{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:ADQB4DYBZCCBVV3I5J2LZPB5Y5","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":"1e96d3330134ca3aab6311649ca5c8ac09cf6d03add89bf53f466f2cf85fed91","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1994-09-29T10:10:15Z","title_canon_sha256":"7471c01ceb5a51b0d949e3463b1d7309abeab981f9e2f2b81a520adad8af39f1"},"schema_version":"1.0","source":{"id":"hep-ph/9409437","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9409437","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9409437v1","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9409437","created_at":"2026-05-18T04:37:44Z"},{"alias_kind":"pith_short_12","alias_value":"ADQB4DYBZCCB","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_16","alias_value":"ADQB4DYBZCCBVV3I","created_at":"2026-05-18T12:25:47Z"},{"alias_kind":"pith_short_8","alias_value":"ADQB4DYB","created_at":"2026-05-18T12:25:47Z"}],"graph_snapshots":[{"event_id":"sha256:139f078b7cd31bd163eccda1a98cba3424026e7e593edd93ccdfbe294f97e743","target":"graph","created_at":"2026-05-18T04:37:44Z","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 study the $CP$-violating, $|\\Delta S| =1$ parameter $\\varepsilon '/\\varepsilon$ by computing the hadronic matrix elements in the chiral quark model. We estimate the coefficients of the next-to-leading order terms in the chiral expansion that correspond to the operators $Q_6$ and $Q_{11}$. We consider the impact of these corrections on the value of $\\varepsilon '/\\varepsilon$. We also investigate the possibility that the chiral quark model might drastically reduce the dimensional regularization $\\gamma_5$-scheme dependence of current evaluations of $\\varepsilon '/\\varepsilon$.","authors_text":"J.O. Eeg, M. Fabbrichesi, S. Bertolini","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1994-09-29T10:10:15Z","title":"Studying $\\varepsilon '/\\varepsilon$ in the Chiral Quark Model: $\\gamma_5$-Scheme Independence and NLO Hadronic Matrix Elements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9409437","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":"sha256:66fef715655f2f21ff53013a942608b3c8d58bdbd997f4364fed004d710a80d6","target":"record","created_at":"2026-05-18T04:37:44Z","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":"1e96d3330134ca3aab6311649ca5c8ac09cf6d03add89bf53f466f2cf85fed91","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1994-09-29T10:10:15Z","title_canon_sha256":"7471c01ceb5a51b0d949e3463b1d7309abeab981f9e2f2b81a520adad8af39f1"},"schema_version":"1.0","source":{"id":"hep-ph/9409437","kind":"arxiv","version":1}},"canonical_sha256":"00e01e0f01c8841ad768ea74bcbc3dc7457ab6cab0fda21e3fb6852cec92e407","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00e01e0f01c8841ad768ea74bcbc3dc7457ab6cab0fda21e3fb6852cec92e407","first_computed_at":"2026-05-18T04:37:44.720517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:37:44.720517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uM8n/uIiAuBOhiykFmnciBslz8Te2u3zW7oFT1lMv7/i6TJVBMGEZhPLq2Y4w99bPJWTDseRwth7Z4klXN76CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:37:44.721085Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9409437","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:66fef715655f2f21ff53013a942608b3c8d58bdbd997f4364fed004d710a80d6","sha256:139f078b7cd31bd163eccda1a98cba3424026e7e593edd93ccdfbe294f97e743"],"state_sha256":"a547c4e82cb06d7f2200fb5c6eac1d9d3ddff741fabee89a097f6e290dce29a2"}