{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:3BE6L2UOB5O7BK66ULEKGJW2WJ","short_pith_number":"pith:3BE6L2UO","canonical_record":{"source":{"id":"hep-ex/0103030","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2001-03-20T14:11:37Z","cross_cats_sorted":[],"title_canon_sha256":"a2092e7757318cdd8514f2a60b3dcb7e2d7c5748e9a698eedab7972ecef10c91","abstract_canon_sha256":"8f3619675b5387caed54bd9dab4341469b3cc047024e0c7606a3a6683850e3d2"},"schema_version":"1.0"},"canonical_sha256":"d849e5ea8e0f5df0abdea2c8a326dab264447197a9e6c76580dd233d884ffdd5","source":{"kind":"arxiv","id":"hep-ex/0103030","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0103030","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0103030v1","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0103030","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"pith_short_12","alias_value":"3BE6L2UOB5O7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3BE6L2UOB5O7BK66","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3BE6L2UO","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:3BE6L2UOB5O7BK66ULEKGJW2WJ","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ex/0103030","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ex","submitted_at":"2001-03-20T14:11:37Z","cross_cats_sorted":[],"title_canon_sha256":"a2092e7757318cdd8514f2a60b3dcb7e2d7c5748e9a698eedab7972ecef10c91","abstract_canon_sha256":"8f3619675b5387caed54bd9dab4341469b3cc047024e0c7606a3a6683850e3d2"},"schema_version":"1.0"},"canonical_sha256":"d849e5ea8e0f5df0abdea2c8a326dab264447197a9e6c76580dd233d884ffdd5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:40.599460Z","signature_b64":"FAyYYiYRMeQyaIVXFTK7oH5j0KE94axFETNndTm6Ac5ffCf7T/JBhgf7HmuSx9Kz12w9JCJh3bQrT7f9hRwLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d849e5ea8e0f5df0abdea2c8a326dab264447197a9e6c76580dd233d884ffdd5","last_reissued_at":"2026-05-18T03:47:40.598998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:40.598998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ex/0103030","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":"2026-05-18T03:47:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hJj9sEDiA0r+O+hgKsWByy5J3LxbaqW5RWIZ4a3MtYUXXYBqOVSF2axDHTEFY1YBpYrSy8LZTJpVNxHiED77Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:40:59.455030Z"},"content_sha256":"b66381755d192631449c9ee2e6f90b27ee462e94b4b4e4a20d07ebba232fcf72","schema_version":"1.0","event_id":"sha256:b66381755d192631449c9ee2e6f90b27ee462e94b4b4e4a20d07ebba232fcf72"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:3BE6L2UOB5O7BK66ULEKGJW2WJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Measurement of the $\\bar d / \\bar u$ Asymmetry in the Nucleon Sea","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al, FNAL E866/NuSea Collaboration: R. S. Towell, P. L. McGaughey","submitted_at":"2001-03-20T14:11:37Z","abstract_excerpt":"Measurements of the ratio of Drell-Yan yields from an 800 \\rm{GeV/c} proton beam incident on liquid hydrogen and deuterium targets are reported. Approximately 360,000 Drell-Yan muon pairs remained after all cuts on the data.\n  From these data, the ratio of anti-down ($\\bar{d}$) to anti-up ($\\bar{u}$) quark distributions in the proton sea is determined over a wide range in Bjorken-$x$. These results confirm previous measurements by E866 and extend them to lower $x$. From these data, $(\\bar{d}-\\bar{u})$ and $\\int(\\bar{d}-\\bar{u})dx$ are evaluated for $0.015<x<0.35$. These results are compared wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0103030","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":"2026-05-18T03:47:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xcmGiy0heT9XyiwGn3GsOmhXPwvtnH8XWWOsyNE70f8jdhOkmDwI3e7oVUrlEZTCuHkH49S8fOXv6Oi6G6TPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:40:59.455666Z"},"content_sha256":"42d2e4419ac91ade70815a44b572b308d37907e0d300765d3b1de6c261876240","schema_version":"1.0","event_id":"sha256:42d2e4419ac91ade70815a44b572b308d37907e0d300765d3b1de6c261876240"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/bundle.json","state_url":"https://pith.science/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/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":"2026-05-23T00:40:59Z","links":{"resolver":"https://pith.science/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ","bundle":"https://pith.science/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/bundle.json","state":"https://pith.science/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3BE6L2UOB5O7BK66ULEKGJW2WJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:3BE6L2UOB5O7BK66ULEKGJW2WJ","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":"8f3619675b5387caed54bd9dab4341469b3cc047024e0c7606a3a6683850e3d2","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2001-03-20T14:11:37Z","title_canon_sha256":"a2092e7757318cdd8514f2a60b3dcb7e2d7c5748e9a698eedab7972ecef10c91"},"schema_version":"1.0","source":{"id":"hep-ex/0103030","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ex/0103030","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ex/0103030v1","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ex/0103030","created_at":"2026-05-18T03:47:40Z"},{"alias_kind":"pith_short_12","alias_value":"3BE6L2UOB5O7","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3BE6L2UOB5O7BK66","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3BE6L2UO","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:42d2e4419ac91ade70815a44b572b308d37907e0d300765d3b1de6c261876240","target":"graph","created_at":"2026-05-18T03:47:40Z","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":"Measurements of the ratio of Drell-Yan yields from an 800 \\rm{GeV/c} proton beam incident on liquid hydrogen and deuterium targets are reported. Approximately 360,000 Drell-Yan muon pairs remained after all cuts on the data.\n  From these data, the ratio of anti-down ($\\bar{d}$) to anti-up ($\\bar{u}$) quark distributions in the proton sea is determined over a wide range in Bjorken-$x$. These results confirm previous measurements by E866 and extend them to lower $x$. From these data, $(\\bar{d}-\\bar{u})$ and $\\int(\\bar{d}-\\bar{u})dx$ are evaluated for $0.015<x<0.35$. These results are compared wi","authors_text":"et al, FNAL E866/NuSea Collaboration: R. S. Towell, P. L. McGaughey","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ex","submitted_at":"2001-03-20T14:11:37Z","title":"Improved Measurement of the $\\bar d / \\bar u$ Asymmetry in the Nucleon Sea"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0103030","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:b66381755d192631449c9ee2e6f90b27ee462e94b4b4e4a20d07ebba232fcf72","target":"record","created_at":"2026-05-18T03:47:40Z","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":"8f3619675b5387caed54bd9dab4341469b3cc047024e0c7606a3a6683850e3d2","cross_cats_sorted":[],"license":"","primary_cat":"hep-ex","submitted_at":"2001-03-20T14:11:37Z","title_canon_sha256":"a2092e7757318cdd8514f2a60b3dcb7e2d7c5748e9a698eedab7972ecef10c91"},"schema_version":"1.0","source":{"id":"hep-ex/0103030","kind":"arxiv","version":1}},"canonical_sha256":"d849e5ea8e0f5df0abdea2c8a326dab264447197a9e6c76580dd233d884ffdd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d849e5ea8e0f5df0abdea2c8a326dab264447197a9e6c76580dd233d884ffdd5","first_computed_at":"2026-05-18T03:47:40.598998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:47:40.598998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FAyYYiYRMeQyaIVXFTK7oH5j0KE94axFETNndTm6Ac5ffCf7T/JBhgf7HmuSx9Kz12w9JCJh3bQrT7f9hRwLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:47:40.599460Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ex/0103030","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b66381755d192631449c9ee2e6f90b27ee462e94b4b4e4a20d07ebba232fcf72","sha256:42d2e4419ac91ade70815a44b572b308d37907e0d300765d3b1de6c261876240"],"state_sha256":"06d4fc28f32444286b35ec32bae9a164b0350fbad6c17c6ae5e05fce81bd56c8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZQ7aXGQfjTTX5a6E4/YWSr09+eNeIQPjMLGYe+drnzL5LDunocwdPZM7fl2e6U/oG4mO69snDHRUf/8ekWjFCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T00:40:59.459365Z","bundle_sha256":"05b4f106d39340dcca7398e383761659e5a475a39a5653fcae1444ac17734889"}}