{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:VVZB7XD5CH4WLREK2HSEP6Q6GN","short_pith_number":"pith:VVZB7XD5","canonical_record":{"source":{"id":"2407.07944","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2024-07-10T18:00:02Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"1afb8cd2b9280aecd4ccecd837d4d88a108b8c30a5081a20ee079aa4b4a1ee4d","abstract_canon_sha256":"9b8a0b1f43b15abbeb5d0ad38e440cc5f54c6dba12ae06db10bdee384275643c"},"schema_version":"1.0"},"canonical_sha256":"ad721fdc7d11f965c48ad1e447fa1e3378b92efd2ed33050c6dec2756e9e39ff","source":{"kind":"arxiv","id":"2407.07944","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.07944","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"arxiv_version","alias_value":"2407.07944v3","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.07944","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_12","alias_value":"VVZB7XD5CH4W","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_16","alias_value":"VVZB7XD5CH4WLREK","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_8","alias_value":"VVZB7XD5","created_at":"2026-07-05T10:36:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:VVZB7XD5CH4WLREK2HSEP6Q6GN","target":"record","payload":{"canonical_record":{"source":{"id":"2407.07944","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2024-07-10T18:00:02Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"1afb8cd2b9280aecd4ccecd837d4d88a108b8c30a5081a20ee079aa4b4a1ee4d","abstract_canon_sha256":"9b8a0b1f43b15abbeb5d0ad38e440cc5f54c6dba12ae06db10bdee384275643c"},"schema_version":"1.0"},"canonical_sha256":"ad721fdc7d11f965c48ad1e447fa1e3378b92efd2ed33050c6dec2756e9e39ff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:36:26.398432Z","signature_b64":"qNk+8yXnXrU/EVpGMAy6Jmn0E+4jk9WpMBovhiKD0gmx7+B3i4xyK8eVNNg2K1N42W4wmY6+fBJRbcOrCzSACQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad721fdc7d11f965c48ad1e447fa1e3378b92efd2ed33050c6dec2756e9e39ff","last_reissued_at":"2026-07-05T10:36:26.397519Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:36:26.397519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.07944","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:36:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"omy64WT9oqDb3rh3BqTVZAJMEcdV4EFvid/lJd5Y18Bg5aBrvqxcJudLrWHwdSOYcxZsDMh5ZBGB0CJ59bICDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T21:56:30.990671Z"},"content_sha256":"e9b0162dde4d87bb54290272f35e1598fbdde6e26a17fedcf45e2413d2d62246","schema_version":"1.0","event_id":"sha256:e9b0162dde4d87bb54290272f35e1598fbdde6e26a17fedcf45e2413d2d62246"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:VVZB7XD5CH4WLREK2HSEP6Q6GN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Stress Test of Global PDF Fits: Closure Testing the MSHT PDFs and a First Direct Comparison to the Neural Net Approach","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"L. A. Harland-Lang, R.S. Thorne, T. Cridge","submitted_at":"2024-07-10T18:00:02Z","abstract_excerpt":"We present a first global closure test of the fixed parameterisation (MSHT) approach to PDF fitting. We find that the default MSHT20 parameterisation can reproduce the features of the input set in such a closure test to well within the textbook uncertainties. This provides strong evidence that parameterisation inflexibility in the MSHT20 fit is not a significant issue in the data region. We also present the first completely like--for--like comparison between two global PDF fits, namely MSHT and NNPDF, where the only difference is guaranteed to be due to the fitting methodology. To achieve this"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.07944","kind":"arxiv","version":3},"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/2407.07944/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":"2026-07-05T10:36:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xk4bjq2frTf6ZmV1ds79NdVsMwZQReMoRFJdCFp+jnSquPlScK2IzeAbVty82sa1BXpAhe7gi9us0lI/tI/fAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T21:56:30.991033Z"},"content_sha256":"084f50845afb76779786d57fbcca39dfc5c6e1b673763b21dc7066de214a563e","schema_version":"1.0","event_id":"sha256:084f50845afb76779786d57fbcca39dfc5c6e1b673763b21dc7066de214a563e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/bundle.json","state_url":"https://pith.science/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/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":"2026-08-19T21:56:30Z","links":{"resolver":"https://pith.science/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN","bundle":"https://pith.science/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/bundle.json","state":"https://pith.science/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VVZB7XD5CH4WLREK2HSEP6Q6GN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:VVZB7XD5CH4WLREK2HSEP6Q6GN","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":"9b8a0b1f43b15abbeb5d0ad38e440cc5f54c6dba12ae06db10bdee384275643c","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2024-07-10T18:00:02Z","title_canon_sha256":"1afb8cd2b9280aecd4ccecd837d4d88a108b8c30a5081a20ee079aa4b4a1ee4d"},"schema_version":"1.0","source":{"id":"2407.07944","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.07944","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"arxiv_version","alias_value":"2407.07944v3","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.07944","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_12","alias_value":"VVZB7XD5CH4W","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_16","alias_value":"VVZB7XD5CH4WLREK","created_at":"2026-07-05T10:36:26Z"},{"alias_kind":"pith_short_8","alias_value":"VVZB7XD5","created_at":"2026-07-05T10:36:26Z"}],"graph_snapshots":[{"event_id":"sha256:084f50845afb76779786d57fbcca39dfc5c6e1b673763b21dc7066de214a563e","target":"graph","created_at":"2026-07-05T10:36:26Z","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/2407.07944/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a first global closure test of the fixed parameterisation (MSHT) approach to PDF fitting. We find that the default MSHT20 parameterisation can reproduce the features of the input set in such a closure test to well within the textbook uncertainties. This provides strong evidence that parameterisation inflexibility in the MSHT20 fit is not a significant issue in the data region. We also present the first completely like--for--like comparison between two global PDF fits, namely MSHT and NNPDF, where the only difference is guaranteed to be due to the fitting methodology. To achieve this","authors_text":"L. A. Harland-Lang, R.S. Thorne, T. Cridge","cross_cats":["hep-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2024-07-10T18:00:02Z","title":"A Stress Test of Global PDF Fits: Closure Testing the MSHT PDFs and a First Direct Comparison to the Neural Net Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.07944","kind":"arxiv","version":3},"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:e9b0162dde4d87bb54290272f35e1598fbdde6e26a17fedcf45e2413d2d62246","target":"record","created_at":"2026-07-05T10:36:26Z","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":"9b8a0b1f43b15abbeb5d0ad38e440cc5f54c6dba12ae06db10bdee384275643c","cross_cats_sorted":["hep-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2024-07-10T18:00:02Z","title_canon_sha256":"1afb8cd2b9280aecd4ccecd837d4d88a108b8c30a5081a20ee079aa4b4a1ee4d"},"schema_version":"1.0","source":{"id":"2407.07944","kind":"arxiv","version":3}},"canonical_sha256":"ad721fdc7d11f965c48ad1e447fa1e3378b92efd2ed33050c6dec2756e9e39ff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad721fdc7d11f965c48ad1e447fa1e3378b92efd2ed33050c6dec2756e9e39ff","first_computed_at":"2026-07-05T10:36:26.397519Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:36:26.397519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qNk+8yXnXrU/EVpGMAy6Jmn0E+4jk9WpMBovhiKD0gmx7+B3i4xyK8eVNNg2K1N42W4wmY6+fBJRbcOrCzSACQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:36:26.398432Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.07944","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9b0162dde4d87bb54290272f35e1598fbdde6e26a17fedcf45e2413d2d62246","sha256:084f50845afb76779786d57fbcca39dfc5c6e1b673763b21dc7066de214a563e"],"state_sha256":"295b581c7b31f9ef5f4899809d6a4867bfde49460450ff701ce4b95b9ab06ecf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hTX6onfu6d3PnXeC/QvLxapIGlPXhSwDWZfPdAk9rxK07mBE6SUW2ywt/O8hU4ozlEqdWL55bZTBh5OuDzrvBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T21:56:30.994205Z","bundle_sha256":"4bee83cd582f9a6f13be1b13804a70d1c792e24ae9b1a6c31c5885349abb13ae"}}