{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:2OAZ3HEATF35KW4HH5MH7W3K6O","short_pith_number":"pith:2OAZ3HEA","canonical_record":{"source":{"id":"1204.0013","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-03-30T20:15:26Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"baf4b5cfeb53592b316ecfa240c3e186daad6c1f77bca638cc6266b75c86bd0f","abstract_canon_sha256":"2fc4c96df37177b08b84e9a5cbd6d6e49ee53452cd6afad4c27372804177d6e9"},"schema_version":"1.0"},"canonical_sha256":"d3819d9c809977d55b873f587fdb6af38025d60c5e87d3fac1f85c1a32ed4758","source":{"kind":"arxiv","id":"1204.0013","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0013","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0013v1","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0013","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"2OAZ3HEATF35","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2OAZ3HEATF35KW4H","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2OAZ3HEA","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:2OAZ3HEATF35KW4HH5MH7W3K6O","target":"record","payload":{"canonical_record":{"source":{"id":"1204.0013","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-03-30T20:15:26Z","cross_cats_sorted":["nucl-ex"],"title_canon_sha256":"baf4b5cfeb53592b316ecfa240c3e186daad6c1f77bca638cc6266b75c86bd0f","abstract_canon_sha256":"2fc4c96df37177b08b84e9a5cbd6d6e49ee53452cd6afad4c27372804177d6e9"},"schema_version":"1.0"},"canonical_sha256":"d3819d9c809977d55b873f587fdb6af38025d60c5e87d3fac1f85c1a32ed4758","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:26:53.011715Z","signature_b64":"uKl5A+jgxTTt0EJ/wpONNqW0XFCRzULi+GlKYSe+Q4iL7qExlaCntA9iFe2q26deh3WM8Hxabl6j29LgQUDmDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3819d9c809977d55b873f587fdb6af38025d60c5e87d3fac1f85c1a32ed4758","last_reissued_at":"2026-05-18T03:26:53.011057Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:26:53.011057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.0013","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":"2026-05-18T03:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"alVhHYinDD20/SqEMG1IYzB0jGqauhmP2SVCsPSTGzOylMa6Qr2OEZIyLl16rOLie043ij6zmA76Q0ucZ82rBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:12:07.229251Z"},"content_sha256":"33348a60d187c2daeaa44d78f954ec26028254ff68816b2c174376a9e58a8ed0","schema_version":"1.0","event_id":"sha256:33348a60d187c2daeaa44d78f954ec26028254ff68816b2c174376a9e58a8ed0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:2OAZ3HEATF35KW4HH5MH7W3K6O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Determination of the Weak Axial Vector Coupling from a Measurement of the Beta-Asymmetry Parameter A in Neutron Beta Decay","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"hep-ex","authors_text":"A. Petoukhov, B. Maerkisch, D. Mund, H. Abele, J. Krempel, M. Deissenroth, M. Schumann, T. Soldner","submitted_at":"2012-03-30T20:15:26Z","abstract_excerpt":"We report on a new measurement of the neutron beta-asymmetry parameter $A$ with the instrument \\perkeo. Main advancements are the high neutron polarization of $P = 99.7(1)%$ from a novel arrangement of super mirror polarizers and reduced background from improvements in beam line and shielding. Leading corrections were thus reduced by a factor of 4, pushing them below the level of statistical error and resulting in a significant reduction of systematic uncertainty compared to our previous experiments. From the result $A_0 = -0.11996(58)$, we derive the ratio of the axial-vector to the vector co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0013","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":"2026-05-18T03:26:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aIhHCEQ+WEYIW8TUKyI1khNgTI3Ms0uuX9BEGMoKHS3CzajUFbQXCpIeBEjeHrWfmDV6Ac0deV8S91OT/yjkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:12:07.229958Z"},"content_sha256":"8523d11fc633c8b8ddaa475c8e0cb83330d4e1356122955cd6b258a035412852","schema_version":"1.0","event_id":"sha256:8523d11fc633c8b8ddaa475c8e0cb83330d4e1356122955cd6b258a035412852"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/bundle.json","state_url":"https://pith.science/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/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":"2026-05-27T13:12:07Z","links":{"resolver":"https://pith.science/pith/2OAZ3HEATF35KW4HH5MH7W3K6O","bundle":"https://pith.science/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/bundle.json","state":"https://pith.science/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2OAZ3HEATF35KW4HH5MH7W3K6O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2OAZ3HEATF35KW4HH5MH7W3K6O","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":"2fc4c96df37177b08b84e9a5cbd6d6e49ee53452cd6afad4c27372804177d6e9","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-03-30T20:15:26Z","title_canon_sha256":"baf4b5cfeb53592b316ecfa240c3e186daad6c1f77bca638cc6266b75c86bd0f"},"schema_version":"1.0","source":{"id":"1204.0013","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0013","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0013v1","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0013","created_at":"2026-05-18T03:26:53Z"},{"alias_kind":"pith_short_12","alias_value":"2OAZ3HEATF35","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2OAZ3HEATF35KW4H","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2OAZ3HEA","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:8523d11fc633c8b8ddaa475c8e0cb83330d4e1356122955cd6b258a035412852","target":"graph","created_at":"2026-05-18T03:26:53Z","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 report on a new measurement of the neutron beta-asymmetry parameter $A$ with the instrument \\perkeo. Main advancements are the high neutron polarization of $P = 99.7(1)%$ from a novel arrangement of super mirror polarizers and reduced background from improvements in beam line and shielding. Leading corrections were thus reduced by a factor of 4, pushing them below the level of statistical error and resulting in a significant reduction of systematic uncertainty compared to our previous experiments. From the result $A_0 = -0.11996(58)$, we derive the ratio of the axial-vector to the vector co","authors_text":"A. Petoukhov, B. Maerkisch, D. Mund, H. Abele, J. Krempel, M. Deissenroth, M. Schumann, T. Soldner","cross_cats":["nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-03-30T20:15:26Z","title":"Determination of the Weak Axial Vector Coupling from a Measurement of the Beta-Asymmetry Parameter A in Neutron Beta Decay"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0013","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":"sha256:33348a60d187c2daeaa44d78f954ec26028254ff68816b2c174376a9e58a8ed0","target":"record","created_at":"2026-05-18T03:26:53Z","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":"2fc4c96df37177b08b84e9a5cbd6d6e49ee53452cd6afad4c27372804177d6e9","cross_cats_sorted":["nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2012-03-30T20:15:26Z","title_canon_sha256":"baf4b5cfeb53592b316ecfa240c3e186daad6c1f77bca638cc6266b75c86bd0f"},"schema_version":"1.0","source":{"id":"1204.0013","kind":"arxiv","version":1}},"canonical_sha256":"d3819d9c809977d55b873f587fdb6af38025d60c5e87d3fac1f85c1a32ed4758","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3819d9c809977d55b873f587fdb6af38025d60c5e87d3fac1f85c1a32ed4758","first_computed_at":"2026-05-18T03:26:53.011057Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:26:53.011057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uKl5A+jgxTTt0EJ/wpONNqW0XFCRzULi+GlKYSe+Q4iL7qExlaCntA9iFe2q26deh3WM8Hxabl6j29LgQUDmDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:26:53.011715Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.0013","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33348a60d187c2daeaa44d78f954ec26028254ff68816b2c174376a9e58a8ed0","sha256:8523d11fc633c8b8ddaa475c8e0cb83330d4e1356122955cd6b258a035412852"],"state_sha256":"8e4e8144b5857b4d052aedfd0791bc518c42fe658a5f460d527f4a6e6a800f3e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WxqcSiASnpVUz1VPc/R7hUNSmc9TxqkYDSZU+OSp4zjLrkQYuVvUheahpoC8L+cJCCTw7dDS37pn143t3l9cDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:12:07.233584Z","bundle_sha256":"5ddd97bd1e46754ef5e2c16f1e3a0c310937ad6ea5182a6e540641d141c7aaa5"}}