{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:SWNQPDHHLQVZ64BFL2BQ4P3UKZ","short_pith_number":"pith:SWNQPDHH","canonical_record":{"source":{"id":"2108.12807","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-29T10:16:53Z","cross_cats_sorted":[],"title_canon_sha256":"d57cc79484cfceccc3c3362d2a75f994fe7589950340beb54d9721af160ec676","abstract_canon_sha256":"2e705459e4f714e39a85ec4524ca4944b5ecab5f65de8e9d2cb2e54c1d466be3"},"schema_version":"1.0"},"canonical_sha256":"959b078ce75c2b9f70255e830e3f745663ae89fc7453ccfcc139b65084e07812","source":{"kind":"arxiv","id":"2108.12807","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.12807","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"arxiv_version","alias_value":"2108.12807v2","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.12807","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_12","alias_value":"SWNQPDHHLQVZ","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_16","alias_value":"SWNQPDHHLQVZ64BF","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_8","alias_value":"SWNQPDHH","created_at":"2026-07-05T05:18:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:SWNQPDHHLQVZ64BFL2BQ4P3UKZ","target":"record","payload":{"canonical_record":{"source":{"id":"2108.12807","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-29T10:16:53Z","cross_cats_sorted":[],"title_canon_sha256":"d57cc79484cfceccc3c3362d2a75f994fe7589950340beb54d9721af160ec676","abstract_canon_sha256":"2e705459e4f714e39a85ec4524ca4944b5ecab5f65de8e9d2cb2e54c1d466be3"},"schema_version":"1.0"},"canonical_sha256":"959b078ce75c2b9f70255e830e3f745663ae89fc7453ccfcc139b65084e07812","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:18:23.213593Z","signature_b64":"SMSoQ7M7vtAkCi8vPup1R/1/wHETSOUz+LM18snrPZOlz46oY0zk9zHK2wFRjkIIo7+KG3TD8SVrznmbNmoBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"959b078ce75c2b9f70255e830e3f745663ae89fc7453ccfcc139b65084e07812","last_reissued_at":"2026-07-05T05:18:23.213175Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:18:23.213175Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.12807","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":"2026-07-05T05:18:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wvc4MPZmXAMK0YX6rsurblPCmPgUVVmRZOOFtxb5+D9mLrohtVvII+9drOEn3EtIVA/8rHJC1oTFXKR6nseUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T23:30:01.794413Z"},"content_sha256":"7df9a9db5bcb912dded718eee9ffe6027dd2fecd9901c3ad37966165cc937ea3","schema_version":"1.0","event_id":"sha256:7df9a9db5bcb912dded718eee9ffe6027dd2fecd9901c3ad37966165cc937ea3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:SWNQPDHHLQVZ64BFL2BQ4P3UKZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An analysis of polarized parton distribution functions with nonlinear QCD evolution equations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Chengdong Han, Gang Xie, Rong Wang, Xurong Chen","submitted_at":"2021-08-29T10:16:53Z","abstract_excerpt":"We present the polarized parton distribution functions from a QCD analysis of the worldwide polarized deep inelastic scattering data, based on the dynamical parton distribution model. All the sea quarks and gluons are dynamically generated from QCD radiations, with the nonperturbative input contains only the polarized valence quark distributions. This approach leads to a simple parametrization, which has only four free parameters. In the analysis, we apply the DGLAP equations with parton-parton recombination corrections. The parameterized nonperturbative input at an extremely low $Q_0^2$ repro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.12807","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/2108.12807/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":"2026-07-05T05:18:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9H5HmXMFjsn9+qo3H6xJRQXZH6Hz5eARFUaf3k6xgLftKjN4+QtNDiorr1A8fZ9PTPD5Av4qYd7aPMXUZI4bCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T23:30:01.794782Z"},"content_sha256":"a681a1f28f7bca85e578ad0bae0ba1c597ae03532424043207f7f99115fc6990","schema_version":"1.0","event_id":"sha256:a681a1f28f7bca85e578ad0bae0ba1c597ae03532424043207f7f99115fc6990"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/bundle.json","state_url":"https://pith.science/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/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":"2026-07-06T23:30:01Z","links":{"resolver":"https://pith.science/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ","bundle":"https://pith.science/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/bundle.json","state":"https://pith.science/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SWNQPDHHLQVZ64BFL2BQ4P3UKZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:SWNQPDHHLQVZ64BFL2BQ4P3UKZ","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":"2e705459e4f714e39a85ec4524ca4944b5ecab5f65de8e9d2cb2e54c1d466be3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-29T10:16:53Z","title_canon_sha256":"d57cc79484cfceccc3c3362d2a75f994fe7589950340beb54d9721af160ec676"},"schema_version":"1.0","source":{"id":"2108.12807","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.12807","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"arxiv_version","alias_value":"2108.12807v2","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.12807","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_12","alias_value":"SWNQPDHHLQVZ","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_16","alias_value":"SWNQPDHHLQVZ64BF","created_at":"2026-07-05T05:18:23Z"},{"alias_kind":"pith_short_8","alias_value":"SWNQPDHH","created_at":"2026-07-05T05:18:23Z"}],"graph_snapshots":[{"event_id":"sha256:a681a1f28f7bca85e578ad0bae0ba1c597ae03532424043207f7f99115fc6990","target":"graph","created_at":"2026-07-05T05:18:23Z","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/2108.12807/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the polarized parton distribution functions from a QCD analysis of the worldwide polarized deep inelastic scattering data, based on the dynamical parton distribution model. All the sea quarks and gluons are dynamically generated from QCD radiations, with the nonperturbative input contains only the polarized valence quark distributions. This approach leads to a simple parametrization, which has only four free parameters. In the analysis, we apply the DGLAP equations with parton-parton recombination corrections. The parameterized nonperturbative input at an extremely low $Q_0^2$ repro","authors_text":"Chengdong Han, Gang Xie, Rong Wang, Xurong Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-29T10:16:53Z","title":"An analysis of polarized parton distribution functions with nonlinear QCD evolution equations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.12807","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":"sha256:7df9a9db5bcb912dded718eee9ffe6027dd2fecd9901c3ad37966165cc937ea3","target":"record","created_at":"2026-07-05T05:18:23Z","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":"2e705459e4f714e39a85ec4524ca4944b5ecab5f65de8e9d2cb2e54c1d466be3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-08-29T10:16:53Z","title_canon_sha256":"d57cc79484cfceccc3c3362d2a75f994fe7589950340beb54d9721af160ec676"},"schema_version":"1.0","source":{"id":"2108.12807","kind":"arxiv","version":2}},"canonical_sha256":"959b078ce75c2b9f70255e830e3f745663ae89fc7453ccfcc139b65084e07812","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"959b078ce75c2b9f70255e830e3f745663ae89fc7453ccfcc139b65084e07812","first_computed_at":"2026-07-05T05:18:23.213175Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:18:23.213175Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SMSoQ7M7vtAkCi8vPup1R/1/wHETSOUz+LM18snrPZOlz46oY0zk9zHK2wFRjkIIo7+KG3TD8SVrznmbNmoBBg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:18:23.213593Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.12807","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7df9a9db5bcb912dded718eee9ffe6027dd2fecd9901c3ad37966165cc937ea3","sha256:a681a1f28f7bca85e578ad0bae0ba1c597ae03532424043207f7f99115fc6990"],"state_sha256":"7968f91e6310a9c5dbdc415e4e776dc2447c97ec0dffe0ab2dc500f0954ecbda"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j4WsSxXwFW/o37B+4fsQ6szzUs39YUB+hYF7SWg0/IZEGPjqnRIJ4f1lHwr43dbMjhRDU/MKsk5javjbDzRBAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T23:30:01.796721Z","bundle_sha256":"3841e3a72a0cd3327aa7f53aab88fa5fa5005681c2788f2a881b01add956fffb"}}