{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1998:AXNQY3LJQPRASFPOCNSWEWNZ26","short_pith_number":"pith:AXNQY3LJ","schema_version":"1.0","canonical_sha256":"05db0c6d6983e20915ee13656259b9d79c6a72cdc64ba07a1c117288848fa690","source":{"kind":"arxiv","id":"hep-ex/9805034","version":1},"attestation_state":"computed","paper":{"title":"Observation of the B_c Meson in p-bar p Collisions at sqrt{s} = 1.8 TeV","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CDF Collaboration: F. Abe et. al","submitted_at":"1998-05-28T21:39:54Z","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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"hep-ex/9805034","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"1998-05-28T21:39:54Z","cross_cats_sorted":[],"title_canon_sha256":"74322c96e260bee6c2cdf2a2abff988074a8af4b33467461b2ebb227d014e196","abstract_canon_sha256":"72532822789c68b9c4fdbd6cbdfef628d93b939f5529d89cd0bf8bdab5b86853"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:28:41.673944Z","signature_b64":"nwyrV4/kiobqGDSElRgwfz3amMv8mLVw98enDxOkVV9HY+71H473S3fUyW5sXiRJw0sfzQ1Qzo7nDspxfB+ZDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05db0c6d6983e20915ee13656259b9d79c6a72cdc64ba07a1c117288848fa690","last_reissued_at":"2026-07-04T17:28:41.673509Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:28:41.673509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of the B_c Meson in p-bar p Collisions at sqrt{s} = 1.8 TeV","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CDF Collaboration: F. Abe et. al","submitted_at":"1998-05-28T21:39:54Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9805034","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ex/9805034/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/9805034","created_at":"2026-07-04T17:28:41.673568+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/9805034v1","created_at":"2026-07-04T17:28:41.673568+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/9805034","created_at":"2026-07-04T17:28:41.673568+00:00"},{"alias_kind":"pith_short_12","alias_value":"AXNQY3LJQPRA","created_at":"2026-07-04T17:28:41.673568+00:00"},{"alias_kind":"pith_short_16","alias_value":"AXNQY3LJQPRASFPO","created_at":"2026-07-04T17:28:41.673568+00:00"},{"alias_kind":"pith_short_8","alias_value":"AXNQY3LJ","created_at":"2026-07-04T17:28:41.673568+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":3,"sample":[{"citing_arxiv_id":"2411.18639","citing_title":"Averages of $b$-hadron, $c$-hadron, and $\\tau$-lepton properties as of 2023","ref_index":139,"is_internal_anchor":true},{"citing_arxiv_id":"2601.01305","citing_title":"$B_c$ meson decays into $S$-wave charmonium plus light meson pairs in the perturbative QCD approach","ref_index":3,"is_internal_anchor":true},{"citing_arxiv_id":"2602.05348","citing_title":"Resolved photoproduction of the $B_c$ meson in electron-proton collisions","ref_index":4,"is_internal_anchor":true},{"citing_arxiv_id":"2604.04846","citing_title":"$\\boldsymbol{B_c}$ Meson Spectroscopy from Bayesian MCMC: Probing Confinement and State Mixing","ref_index":16,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26","json":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26.json","graph_json":"https://pith.science/api/pith-number/AXNQY3LJQPRASFPOCNSWEWNZ26/graph.json","events_json":"https://pith.science/api/pith-number/AXNQY3LJQPRASFPOCNSWEWNZ26/events.json","paper":"https://pith.science/paper/AXNQY3LJ"},"agent_actions":{"view_html":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26","download_json":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26.json","view_paper":"https://pith.science/paper/AXNQY3LJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-ex/9805034&json=true","fetch_graph":"https://pith.science/api/pith-number/AXNQY3LJQPRASFPOCNSWEWNZ26/graph.json","fetch_events":"https://pith.science/api/pith-number/AXNQY3LJQPRASFPOCNSWEWNZ26/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26/action/storage_attestation","attest_author":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26/action/author_attestation","sign_citation":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26/action/citation_signature","submit_replication":"https://pith.science/pith/AXNQY3LJQPRASFPOCNSWEWNZ26/action/replication_record"}},"created_at":"2026-07-04T17:28:41.673568+00:00","updated_at":"2026-07-04T17:28:41.673568+00:00"}