{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XRSLCMEFFYACVLGYGMNU55Q4BC","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":"5528aeaf3a946586dd46a75a2a0e2f2f7be9eba3dd77d463a2c072b7d09b81e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-22T14:24:40Z","title_canon_sha256":"6f44a89cc80494e46b928d68955611f5c04c6c9aba5c00662b3d011843a3524e"},"schema_version":"1.0","source":{"id":"1507.06204","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.06204","created_at":"2026-05-18T01:25:46Z"},{"alias_kind":"arxiv_version","alias_value":"1507.06204v2","created_at":"2026-05-18T01:25:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06204","created_at":"2026-05-18T01:25:46Z"},{"alias_kind":"pith_short_12","alias_value":"XRSLCMEFFYAC","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XRSLCMEFFYACVLGY","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XRSLCMEF","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:a1b1b58f28d9f4c77cb2ea672f1167c74349e9983774bc6bbbacf062d4aa6bee","target":"graph","created_at":"2026-05-18T01:25:46Z","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":"Verifying $V_{tb} \\simeq 1$ is critical to test the three generation assumption of the Standard Model. So far our best knowledge of $V_{tb}$ is inferred either from the $3\\times 3$ unitarity of CKM matrix or from single top-quark productions upon the assumption of universal weak couplings. The unitarity could be relaxed in new physics models with extra heavy quarks and the universality of weak couplings could also be broken if the $Wtb$ coupling is modified in new physics models. In this work we propose to measure $V_{tb}$ in the process of $e^+ e^- \\to t\\bar{t}$ without prior knowledge of the","authors_text":"Bin Yan, Qing-Hong Cao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-22T14:24:40Z","title":"Determining $V_{tb}$ at Electron-Positron Colliders"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06204","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":"sha256:5ec86e9ea4236cebc2352c3328da1850b98f92d0224453a107cafaea16b5d5e1","target":"record","created_at":"2026-05-18T01:25:46Z","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":"5528aeaf3a946586dd46a75a2a0e2f2f7be9eba3dd77d463a2c072b7d09b81e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-07-22T14:24:40Z","title_canon_sha256":"6f44a89cc80494e46b928d68955611f5c04c6c9aba5c00662b3d011843a3524e"},"schema_version":"1.0","source":{"id":"1507.06204","kind":"arxiv","version":2}},"canonical_sha256":"bc64b130852e002aacd8331b4ef61c088f3539f36d75c639a6187a2810cc468e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc64b130852e002aacd8331b4ef61c088f3539f36d75c639a6187a2810cc468e","first_computed_at":"2026-05-18T01:25:46.844461Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:46.844461Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eTX7NihxxsIXfuJDsM6IOD9mg6LGRmHX2Fd/sj2uGIdNzhx5xgjetJmrCXSxVQYiFWKr4w0yDt8OS92ns7rrBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:46.844871Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.06204","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ec86e9ea4236cebc2352c3328da1850b98f92d0224453a107cafaea16b5d5e1","sha256:a1b1b58f28d9f4c77cb2ea672f1167c74349e9983774bc6bbbacf062d4aa6bee"],"state_sha256":"38182155524ff66eb39a1dfb6de6d31aab44b5cb81b6ee9a379a492bfe2dc730"}