{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:GYLTVPXWJGP3NMJHPWUBCJ2L6Z","short_pith_number":"pith:GYLTVPXW","canonical_record":{"source":{"id":"hep-ph/9706304","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1997-06-09T19:42:45Z","cross_cats_sorted":[],"title_canon_sha256":"19c3ffedc369c9246325c4511cc13db0d9358ab56aa7e00dba547052a1fd9d85","abstract_canon_sha256":"9cb8cec008953838a81f87fe7437743426b5ea0f311c6da0e151d516c6a31ade"},"schema_version":"1.0"},"canonical_sha256":"36173abef6499fb6b1277da811274bf65b2fc86d25af01e88df31e7f4903ce78","source":{"kind":"arxiv","id":"hep-ph/9706304","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9706304","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9706304v1","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9706304","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"pith_short_12","alias_value":"GYLTVPXWJGP3","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"GYLTVPXWJGP3NMJH","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"GYLTVPXW","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:GYLTVPXWJGP3NMJHPWUBCJ2L6Z","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/9706304","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1997-06-09T19:42:45Z","cross_cats_sorted":[],"title_canon_sha256":"19c3ffedc369c9246325c4511cc13db0d9358ab56aa7e00dba547052a1fd9d85","abstract_canon_sha256":"9cb8cec008953838a81f87fe7437743426b5ea0f311c6da0e151d516c6a31ade"},"schema_version":"1.0"},"canonical_sha256":"36173abef6499fb6b1277da811274bf65b2fc86d25af01e88df31e7f4903ce78","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:06:08.779756Z","signature_b64":"lumvRE3MaXx0ndl1tADPlbNjAxXAwcbi1PXl5KBp6WQNoZZZxJbcWPYAMURyyHS26nqYaldBUUDN0MsVBcqpDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36173abef6499fb6b1277da811274bf65b2fc86d25af01e88df31e7f4903ce78","last_reissued_at":"2026-05-18T01:06:08.779059Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:06:08.779059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/9706304","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:06:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9QAnJLQCL9gQ096AmhWkgOOL08giLOcABtCL7tEaZTtOfuHbefzT1aiW+Tvxeaaz0iLKq5TVwAbx4IKWpEURCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:40:54.054306Z"},"content_sha256":"cdde026b9f89535aaecc5fbbc3853676301bef9f58420fd6542a8f4c58ad7457","schema_version":"1.0","event_id":"sha256:cdde026b9f89535aaecc5fbbc3853676301bef9f58420fd6542a8f4c58ad7457"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:GYLTVPXWJGP3NMJHPWUBCJ2L6Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Maximizing Spin Correlations in Top Quark Pair Production at the Tevatron","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Gregory Mahlon (U. Mich.), Stephen Parke (Fermilab)","submitted_at":"1997-06-09T19:42:45Z","abstract_excerpt":"A comparison is made between the off-diagonal and helicity spin bases for top quark pair production at the FNAL Tevatron. In the off-diagonal basis, 92% of the top quark pairs are in the spin configuration up-down plus down-up, whereas in the helicity basis only 70% are left-right plus right-left. The off-diagonal basis maximizes the spin asymmetry and hence the measured angular correlations between the decay products, which are more than twice as big in this basis as compared to the helicity basis. In addition, for the process q qbar --> t tbar, we give a very simple analytic expression for t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9706304","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:06:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hD4TjDaT9Oi0kA73csHHgMMby8tjtUAHuJcFsSY/fIrlK4OlHwxwEGKgBeUpxXnS2tEgWClDXFyRU6shFPIpDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T19:40:54.054655Z"},"content_sha256":"70fc03ce220d279ad0596493b2ce107b8a146e08ba424f690ac65c244767c006","schema_version":"1.0","event_id":"sha256:70fc03ce220d279ad0596493b2ce107b8a146e08ba424f690ac65c244767c006"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/bundle.json","state_url":"https://pith.science/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T19:40:54Z","links":{"resolver":"https://pith.science/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z","bundle":"https://pith.science/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/bundle.json","state":"https://pith.science/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GYLTVPXWJGP3NMJHPWUBCJ2L6Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:GYLTVPXWJGP3NMJHPWUBCJ2L6Z","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":"9cb8cec008953838a81f87fe7437743426b5ea0f311c6da0e151d516c6a31ade","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1997-06-09T19:42:45Z","title_canon_sha256":"19c3ffedc369c9246325c4511cc13db0d9358ab56aa7e00dba547052a1fd9d85"},"schema_version":"1.0","source":{"id":"hep-ph/9706304","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9706304","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9706304v1","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9706304","created_at":"2026-05-18T01:06:08Z"},{"alias_kind":"pith_short_12","alias_value":"GYLTVPXWJGP3","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"GYLTVPXWJGP3NMJH","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"GYLTVPXW","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:70fc03ce220d279ad0596493b2ce107b8a146e08ba424f690ac65c244767c006","target":"graph","created_at":"2026-05-18T01:06:08Z","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":"A comparison is made between the off-diagonal and helicity spin bases for top quark pair production at the FNAL Tevatron. In the off-diagonal basis, 92% of the top quark pairs are in the spin configuration up-down plus down-up, whereas in the helicity basis only 70% are left-right plus right-left. The off-diagonal basis maximizes the spin asymmetry and hence the measured angular correlations between the decay products, which are more than twice as big in this basis as compared to the helicity basis. In addition, for the process q qbar --> t tbar, we give a very simple analytic expression for t","authors_text":"Gregory Mahlon (U. Mich.), Stephen Parke (Fermilab)","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1997-06-09T19:42:45Z","title":"Maximizing Spin Correlations in Top Quark Pair Production at the Tevatron"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9706304","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:cdde026b9f89535aaecc5fbbc3853676301bef9f58420fd6542a8f4c58ad7457","target":"record","created_at":"2026-05-18T01:06:08Z","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":"9cb8cec008953838a81f87fe7437743426b5ea0f311c6da0e151d516c6a31ade","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1997-06-09T19:42:45Z","title_canon_sha256":"19c3ffedc369c9246325c4511cc13db0d9358ab56aa7e00dba547052a1fd9d85"},"schema_version":"1.0","source":{"id":"hep-ph/9706304","kind":"arxiv","version":1}},"canonical_sha256":"36173abef6499fb6b1277da811274bf65b2fc86d25af01e88df31e7f4903ce78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36173abef6499fb6b1277da811274bf65b2fc86d25af01e88df31e7f4903ce78","first_computed_at":"2026-05-18T01:06:08.779059Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:06:08.779059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lumvRE3MaXx0ndl1tADPlbNjAxXAwcbi1PXl5KBp6WQNoZZZxJbcWPYAMURyyHS26nqYaldBUUDN0MsVBcqpDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:06:08.779756Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9706304","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cdde026b9f89535aaecc5fbbc3853676301bef9f58420fd6542a8f4c58ad7457","sha256:70fc03ce220d279ad0596493b2ce107b8a146e08ba424f690ac65c244767c006"],"state_sha256":"dbccd0e417a932e01f8684ce5516d9eda6427305da954c1a23769e568436fd84"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FBn2IaDpVz2KCWZzlYMQKcCI5A8u4ZrlmfWNqcjnMG+GmidEC4pMd4F5FojePoRRcV/H7zNWJEAbrb09SMCRDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T19:40:54.056710Z","bundle_sha256":"d3e42ff66fe4551a8ce41c2b1f1e85461499a25058949fa3c5a02ef15771fbe1"}}