{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:X3M7V2ZRT3TVWALJAK2EFD2ZCW","short_pith_number":"pith:X3M7V2ZR","canonical_record":{"source":{"id":"1509.06489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T07:49:08Z","cross_cats_sorted":[],"title_canon_sha256":"ce8c3dcab7a8ef9f07968286c0ef564fd8aab1a47d7f25ecc16c72d34327d3ff","abstract_canon_sha256":"08794f3cda06367ea076aa08e01c2b59cdb33625aca74b581149e1c3e83b4431"},"schema_version":"1.0"},"canonical_sha256":"bed9faeb319ee75b016902b4428f5915982d40eac8499f76a3717abad0e71216","source":{"kind":"arxiv","id":"1509.06489","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.06489","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"arxiv_version","alias_value":"1509.06489v1","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.06489","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"pith_short_12","alias_value":"X3M7V2ZRT3TV","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"X3M7V2ZRT3TVWALJ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"X3M7V2ZR","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:X3M7V2ZRT3TVWALJAK2EFD2ZCW","target":"record","payload":{"canonical_record":{"source":{"id":"1509.06489","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T07:49:08Z","cross_cats_sorted":[],"title_canon_sha256":"ce8c3dcab7a8ef9f07968286c0ef564fd8aab1a47d7f25ecc16c72d34327d3ff","abstract_canon_sha256":"08794f3cda06367ea076aa08e01c2b59cdb33625aca74b581149e1c3e83b4431"},"schema_version":"1.0"},"canonical_sha256":"bed9faeb319ee75b016902b4428f5915982d40eac8499f76a3717abad0e71216","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:31.306840Z","signature_b64":"DaGsHfGm+uZeaRPNB/yCDlqHi038aJtamaXtZq0EcFB+yDBMbnbmyBP75tazlA2Me6c1aZVzsm825OmXgHclAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bed9faeb319ee75b016902b4428f5915982d40eac8499f76a3717abad0e71216","last_reissued_at":"2026-05-18T01:25:31.306240Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:31.306240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.06489","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":"2026-05-18T01:25:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0RYgQDCNdVFaou7ATfyFcB5uFE5XsBlZfv7+CY/B1mgjTexusIBSjzAOf+5WUOv3hhPXqx275I6LQsMibqNoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:51:19.092354Z"},"content_sha256":"30b4390f08c6149bb5b0523a46dd9027bfbcec32e1fe88ea37dd2d6cb4b5b1c8","schema_version":"1.0","event_id":"sha256:30b4390f08c6149bb5b0523a46dd9027bfbcec32e1fe88ea37dd2d6cb4b5b1c8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:X3M7V2ZRT3TVWALJAK2EFD2ZCW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unveiling the Proton Spin Decomposition at a Future Electron-Ion Collider","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Elke C. Aschenauer, M. Stratmann, R. Sassot","submitted_at":"2015-09-22T07:49:08Z","abstract_excerpt":"We present a detailed assessment of how well a future Electron-Ion Collider could constrain helicity parton distributions in the nucleon and, therefore, unveil the role of the intrinsic spin of quarks and gluons in the proton's spin budget. Any remaining deficit in this decomposition will provide the best indirect constraint on the contribution due to the total orbital angular momenta of quarks and gluons. Specifically, all our studies are performed in the context of global QCD analyses based on realistic pseudo-data and in the light of the most recent data obtained from polarized proton-proto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.06489","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":"2026-05-18T01:25:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mp48FtNi9bqV1N6/2W8jIVuY/5bEOJe2TvcORat4jQ/7aO68qJag0lLt+a4g/n358gB6P+XZ/nbAaQRKZZ9pBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:51:19.092709Z"},"content_sha256":"11ddd42e55fa8d4bbc47c31148a62e8fa0f4dcb35cd82dd21585943ff7f92b72","schema_version":"1.0","event_id":"sha256:11ddd42e55fa8d4bbc47c31148a62e8fa0f4dcb35cd82dd21585943ff7f92b72"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/bundle.json","state_url":"https://pith.science/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/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":"2026-05-31T11:51:19Z","links":{"resolver":"https://pith.science/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW","bundle":"https://pith.science/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/bundle.json","state":"https://pith.science/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3M7V2ZRT3TVWALJAK2EFD2ZCW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:X3M7V2ZRT3TVWALJAK2EFD2ZCW","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":"08794f3cda06367ea076aa08e01c2b59cdb33625aca74b581149e1c3e83b4431","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T07:49:08Z","title_canon_sha256":"ce8c3dcab7a8ef9f07968286c0ef564fd8aab1a47d7f25ecc16c72d34327d3ff"},"schema_version":"1.0","source":{"id":"1509.06489","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.06489","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"arxiv_version","alias_value":"1509.06489v1","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.06489","created_at":"2026-05-18T01:25:31Z"},{"alias_kind":"pith_short_12","alias_value":"X3M7V2ZRT3TV","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"X3M7V2ZRT3TVWALJ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"X3M7V2ZR","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:11ddd42e55fa8d4bbc47c31148a62e8fa0f4dcb35cd82dd21585943ff7f92b72","target":"graph","created_at":"2026-05-18T01:25:31Z","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 present a detailed assessment of how well a future Electron-Ion Collider could constrain helicity parton distributions in the nucleon and, therefore, unveil the role of the intrinsic spin of quarks and gluons in the proton's spin budget. Any remaining deficit in this decomposition will provide the best indirect constraint on the contribution due to the total orbital angular momenta of quarks and gluons. Specifically, all our studies are performed in the context of global QCD analyses based on realistic pseudo-data and in the light of the most recent data obtained from polarized proton-proto","authors_text":"Elke C. Aschenauer, M. Stratmann, R. Sassot","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T07:49:08Z","title":"Unveiling the Proton Spin Decomposition at a Future Electron-Ion Collider"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.06489","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":"sha256:30b4390f08c6149bb5b0523a46dd9027bfbcec32e1fe88ea37dd2d6cb4b5b1c8","target":"record","created_at":"2026-05-18T01:25:31Z","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":"08794f3cda06367ea076aa08e01c2b59cdb33625aca74b581149e1c3e83b4431","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2015-09-22T07:49:08Z","title_canon_sha256":"ce8c3dcab7a8ef9f07968286c0ef564fd8aab1a47d7f25ecc16c72d34327d3ff"},"schema_version":"1.0","source":{"id":"1509.06489","kind":"arxiv","version":1}},"canonical_sha256":"bed9faeb319ee75b016902b4428f5915982d40eac8499f76a3717abad0e71216","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bed9faeb319ee75b016902b4428f5915982d40eac8499f76a3717abad0e71216","first_computed_at":"2026-05-18T01:25:31.306240Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:31.306240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DaGsHfGm+uZeaRPNB/yCDlqHi038aJtamaXtZq0EcFB+yDBMbnbmyBP75tazlA2Me6c1aZVzsm825OmXgHclAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:31.306840Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.06489","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:30b4390f08c6149bb5b0523a46dd9027bfbcec32e1fe88ea37dd2d6cb4b5b1c8","sha256:11ddd42e55fa8d4bbc47c31148a62e8fa0f4dcb35cd82dd21585943ff7f92b72"],"state_sha256":"08588101ec518551c23d770d4e26f37998a147b1f630e4fdb49520c35a2cb5b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"icweDRXYbKZDRQFqZznO3FFoF2Ux3aj78YI7TMGdACBnZ6MOH7NOwyIrKWU5cYbZJVAkYtMVw+agwA4iPROwBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:51:19.094996Z","bundle_sha256":"39b4dda7768e2d0efdb1b2c12461e795262071f61a1d3ef3e1731ce4799bd357"}}