{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:5JIZUKKQMGGA23PIJV2U2NMOJB","short_pith_number":"pith:5JIZUKKQ","canonical_record":{"source":{"id":"2010.15704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-10-29T15:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"70604a37eab5ec0aa9e73c1f3d812879be2874f97e0ca46d62f38981d2fdd383","abstract_canon_sha256":"02d57b0ad9c2552c93b63eae1a1104fafe5a3542dd751f849e9ca5f06d895e98"},"schema_version":"1.0"},"canonical_sha256":"ea519a2950618c0d6de84d754d358e485d2a637c49bd8f4516033cda2db521ab","source":{"kind":"arxiv","id":"2010.15704","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15704","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15704v1","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15704","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_12","alias_value":"5JIZUKKQMGGA","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_16","alias_value":"5JIZUKKQMGGA23PI","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_8","alias_value":"5JIZUKKQ","created_at":"2026-07-05T01:47:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:5JIZUKKQMGGA23PIJV2U2NMOJB","target":"record","payload":{"canonical_record":{"source":{"id":"2010.15704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-10-29T15:47:58Z","cross_cats_sorted":[],"title_canon_sha256":"70604a37eab5ec0aa9e73c1f3d812879be2874f97e0ca46d62f38981d2fdd383","abstract_canon_sha256":"02d57b0ad9c2552c93b63eae1a1104fafe5a3542dd751f849e9ca5f06d895e98"},"schema_version":"1.0"},"canonical_sha256":"ea519a2950618c0d6de84d754d358e485d2a637c49bd8f4516033cda2db521ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:47:39.870119Z","signature_b64":"SmLMn4E+xVIc0NEYMIE5o8Ki0rKxNTd7JpKrJ6FTNJQnybuuMt864B0+us+/3lkg5gA54kkKCJ9B7CvVQjD5Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea519a2950618c0d6de84d754d358e485d2a637c49bd8f4516033cda2db521ab","last_reissued_at":"2026-07-05T01:47:39.869690Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:47:39.869690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.15704","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":"2026-07-05T01:47:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AKdLb+uySOTtcvNtSjvt+vEJjgaeQmKK3wJoMBZDWf85bDgND1D1+J6KAVc8orYSkt4ppKkuWUbZ2Jjh6xUYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:28:44.534519Z"},"content_sha256":"db84f615c66faadac1273f996732666391347d6f7e98fe34b0d41c1c8f8d34bd","schema_version":"1.0","event_id":"sha256:db84f615c66faadac1273f996732666391347d6f7e98fe34b0d41c1c8f8d34bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:5JIZUKKQMGGA23PIJV2U2NMOJB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shear viscosity in QCD and why it's hard to calculate","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Guy D. Moore","submitted_at":"2020-10-29T15:47:58Z","abstract_excerpt":"Shear viscosity is a dynamical property of fluid systems close to equilibrium, describing resistance to sheared flow. After reviewing the physics of viscosity and the reason it is usually difficult to compute, I discuss its importance within the theory of QCD and the obstacles to carrying out such a computation. A diagrammatic analysis requires extensive resummations and even then convergence is poor at physically relevant couplings. Lattice approaches require a poorly controlled analytical continuation of data from the Euclidean to the Minkowski domain. At present our best results for QCD she"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15704","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2010.15704/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":"2026-07-05T01:47:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0PmmcMKEBCjjjtnsyCSSHSVugnGDy+7moBULE62AG/HTL82Yi8DkR8VUI1d6QfN5jgrssbpFVy80GsuUiqvvBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T18:28:44.535159Z"},"content_sha256":"268262556564df84d1cea51e5f70ddee2b5cd7b0c74f1b57aea59483de35a20b","schema_version":"1.0","event_id":"sha256:268262556564df84d1cea51e5f70ddee2b5cd7b0c74f1b57aea59483de35a20b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/bundle.json","state_url":"https://pith.science/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/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":"2026-08-17T18:28:44Z","links":{"resolver":"https://pith.science/pith/5JIZUKKQMGGA23PIJV2U2NMOJB","bundle":"https://pith.science/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/bundle.json","state":"https://pith.science/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5JIZUKKQMGGA23PIJV2U2NMOJB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:5JIZUKKQMGGA23PIJV2U2NMOJB","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":"02d57b0ad9c2552c93b63eae1a1104fafe5a3542dd751f849e9ca5f06d895e98","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-10-29T15:47:58Z","title_canon_sha256":"70604a37eab5ec0aa9e73c1f3d812879be2874f97e0ca46d62f38981d2fdd383"},"schema_version":"1.0","source":{"id":"2010.15704","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.15704","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"arxiv_version","alias_value":"2010.15704v1","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.15704","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_12","alias_value":"5JIZUKKQMGGA","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_16","alias_value":"5JIZUKKQMGGA23PI","created_at":"2026-07-05T01:47:39Z"},{"alias_kind":"pith_short_8","alias_value":"5JIZUKKQ","created_at":"2026-07-05T01:47:39Z"}],"graph_snapshots":[{"event_id":"sha256:268262556564df84d1cea51e5f70ddee2b5cd7b0c74f1b57aea59483de35a20b","target":"graph","created_at":"2026-07-05T01:47:39Z","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/2010.15704/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Shear viscosity is a dynamical property of fluid systems close to equilibrium, describing resistance to sheared flow. After reviewing the physics of viscosity and the reason it is usually difficult to compute, I discuss its importance within the theory of QCD and the obstacles to carrying out such a computation. A diagrammatic analysis requires extensive resummations and even then convergence is poor at physically relevant couplings. Lattice approaches require a poorly controlled analytical continuation of data from the Euclidean to the Minkowski domain. At present our best results for QCD she","authors_text":"Guy D. Moore","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-10-29T15:47:58Z","title":"Shear viscosity in QCD and why it's hard to calculate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.15704","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:db84f615c66faadac1273f996732666391347d6f7e98fe34b0d41c1c8f8d34bd","target":"record","created_at":"2026-07-05T01:47:39Z","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":"02d57b0ad9c2552c93b63eae1a1104fafe5a3542dd751f849e9ca5f06d895e98","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2020-10-29T15:47:58Z","title_canon_sha256":"70604a37eab5ec0aa9e73c1f3d812879be2874f97e0ca46d62f38981d2fdd383"},"schema_version":"1.0","source":{"id":"2010.15704","kind":"arxiv","version":1}},"canonical_sha256":"ea519a2950618c0d6de84d754d358e485d2a637c49bd8f4516033cda2db521ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea519a2950618c0d6de84d754d358e485d2a637c49bd8f4516033cda2db521ab","first_computed_at":"2026-07-05T01:47:39.869690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:47:39.869690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SmLMn4E+xVIc0NEYMIE5o8Ki0rKxNTd7JpKrJ6FTNJQnybuuMt864B0+us+/3lkg5gA54kkKCJ9B7CvVQjD5Cw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:47:39.870119Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.15704","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db84f615c66faadac1273f996732666391347d6f7e98fe34b0d41c1c8f8d34bd","sha256:268262556564df84d1cea51e5f70ddee2b5cd7b0c74f1b57aea59483de35a20b"],"state_sha256":"2904acb0814111f7b56a0351e9602c5c155dfb909695191505c7017f0b4e3136"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SXZbx/OE1CnSwCtIcZ6QNodUyXNBxo5QwGeTmwT78aPGknjPYZsmKkxCN5hTLkF5EHkpdSDspdfCqrZhfrd9DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T18:28:44.540480Z","bundle_sha256":"5cf9b3c35fa3a993aa744c2001fbdfc8c19eba417e2bd7e912f1625fb074140f"}}