{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:ZUHMF2HPJU7BZNNH34J6PGNECH","short_pith_number":"pith:ZUHMF2HP","canonical_record":{"source":{"id":"2108.05822","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-12T16:05:41Z","cross_cats_sorted":["hep-ex","hep-lat","nucl-th"],"title_canon_sha256":"f6d75751b32e2dbd6f17e8d132ee97939f7bdb5235b854bb946a3ea09c4c65eb","abstract_canon_sha256":"655f680f8cb7ca73cc4cfb7d5954d6f1164a9de183a7f421135990f687aa9b7a"},"schema_version":"1.0"},"canonical_sha256":"cd0ec2e8ef4d3e1cb5a7df13e799a411f7323ef3a3d3bd4d3cdf167705bedcce","source":{"kind":"arxiv","id":"2108.05822","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.05822","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"arxiv_version","alias_value":"2108.05822v2","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.05822","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZUHMF2HPJU7B","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_16","alias_value":"ZUHMF2HPJU7BZNNH","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_8","alias_value":"ZUHMF2HP","created_at":"2026-07-05T03:36:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:ZUHMF2HPJU7BZNNH34J6PGNECH","target":"record","payload":{"canonical_record":{"source":{"id":"2108.05822","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-12T16:05:41Z","cross_cats_sorted":["hep-ex","hep-lat","nucl-th"],"title_canon_sha256":"f6d75751b32e2dbd6f17e8d132ee97939f7bdb5235b854bb946a3ea09c4c65eb","abstract_canon_sha256":"655f680f8cb7ca73cc4cfb7d5954d6f1164a9de183a7f421135990f687aa9b7a"},"schema_version":"1.0"},"canonical_sha256":"cd0ec2e8ef4d3e1cb5a7df13e799a411f7323ef3a3d3bd4d3cdf167705bedcce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:36:11.370259Z","signature_b64":"JWeTAWugXitsb200seB8RDI0LF3TZz64nBR8cmWSJ4QjKIqJr30N6bMuF7SeSD3yYNr2PDTpmQZQKxmPWHxuAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd0ec2e8ef4d3e1cb5a7df13e799a411f7323ef3a3d3bd4d3cdf167705bedcce","last_reissued_at":"2026-07-05T03:36:11.369786Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:36:11.369786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.05822","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":"2026-07-05T03:36:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rO7GyidoAgjTJflZl9jc+awole+/spu+VuR2m5WlcShDy/yMOaMgdR+/2+0FGjOa45mXxdhJTcrTP72zA9RhDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T14:20:38.636796Z"},"content_sha256":"1f91ecacd733476af3c74e2f6ce0ce26a298e3dac35fb2ac4916329f6af9f610","schema_version":"1.0","event_id":"sha256:1f91ecacd733476af3c74e2f6ce0ce26a298e3dac35fb2ac4916329f6af9f610"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:ZUHMF2HPJU7BZNNH34J6PGNECH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Global QCD Analysis of Pion Parton Distributions with Threshold Resummation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Chueng-Ryong Ji, N. Sato, P. C. Barry, W. Melnitchouk","submitted_at":"2021-08-12T16:05:41Z","abstract_excerpt":"We perform the first global QCD analysis of pion valence, sea quark, and gluon distributions within a Bayesian Monte Carlo framework with threshold resummation on Drell-Yan cross sections at next-to-leading log accuracy. Exploring various treatments of resummation, we find that the large-$x$ asymptotics of the valence quark distribution $\\sim (1-x)^{\\beta_v}$ can differ significantly, with $\\beta_v$ ranging from $\\approx 1$ to $> 2.5$ at the input scale. Regardless of the specific implementation, however, the resummation induced redistribution of the momentum between valence quarks and gluons "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.05822","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/2108.05822/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":"2026-07-05T03:36:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l/jcvaj0tXSvYV+9POk69JIQsAXamb/k66tRVoSigeXfzXRts0dWQbTcY4DuQRHtBnRckBOcOClu3iArKK7FBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T14:20:38.637423Z"},"content_sha256":"556ed5070489bbcc9b5901edc914b7f58582a8f95a847d896b3bbeb8cfb436ab","schema_version":"1.0","event_id":"sha256:556ed5070489bbcc9b5901edc914b7f58582a8f95a847d896b3bbeb8cfb436ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/bundle.json","state_url":"https://pith.science/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/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":"2026-08-06T14:20:38Z","links":{"resolver":"https://pith.science/pith/ZUHMF2HPJU7BZNNH34J6PGNECH","bundle":"https://pith.science/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/bundle.json","state":"https://pith.science/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZUHMF2HPJU7BZNNH34J6PGNECH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:ZUHMF2HPJU7BZNNH34J6PGNECH","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":"655f680f8cb7ca73cc4cfb7d5954d6f1164a9de183a7f421135990f687aa9b7a","cross_cats_sorted":["hep-ex","hep-lat","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-12T16:05:41Z","title_canon_sha256":"f6d75751b32e2dbd6f17e8d132ee97939f7bdb5235b854bb946a3ea09c4c65eb"},"schema_version":"1.0","source":{"id":"2108.05822","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.05822","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"arxiv_version","alias_value":"2108.05822v2","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.05822","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZUHMF2HPJU7B","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_16","alias_value":"ZUHMF2HPJU7BZNNH","created_at":"2026-07-05T03:36:11Z"},{"alias_kind":"pith_short_8","alias_value":"ZUHMF2HP","created_at":"2026-07-05T03:36:11Z"}],"graph_snapshots":[{"event_id":"sha256:556ed5070489bbcc9b5901edc914b7f58582a8f95a847d896b3bbeb8cfb436ab","target":"graph","created_at":"2026-07-05T03:36:11Z","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/2108.05822/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We perform the first global QCD analysis of pion valence, sea quark, and gluon distributions within a Bayesian Monte Carlo framework with threshold resummation on Drell-Yan cross sections at next-to-leading log accuracy. Exploring various treatments of resummation, we find that the large-$x$ asymptotics of the valence quark distribution $\\sim (1-x)^{\\beta_v}$ can differ significantly, with $\\beta_v$ ranging from $\\approx 1$ to $> 2.5$ at the input scale. Regardless of the specific implementation, however, the resummation induced redistribution of the momentum between valence quarks and gluons ","authors_text":"Chueng-Ryong Ji, N. Sato, P. C. Barry, W. Melnitchouk","cross_cats":["hep-ex","hep-lat","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-12T16:05:41Z","title":"Global QCD Analysis of Pion Parton Distributions with Threshold Resummation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.05822","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":"sha256:1f91ecacd733476af3c74e2f6ce0ce26a298e3dac35fb2ac4916329f6af9f610","target":"record","created_at":"2026-07-05T03:36:11Z","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":"655f680f8cb7ca73cc4cfb7d5954d6f1164a9de183a7f421135990f687aa9b7a","cross_cats_sorted":["hep-ex","hep-lat","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-12T16:05:41Z","title_canon_sha256":"f6d75751b32e2dbd6f17e8d132ee97939f7bdb5235b854bb946a3ea09c4c65eb"},"schema_version":"1.0","source":{"id":"2108.05822","kind":"arxiv","version":2}},"canonical_sha256":"cd0ec2e8ef4d3e1cb5a7df13e799a411f7323ef3a3d3bd4d3cdf167705bedcce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd0ec2e8ef4d3e1cb5a7df13e799a411f7323ef3a3d3bd4d3cdf167705bedcce","first_computed_at":"2026-07-05T03:36:11.369786Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:36:11.369786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JWeTAWugXitsb200seB8RDI0LF3TZz64nBR8cmWSJ4QjKIqJr30N6bMuF7SeSD3yYNr2PDTpmQZQKxmPWHxuAw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:36:11.370259Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.05822","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f91ecacd733476af3c74e2f6ce0ce26a298e3dac35fb2ac4916329f6af9f610","sha256:556ed5070489bbcc9b5901edc914b7f58582a8f95a847d896b3bbeb8cfb436ab"],"state_sha256":"f796aecd3bd2f1631c8a136d20fe333e29191baeea0a35cc4817601fe112846a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3HWovjJEIbAPH9lNKWjQsuA/IWcRxgJtWfNFmkTnCYRpudld9WHYJe4dPecMeOdckUO+ZJOSnxBUy9YdVEsoDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T14:20:38.648408Z","bundle_sha256":"51d5d90f0689904ce07eb0fa630e19a739131c7e69277c0c897099368c75f689"}}