{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:P4VJYKAZVCHZNEVQHMY2KSYIFF","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":"bbb862a82ddc5d9f7754539f26cb918d7d1293bfca7cded6293fa5dde341da2a","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1997-04-28T15:58:57Z","title_canon_sha256":"3bbb38da26b7475009af2a2a82467da83f85a0aa9468639dfb96901213e1d9b2"},"schema_version":"1.0","source":{"id":"hep-ph/9704420","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9704420","created_at":"2026-05-18T04:13:25Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9704420v1","created_at":"2026-05-18T04:13:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9704420","created_at":"2026-05-18T04:13:25Z"},{"alias_kind":"pith_short_12","alias_value":"P4VJYKAZVCHZ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"P4VJYKAZVCHZNEVQ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"P4VJYKAZ","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:1bed608454adecc92b21d74cf4bba9d8eab98d7a9243cbaba052fda57a0b0920","target":"graph","created_at":"2026-05-18T04:13:25Z","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":"Final state quark-antiquark interactions may give origin to non zero values of the off-diagonal element rho_{1,-1} of the helicity density matrix of vector mesons produced in e+e- annihilations, as confirmed by recent OPAL data on phi and D^*'s. Predictions are given for rho_{1,-1} of several mesons produced at large z and small p_T, i.e. collinear with the parent jet; the values obtained for phi and D^* are in agreement with data.","authors_text":"2), (2) IPN, (3) INFN, 4) ((1) University, (4) CBPF, Brazil), Cagliari, France, Francesco Murgia (3), INFN, Italy, Lyon, Marc Bertini (1, Mauro Anselmino (1), Paulo Quintairos (1, Rio de Janeiro, Torino","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1997-04-28T15:58:57Z","title":"Off-diagonal Helicity Density Matrix Elements for Vector Mesons Produced at LEP"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9704420","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":"sha256:3e1129aa4bf0d6be6bb276e42f6576c6ff86a8ed0e8f9cbf23499e227cc1c1f3","target":"record","created_at":"2026-05-18T04:13:25Z","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":"bbb862a82ddc5d9f7754539f26cb918d7d1293bfca7cded6293fa5dde341da2a","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1997-04-28T15:58:57Z","title_canon_sha256":"3bbb38da26b7475009af2a2a82467da83f85a0aa9468639dfb96901213e1d9b2"},"schema_version":"1.0","source":{"id":"hep-ph/9704420","kind":"arxiv","version":1}},"canonical_sha256":"7f2a9c2819a88f9692b03b31a54b0829797560d1760fba4da612356e22a42b32","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7f2a9c2819a88f9692b03b31a54b0829797560d1760fba4da612356e22a42b32","first_computed_at":"2026-05-18T04:13:25.371812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:25.371812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VW4VKHhDplDMv/YLmgiPm2hx6n76oMr447jhdtuws9ppAFUamfLYRk/81Fj9oEIZeisx9xr8uk9MEJLElLEBCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:25.372210Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9704420","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e1129aa4bf0d6be6bb276e42f6576c6ff86a8ed0e8f9cbf23499e227cc1c1f3","sha256:1bed608454adecc92b21d74cf4bba9d8eab98d7a9243cbaba052fda57a0b0920"],"state_sha256":"45ae133758e1f1b0d7dfd1aa1d8efd6dd6a0869f0cf3e34c37f48ef33678228a"}