{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:QRHWZ4RGSHFEBGXR27YMYFTTTU","short_pith_number":"pith:QRHWZ4RG","canonical_record":{"source":{"id":"nucl-ex/0402018","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"2004-02-25T09:28:59Z","cross_cats_sorted":[],"title_canon_sha256":"96a6470e0a97d6bfa5bb83ce0ee34071392e9e9ae9aa331cf8e7800755c743c2","abstract_canon_sha256":"fffe5f8826fd8b308712b5ad520abc0f6fd8ff989f29868bdf918c5f514423e9"},"schema_version":"1.0"},"canonical_sha256":"844f6cf22691ca409af1d7f0cc16739d0d1eb3997268f2c86d5fa46f9d8feacb","source":{"kind":"arxiv","id":"nucl-ex/0402018","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0402018","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0402018v1","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0402018","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_12","alias_value":"QRHWZ4RGSHFE","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_16","alias_value":"QRHWZ4RGSHFEBGXR","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_8","alias_value":"QRHWZ4RG","created_at":"2026-07-04T15:20:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:QRHWZ4RGSHFEBGXR27YMYFTTTU","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-ex/0402018","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"2004-02-25T09:28:59Z","cross_cats_sorted":[],"title_canon_sha256":"96a6470e0a97d6bfa5bb83ce0ee34071392e9e9ae9aa331cf8e7800755c743c2","abstract_canon_sha256":"fffe5f8826fd8b308712b5ad520abc0f6fd8ff989f29868bdf918c5f514423e9"},"schema_version":"1.0"},"canonical_sha256":"844f6cf22691ca409af1d7f0cc16739d0d1eb3997268f2c86d5fa46f9d8feacb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:20:34.794385Z","signature_b64":"HJaTHcn2QkkY7XQVKbLGDw6Neo28r1PAZlFdk3xqsvBDq44S6PbYNmiZ9PczsT1u62WFn3I87MLeUei1pzzXAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"844f6cf22691ca409af1d7f0cc16739d0d1eb3997268f2c86d5fa46f9d8feacb","last_reissued_at":"2026-07-04T15:20:34.793807Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:20:34.793807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-ex/0402018","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":"2026-07-04T15:20:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R9j/94OIXofDc6GTFMNn51MiJS7ewOJL/REHw2Afd8s3WBXF4Eae1TcGauciZgm6AmzmvHCu3xb4B7ClL+YrBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:49:31.711961Z"},"content_sha256":"c9c457e2580c7a18093ca942120fb5309e010b0557ab7c9582e3f9fe9c10cd34","schema_version":"1.0","event_id":"sha256:c9c457e2580c7a18093ca942120fb5309e010b0557ab7c9582e3f9fe9c10cd34"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:QRHWZ4RGSHFEBGXR27YMYFTTTU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low Energy Analyzing Powers in Pion-Proton Elastic Scattering","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Erhardt, B. van den Brandt, E. Friedman, F. von Wrochem, G. J. Hofman, G. J. Wagner, H. Clement, H. Denz, J. A. Konter, J. Breitschopf, J. Gr\\\"ater, J. P\\\"atzold, J. R. Comfort, K. F\\\"ohl, M. Cr\\\"oni, M. M. Pavan, P. Hautle, R. Bilger, R. Meier, S. Mango","submitted_at":"2004-02-25T09:28:59Z","abstract_excerpt":"Analyzing powers of pion-proton elastic scattering have been measured at PSI with the Low Energy Pion Spectrometer LEPS as well as a novel polarized scintillator target. Angular distributions between 40 and 120 deg (c.m.) were taken at 45.2, 51.2, 57.2, 68.5, 77.2, and 87.2 MeV incoming pion kinetic energy for pi+ p scattering, and at 67.3 and 87.2 MeV for pi- p scattering. These new measurements constitute a substantial extension of the polarization data base at low energies. Predictions from phase shift analyses are compared with the experimental results, and deviations are observed at low e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0402018","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/nucl-ex/0402018/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:20:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bSN1OGRn0lrOUhuszlHNj7/I05vr/+h9EBd8sEOhutT+afO4YSvUAB4BmmeYIcnIZQY9HJ2Uh6NG9g2S+bbUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:49:31.712627Z"},"content_sha256":"2c01ce91b830fb529af331d6875d092e8b2222bef13cb45d1d93f42cc037d3d7","schema_version":"1.0","event_id":"sha256:2c01ce91b830fb529af331d6875d092e8b2222bef13cb45d1d93f42cc037d3d7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/bundle.json","state_url":"https://pith.science/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/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":"2026-07-07T14:49:31Z","links":{"resolver":"https://pith.science/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU","bundle":"https://pith.science/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/bundle.json","state":"https://pith.science/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QRHWZ4RGSHFEBGXR27YMYFTTTU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:QRHWZ4RGSHFEBGXR27YMYFTTTU","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":"fffe5f8826fd8b308712b5ad520abc0f6fd8ff989f29868bdf918c5f514423e9","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2004-02-25T09:28:59Z","title_canon_sha256":"96a6470e0a97d6bfa5bb83ce0ee34071392e9e9ae9aa331cf8e7800755c743c2"},"schema_version":"1.0","source":{"id":"nucl-ex/0402018","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0402018","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0402018v1","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0402018","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_12","alias_value":"QRHWZ4RGSHFE","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_16","alias_value":"QRHWZ4RGSHFEBGXR","created_at":"2026-07-04T15:20:34Z"},{"alias_kind":"pith_short_8","alias_value":"QRHWZ4RG","created_at":"2026-07-04T15:20:34Z"}],"graph_snapshots":[{"event_id":"sha256:2c01ce91b830fb529af331d6875d092e8b2222bef13cb45d1d93f42cc037d3d7","target":"graph","created_at":"2026-07-04T15:20:34Z","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-ex/0402018/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Analyzing powers of pion-proton elastic scattering have been measured at PSI with the Low Energy Pion Spectrometer LEPS as well as a novel polarized scintillator target. Angular distributions between 40 and 120 deg (c.m.) were taken at 45.2, 51.2, 57.2, 68.5, 77.2, and 87.2 MeV incoming pion kinetic energy for pi+ p scattering, and at 67.3 and 87.2 MeV for pi- p scattering. These new measurements constitute a substantial extension of the polarization data base at low energies. Predictions from phase shift analyses are compared with the experimental results, and deviations are observed at low e","authors_text":"A. Erhardt, B. van den Brandt, E. Friedman, F. von Wrochem, G. J. Hofman, G. J. Wagner, H. Clement, H. Denz, J. A. Konter, J. Breitschopf, J. Gr\\\"ater, J. P\\\"atzold, J. R. Comfort, K. F\\\"ohl, M. Cr\\\"oni, M. M. Pavan, P. Hautle, R. Bilger, R. Meier, S. Mango","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-ex","submitted_at":"2004-02-25T09:28:59Z","title":"Low Energy Analyzing Powers in Pion-Proton Elastic Scattering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0402018","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:c9c457e2580c7a18093ca942120fb5309e010b0557ab7c9582e3f9fe9c10cd34","target":"record","created_at":"2026-07-04T15:20:34Z","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":"fffe5f8826fd8b308712b5ad520abc0f6fd8ff989f29868bdf918c5f514423e9","cross_cats_sorted":[],"license":"","primary_cat":"nucl-ex","submitted_at":"2004-02-25T09:28:59Z","title_canon_sha256":"96a6470e0a97d6bfa5bb83ce0ee34071392e9e9ae9aa331cf8e7800755c743c2"},"schema_version":"1.0","source":{"id":"nucl-ex/0402018","kind":"arxiv","version":1}},"canonical_sha256":"844f6cf22691ca409af1d7f0cc16739d0d1eb3997268f2c86d5fa46f9d8feacb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"844f6cf22691ca409af1d7f0cc16739d0d1eb3997268f2c86d5fa46f9d8feacb","first_computed_at":"2026-07-04T15:20:34.793807Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:20:34.793807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HJaTHcn2QkkY7XQVKbLGDw6Neo28r1PAZlFdk3xqsvBDq44S6PbYNmiZ9PczsT1u62WFn3I87MLeUei1pzzXAA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:20:34.794385Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-ex/0402018","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9c457e2580c7a18093ca942120fb5309e010b0557ab7c9582e3f9fe9c10cd34","sha256:2c01ce91b830fb529af331d6875d092e8b2222bef13cb45d1d93f42cc037d3d7"],"state_sha256":"4edb4c36db60942db2d8fb551a7b563ac9f53b9a545957528f1f4459ec3a667a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jt8VFTTeR8J4gogy+WzZEKKi+zJSM5J9yw5WG0kPHonB/NzC+/nyd6Oj3Af7+WQNSc9HKGhLsFSxbym7r5NBBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T14:49:31.715647Z","bundle_sha256":"9f7ffb8dcb37d23f4a4c45eb8d0d665a1823fe86584c24243b186f0e1eb47081"}}