{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:NUFAWZEYKN7L4GDUSQN4RAOW4U","short_pith_number":"pith:NUFAWZEY","canonical_record":{"source":{"id":"hep-ph/9906418","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1999-06-17T16:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"e55c829a35a57582d5a8cdf82ce2d0d179f5d0d20e8dee57223801517fb06dd2","abstract_canon_sha256":"6868552745d6f21f19422d3db76607f34a9cdb934ea76d9eadd0286f9b3d213e"},"schema_version":"1.0"},"canonical_sha256":"6d0a0b6498537ebe1874941bc881d6e51df5833337a067925b79a049565a48ad","source":{"kind":"arxiv","id":"hep-ph/9906418","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9906418","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9906418v1","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9906418","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"pith_short_12","alias_value":"NUFAWZEYKN7L","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"NUFAWZEYKN7L4GDU","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"NUFAWZEY","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:NUFAWZEYKN7L4GDUSQN4RAOW4U","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/9906418","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1999-06-17T16:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"e55c829a35a57582d5a8cdf82ce2d0d179f5d0d20e8dee57223801517fb06dd2","abstract_canon_sha256":"6868552745d6f21f19422d3db76607f34a9cdb934ea76d9eadd0286f9b3d213e"},"schema_version":"1.0"},"canonical_sha256":"6d0a0b6498537ebe1874941bc881d6e51df5833337a067925b79a049565a48ad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:13:17.370005Z","signature_b64":"4d63mS9vkzlvDZZ8LVkXZSEuJ3GSVzxyY9dek9s6ofGIz7wLm1AOEHJ0CsEcGU2EYsJDJvRbhCAxrs8VZ8rhBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d0a0b6498537ebe1874941bc881d6e51df5833337a067925b79a049565a48ad","last_reissued_at":"2026-05-18T04:13:17.369601Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:13:17.369601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/9906418","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":"2026-05-18T04:13:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0VayPB7G26JbCcl4myPEEONeeNE49iMT4Jb/NaaLTpIEdwNf0gTd1MB/mIfbj83S8YbtW3aOpB9SMwUvlkRVBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:52:14.561209Z"},"content_sha256":"dfa11ae048ea03e91086b3830a72504f0a6efbdaf8ac3fd0a88fd9b3df604019","schema_version":"1.0","event_id":"sha256:dfa11ae048ea03e91086b3830a72504f0a6efbdaf8ac3fd0a88fd9b3df604019"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:NUFAWZEYKN7L4GDUSQN4RAOW4U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Predictions for single spin asymmetries in lepton + p(transv. polarized) -> pion + X and gamma^* + p(transv. polarized) -> pion + X","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"(2) Vrije Universiteit, (3) Lulea University of Technology, (4) INFN, Amsterdam, Cagliari, F. Murgia (4) ((1) University, INFN, Italy, Italy), J. Hansson (3), Lulea, M. Anselmino (1), M. Boglione (2), Sweden, The Netherlands, Torino, University","submitted_at":"1999-06-17T16:50:40Z","abstract_excerpt":"Predictions for the single transverse spin asymmetry A_N in semi-inclusive DIS processes are given; non negligible values of A_N may arise from spin effects in the fragmentation of a polarized quark into a final hadron with a transverse momentum k_T with respect to the jet axis, the so-called Collins effect. The elementary single spin asymmetry of the fragmenting quark has been fixed in a previous paper, by fitting data on p(transv. polarized) + P -> pion + X, and the predictions given here are uniquely based on the assumption that the Collins effect is the only cause of the observed single sp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9906418","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":"2026-05-18T04:13:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4XIiNLkXNGq3vGcRvIFSrhqCr7BVjCS770Q2G5KEngLhVBrbBRWvxX5S/N/2Mi2sfDE6uAQcf0CUp5FicRt9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:52:14.561645Z"},"content_sha256":"5121651d722b383ee0f6d28f4987940185326ef4bea63aee866fd759eadc5993","schema_version":"1.0","event_id":"sha256:5121651d722b383ee0f6d28f4987940185326ef4bea63aee866fd759eadc5993"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/bundle.json","state_url":"https://pith.science/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/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":"2026-06-01T02:52:14Z","links":{"resolver":"https://pith.science/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U","bundle":"https://pith.science/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/bundle.json","state":"https://pith.science/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NUFAWZEYKN7L4GDUSQN4RAOW4U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:NUFAWZEYKN7L4GDUSQN4RAOW4U","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":"6868552745d6f21f19422d3db76607f34a9cdb934ea76d9eadd0286f9b3d213e","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1999-06-17T16:50:40Z","title_canon_sha256":"e55c829a35a57582d5a8cdf82ce2d0d179f5d0d20e8dee57223801517fb06dd2"},"schema_version":"1.0","source":{"id":"hep-ph/9906418","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9906418","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9906418v1","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9906418","created_at":"2026-05-18T04:13:17Z"},{"alias_kind":"pith_short_12","alias_value":"NUFAWZEYKN7L","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"NUFAWZEYKN7L4GDU","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"NUFAWZEY","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:5121651d722b383ee0f6d28f4987940185326ef4bea63aee866fd759eadc5993","target":"graph","created_at":"2026-05-18T04:13:17Z","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":"Predictions for the single transverse spin asymmetry A_N in semi-inclusive DIS processes are given; non negligible values of A_N may arise from spin effects in the fragmentation of a polarized quark into a final hadron with a transverse momentum k_T with respect to the jet axis, the so-called Collins effect. The elementary single spin asymmetry of the fragmenting quark has been fixed in a previous paper, by fitting data on p(transv. polarized) + P -> pion + X, and the predictions given here are uniquely based on the assumption that the Collins effect is the only cause of the observed single sp","authors_text":"(2) Vrije Universiteit, (3) Lulea University of Technology, (4) INFN, Amsterdam, Cagliari, F. Murgia (4) ((1) University, INFN, Italy, Italy), J. Hansson (3), Lulea, M. Anselmino (1), M. Boglione (2), Sweden, The Netherlands, Torino, University","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1999-06-17T16:50:40Z","title":"Predictions for single spin asymmetries in lepton + p(transv. polarized) -> pion + X and gamma^* + p(transv. polarized) -> pion + X"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9906418","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:dfa11ae048ea03e91086b3830a72504f0a6efbdaf8ac3fd0a88fd9b3df604019","target":"record","created_at":"2026-05-18T04:13:17Z","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":"6868552745d6f21f19422d3db76607f34a9cdb934ea76d9eadd0286f9b3d213e","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1999-06-17T16:50:40Z","title_canon_sha256":"e55c829a35a57582d5a8cdf82ce2d0d179f5d0d20e8dee57223801517fb06dd2"},"schema_version":"1.0","source":{"id":"hep-ph/9906418","kind":"arxiv","version":1}},"canonical_sha256":"6d0a0b6498537ebe1874941bc881d6e51df5833337a067925b79a049565a48ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d0a0b6498537ebe1874941bc881d6e51df5833337a067925b79a049565a48ad","first_computed_at":"2026-05-18T04:13:17.369601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:13:17.369601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4d63mS9vkzlvDZZ8LVkXZSEuJ3GSVzxyY9dek9s6ofGIz7wLm1AOEHJ0CsEcGU2EYsJDJvRbhCAxrs8VZ8rhBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:13:17.370005Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9906418","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfa11ae048ea03e91086b3830a72504f0a6efbdaf8ac3fd0a88fd9b3df604019","sha256:5121651d722b383ee0f6d28f4987940185326ef4bea63aee866fd759eadc5993"],"state_sha256":"5ccbf8687f2d42aa5736d5c0521d24a41c64b01507defd36c48f98a66fe075a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mwfgbEfsJz2z6Mz8w7yOeV2BY1MKXB8Dfy0LUHnkc3mvQu2KmvxoHs5KnOsmmrFvlyztIuqUeK5bXgGi+sC/BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:52:14.564467Z","bundle_sha256":"5f88969ce7e91bc75a8958ab3c4160370d652642cf90affe7d42d741fd80ffea"}}