fdbd6cbdfef628d93b939f5529d89cd0bf8bdab5b86853","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1998-05-28T21:39:54Z","title_canon_sha256":"74322c96e260bee6c2cdf2a2abff988074a8af4b33467461b2ebb227d014e196"},"schema_version":"1.0","source":{"id":"hep-ex/9805034","kind":"arxiv","version":1}},"canonical_sha256":"05db0c6d6983e20915ee13656259b9d79c6a72cdc64ba07a1c117288848fa690","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05db0c6d6983e20915ee13656259b9d79c6a72cdc64ba07a1c117288848fa690","first_computed_at":"2026-07-04T17:28:41.673509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:28:41.673509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nwyrV4/kiobqGDSElRgwfz3amMv8mLVw98enDxOkVV9HY+71H473S3fUyW5sXiRJw0sfzQ1Qzo7nDspxfB+ZDA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:28:41.673944Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/9805034","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:85df4bb5bceb52b16621824ec35cb30d0059919e57d6d0644a9ee1ea4d3e9271","sha256:c65c79f0a8d0d2b77bd2df3e7c314846550616d5dee58fff4c7dc2e25567a095"],"state_sha256":"365fa4c00f99fd571f4d1de392fa4d8ceba929ff9250fc68e7caa23f6a752f0d"}