{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:VZ2JVDFXRHRTMXDJHSOUNWTLAM","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":"187aea59592bc9466ef455c024720890aa068bd889b747ad13a5f82639b3d662","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1999-05-29T16:56:15Z","title_canon_sha256":"daff6315fbc8741aa86aa233cd03f6bc3933285aac3945aab6b7dedb8d2912dc"},"schema_version":"1.0","source":{"id":"hep-ex/9905060","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/9905060","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/9905060v2","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/9905060","created_at":"2026-05-18T03:47:21Z"},{"alias_kind":"pith_short_12","alias_value":"VZ2JVDFXRHRT","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"VZ2JVDFXRHRTMXDJ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"VZ2JVDFX","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:ad4bd8800364c99deaa8aa1309df8c79af37cdd7ff33a2175cd5f10c817e69dc","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":"We have compared the decay rates of K_L and K_S to \\pi^+ \\pi^- and \\pi^0 \\pi^0 final states using a subset of the data from the KTeV experiment (E832) at Fermilab. We find that the direct-CP-violation parameter Re(\\epsilon'/\\epsilon) is equal to (28.0 \\pm 3.0 (stat) \\pm 2.8 (syst)) \\times 10^{-4}. This result definitively establishes the existence of CP violation in a decay process.","authors_text":"KTeV Collaboration","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"1999-05-29T16:56:15Z","title":"Observation of Direct CP Violation in K_{S,L} to \\pi \\pi Decays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9905060","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":"sha256:5eab66153a5f20dc52381fb21bed38b1a35fefd91039194982072b076086eb7f","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":"187aea59592bc9466ef455c024720890aa068bd889b747ad13a5f82639b3d662","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"1999-05-29T16:56:15Z","title_canon_sha256":"daff6315fbc8741aa86aa233cd03f6bc3933285aac3945aab6b7dedb8d2912dc"},"schema_version":"1.0","source":{"id":"hep-ex/9905060","kind":"arxiv","version":2}},"canonical_sha256":"ae749a8cb789e3365c693c9d46da6b030c1169bd675b0c3d7c2c1f5897ed5692","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae749a8cb789e3365c693c9d46da6b030c1169bd675b0c3d7c2c1f5897ed5692","first_computed_at":"2026-05-18T03:47:21.018591Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:21.018591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aWa4KA0vU0dz1OfmZMv0DmdvS8qQztDuBH/Kps7G2W0YJwqzevBHsMAGiN+Y6ljFpc1IauPJ/F7j5XXB5VHaDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:21.018960Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/9905060","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5eab66153a5f20dc52381fb21bed38b1a35fefd91039194982072b076086eb7f","sha256:ad4bd8800364c99deaa8aa1309df8c79af37cdd7ff33a2175cd5f10c817e69dc"],"state_sha256":"dd26bec58c447ea047c03ec633557e8de2f3516c9192dc3455cda4fa03365e0d"}