{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1994:Y5Y7NQJKKSKG6RUVHCVEGDERIG","short_pith_number":"pith:Y5Y7NQJK","canonical_record":{"source":{"id":"hep-ph/9403361","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1994-03-25T01:39:00Z","cross_cats_sorted":[],"title_canon_sha256":"83dab866873d57cb2ab63d22f723df1b78407ed2930b8d208ff20a7e45a290b0","abstract_canon_sha256":"3e4ebd93b8923de84f16cf5c18f8df9783e025947b21e5abcacb55cb68accffd"},"schema_version":"1.0"},"canonical_sha256":"c771f6c12a54946f469538aa430c91418825f915e29c982d124986528e2f05c8","source":{"kind":"arxiv","id":"hep-ph/9403361","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9403361","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9403361v2","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9403361","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"Y5Y7NQJKKSKG","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_16","alias_value":"Y5Y7NQJKKSKG6RUV","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_8","alias_value":"Y5Y7NQJK","created_at":"2026-07-04T15:50:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1994:Y5Y7NQJKKSKG6RUVHCVEGDERIG","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/9403361","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1994-03-25T01:39:00Z","cross_cats_sorted":[],"title_canon_sha256":"83dab866873d57cb2ab63d22f723df1b78407ed2930b8d208ff20a7e45a290b0","abstract_canon_sha256":"3e4ebd93b8923de84f16cf5c18f8df9783e025947b21e5abcacb55cb68accffd"},"schema_version":"1.0"},"canonical_sha256":"c771f6c12a54946f469538aa430c91418825f915e29c982d124986528e2f05c8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:50:46.097974Z","signature_b64":"Ye0TthE4BMGSdP8whWUXtlsm7yvHsz6P3/pgk59aG00IkU5Nh5WiYM3jQXwuwFN3wTfGhmv+JnypwKFVfF/WDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c771f6c12a54946f469538aa430c91418825f915e29c982d124986528e2f05c8","last_reissued_at":"2026-07-04T15:50:46.097574Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:50:46.097574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/9403361","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vrEDJjiuv85SFEwJtHkIwx6lh2pvbMpFGITcsxUXLnAWSThh10sfI3rW1cow0uEsqDTeTyRx2ABRXTDuo0LmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:52:14.369006Z"},"content_sha256":"aca695d26283365084d49f652d5e5e63101a00e290f47a02587608475f1d8f36","schema_version":"1.0","event_id":"sha256:aca695d26283365084d49f652d5e5e63101a00e290f47a02587608475f1d8f36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1994:Y5Y7NQJKKSKG6RUVHCVEGDERIG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angular Distributions in the Drell-Yan Process: A Closer Look at Higher Twist Effects","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Brandenburg, D. M\\\"uller, S. J. Brodsky, V. V. Khoze","submitted_at":"1994-03-25T01:39:00Z","abstract_excerpt":"We calculate the angular distribution of the lepton produced in the Drell-Yan reaction taking into account pion bound state effects. We work in the kinematic region where one of the pion constituents goes far off-shell, which allows us to treat the bound state problem perturbatively. We show that the angular distribution is very sensitive to the shape of the pion distribution amplitude. The model we discuss fits the data if we choose a two-humped pion distribution amplitude suggested by QCD sum rules."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9403361","kind":"arxiv","version":2},"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/hep-ph/9403361/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":"2026-07-04T15:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yZXlhcxseqro87dBBkXFMI+n8m3TPHGzSGkHOxdIPlgKPya/1vpx0/RdAx6I6W8eqVO/c5EBsyGRftTbTLkkCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:52:14.369994Z"},"content_sha256":"6afd5b5d4e20361951feea183f24f733323e91813260bf97059be51d46b29294","schema_version":"1.0","event_id":"sha256:6afd5b5d4e20361951feea183f24f733323e91813260bf97059be51d46b29294"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/bundle.json","state_url":"https://pith.science/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/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":"2026-08-12T19:52:14Z","links":{"resolver":"https://pith.science/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG","bundle":"https://pith.science/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/bundle.json","state":"https://pith.science/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y5Y7NQJKKSKG6RUVHCVEGDERIG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:Y5Y7NQJKKSKG6RUVHCVEGDERIG","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":"3e4ebd93b8923de84f16cf5c18f8df9783e025947b21e5abcacb55cb68accffd","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1994-03-25T01:39:00Z","title_canon_sha256":"83dab866873d57cb2ab63d22f723df1b78407ed2930b8d208ff20a7e45a290b0"},"schema_version":"1.0","source":{"id":"hep-ph/9403361","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9403361","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9403361v2","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9403361","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"Y5Y7NQJKKSKG","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_16","alias_value":"Y5Y7NQJKKSKG6RUV","created_at":"2026-07-04T15:50:46Z"},{"alias_kind":"pith_short_8","alias_value":"Y5Y7NQJK","created_at":"2026-07-04T15:50:46Z"}],"graph_snapshots":[{"event_id":"sha256:6afd5b5d4e20361951feea183f24f733323e91813260bf97059be51d46b29294","target":"graph","created_at":"2026-07-04T15:50:46Z","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/hep-ph/9403361/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We calculate the angular distribution of the lepton produced in the Drell-Yan reaction taking into account pion bound state effects. We work in the kinematic region where one of the pion constituents goes far off-shell, which allows us to treat the bound state problem perturbatively. We show that the angular distribution is very sensitive to the shape of the pion distribution amplitude. The model we discuss fits the data if we choose a two-humped pion distribution amplitude suggested by QCD sum rules.","authors_text":"A. Brandenburg, D. M\\\"uller, S. J. Brodsky, V. V. Khoze","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1994-03-25T01:39:00Z","title":"Angular Distributions in the Drell-Yan Process: A Closer Look at Higher Twist Effects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9403361","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:aca695d26283365084d49f652d5e5e63101a00e290f47a02587608475f1d8f36","target":"record","created_at":"2026-07-04T15:50:46Z","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":"3e4ebd93b8923de84f16cf5c18f8df9783e025947b21e5abcacb55cb68accffd","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1994-03-25T01:39:00Z","title_canon_sha256":"83dab866873d57cb2ab63d22f723df1b78407ed2930b8d208ff20a7e45a290b0"},"schema_version":"1.0","source":{"id":"hep-ph/9403361","kind":"arxiv","version":2}},"canonical_sha256":"c771f6c12a54946f469538aa430c91418825f915e29c982d124986528e2f05c8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c771f6c12a54946f469538aa430c91418825f915e29c982d124986528e2f05c8","first_computed_at":"2026-07-04T15:50:46.097574Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:50:46.097574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ye0TthE4BMGSdP8whWUXtlsm7yvHsz6P3/pgk59aG00IkU5Nh5WiYM3jQXwuwFN3wTfGhmv+JnypwKFVfF/WDg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:50:46.097974Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9403361","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aca695d26283365084d49f652d5e5e63101a00e290f47a02587608475f1d8f36","sha256:6afd5b5d4e20361951feea183f24f733323e91813260bf97059be51d46b29294"],"state_sha256":"281e955103a04bce393c51d8fb0b0cada4c718bf3c347415d7391092ed785fd1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SfBabdkPB/sf5T6mwBE6t81omvtZzmD62J2HP9Bx+n8S3SK9EXEXGWDEijfr90Fr9UDltFn9+j3xEUK4R3dCBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T19:52:14.374217Z","bundle_sha256":"5fce7600a6f73d824053aad51b98d7332b44ed80258755e748b3acbba7babd1a"}}