{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:UTBJ6ENNTHC2DXBLV643UQKVNO","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":"719dab16f6183c78369fdbb050fe4e9e4e5dff24e6e7546527abcfe1b6ee4e87","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-20T10:40:56Z","title_canon_sha256":"c87cc425d160b1a8a6e2b0fb870449819f2d1f56b150800f6388806dc3269e98"},"schema_version":"1.0","source":{"id":"hep-ph/0407224","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0407224","created_at":"2026-05-18T04:13:36Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0407224v2","created_at":"2026-05-18T04:13:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0407224","created_at":"2026-05-18T04:13:36Z"},{"alias_kind":"pith_short_12","alias_value":"UTBJ6ENNTHC2","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"UTBJ6ENNTHC2DXBL","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"UTBJ6ENN","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:578b1438d7fa85cce8ad5075489d7c969dc910fe75d3ee51321a414384ac34b2","target":"graph","created_at":"2026-05-18T04:13:36Z","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":"Optimal observables are known to lead to minimal statistical errors on parameters for a given normalised event distribution of a physics reaction. Thereby all statistical correlations are taken into account. Therefore, on the one hand they are a useful tool to extract values on a set of parameters from measured data. On the other hand one can calculate the minimal constraints on these parameters achievable by any data-analysis method for the specific reaction. In case the final states can be reconstructed without ambiguities optimal observables have a particularly simple form. We give explicit","authors_text":"Felix Nagel, Otto Nachtmann","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2004-07-20T10:40:56Z","title":"Optimal observables and phase-space ambiguities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0407224","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":"sha256:38c8c61d301dc7c67bb64beba8a42d7e2ba23ae84ec4ad98e95558a169df7cef","target":"record","created_at":"2026-05-18T04:13:36Z","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":"719dab16f6183c78369fdbb050fe4e9e4e5dff24e6e7546527abcfe1b6ee4e87","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2004-07-20T10:40:56Z","title_canon_sha256":"c87cc425d160b1a8a6e2b0fb870449819f2d1f56b150800f6388806dc3269e98"},"schema_version":"1.0","source":{"id":"hep-ph/0407224","kind":"arxiv","version":2}},"canonical_sha256":"a4c29f11ad99c5a1dc2bafb9ba41556ba7ea0e757c322e4d74d3f55bcf5a07a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4c29f11ad99c5a1dc2bafb9ba41556ba7ea0e757c322e4d74d3f55bcf5a07a1","first_computed_at":"2026-05-18T04:13:36.167191Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:36.167191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"59FnGgbhtOuLUIrTaJHzsDd9bIhgnE5Fh6+HmD6bXWaIJPL1oqHe1KytxQ6w8v9jqG+np4iXzPPKx/43ljsLCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:36.168381Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0407224","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38c8c61d301dc7c67bb64beba8a42d7e2ba23ae84ec4ad98e95558a169df7cef","sha256:578b1438d7fa85cce8ad5075489d7c969dc910fe75d3ee51321a414384ac34b2"],"state_sha256":"2f00b5d984e0a98b6879b309b3c5b4a1ad774fa27b2bb644e0794b108ab0649d"}