{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:EWZ2JOQRTUGTPBTBOPQBGX462Q","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":"3e53381008f60d9a3104551942a43ef19b3f70394d6352d132cc51abd2cca5eb","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1996-11-26T21:51:18Z","title_canon_sha256":"41d279a74c620109bbdf7082c53453db0bfa655054453938511ac70102522b90"},"schema_version":"1.0","source":{"id":"nucl-th/9611053","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9611053","created_at":"2026-07-04T15:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9611053v2","created_at":"2026-07-04T15:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9611053","created_at":"2026-07-04T15:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"EWZ2JOQRTUGT","created_at":"2026-07-04T15:23:22Z"},{"alias_kind":"pith_short_16","alias_value":"EWZ2JOQRTUGTPBTB","created_at":"2026-07-04T15:23:22Z"},{"alias_kind":"pith_short_8","alias_value":"EWZ2JOQR","created_at":"2026-07-04T15:23:22Z"}],"graph_snapshots":[{"event_id":"sha256:1351703e7ff5acf64719ae95ac684550b2d7442c541affcf71199b9305d41423","target":"graph","created_at":"2026-07-04T15:23:22Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/nucl-th/9611053/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The number and type of measurements needed to ascertain the amplitudes for pseudoscalar meson photoproduction are analyzed in this paper. It is found that 8 carefully selected measurements can determine the four transversity amplitudes without discrete ambiguities. That number of measurements is one less than previously believed. We approach this problem in two distinct ways: (1) solving for the amplitude magnitudes and phases directly; and (2) using a bilinear helicity product formulation to map an algebra of measurements over to the well-known algebra of the $4\\times 4$ Gamma matrices. It is","authors_text":"Frank Tabakin (University of Pittsburgh), Wen-Tai Chiang","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1996-11-26T21:51:18Z","title":"Completeness Rules for Spin Observables in Pseudoscalar Meson Photoproduction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9611053","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":"sha256:5c9be0294511403db344c39947debdf7fc2036d2a2087d4c216ad23944001fc8","target":"record","created_at":"2026-07-04T15:23:22Z","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":"3e53381008f60d9a3104551942a43ef19b3f70394d6352d132cc51abd2cca5eb","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1996-11-26T21:51:18Z","title_canon_sha256":"41d279a74c620109bbdf7082c53453db0bfa655054453938511ac70102522b90"},"schema_version":"1.0","source":{"id":"nucl-th/9611053","kind":"arxiv","version":2}},"canonical_sha256":"25b3a4ba119d0d37866173e0135f9ed4202d131cf4c6e885d3f055602083e300","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25b3a4ba119d0d37866173e0135f9ed4202d131cf4c6e885d3f055602083e300","first_computed_at":"2026-07-04T15:23:22.343442Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:23:22.343442Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E4noNeA5k6yub/xnNsiBD6Yz/IdnHvDR4/Ppq7kLhxg6VSY6dGZDQ1/Bzeep5alOBng6tS7NMRjhREzn92QQCA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:23:22.343868Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9611053","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c9be0294511403db344c39947debdf7fc2036d2a2087d4c216ad23944001fc8","sha256:1351703e7ff5acf64719ae95ac684550b2d7442c541affcf71199b9305d41423"],"state_sha256":"7aa529f7313af720af1798dda1c9eb400976fbd7279cd8a8f0f5ad62ed14f70d"}