{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:ARZE63HEXNVMOWUVFTVJP6QD5N","short_pith_number":"pith:ARZE63HE","canonical_record":{"source":{"id":"0708.1631","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2007-08-12T22:23:33Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"146cd9c77404f769e51f5a485a129d534460ffe216b82cb1d47df68012380567","abstract_canon_sha256":"38a20a3d977a1cac4cb9b4c6325f8d7479168eb4ae72a169f49dd8e6971b767a"},"schema_version":"1.0"},"canonical_sha256":"04724f6ce4bb6ac75a952cea97fa03eb68894de203d958f166bd13598f12b994","source":{"kind":"arxiv","id":"0708.1631","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.1631","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"arxiv_version","alias_value":"0708.1631v1","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.1631","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_12","alias_value":"ARZE63HEXNVM","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_16","alias_value":"ARZE63HEXNVMOWUV","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_8","alias_value":"ARZE63HE","created_at":"2026-07-04T15:24:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:ARZE63HEXNVMOWUVFTVJP6QD5N","target":"record","payload":{"canonical_record":{"source":{"id":"0708.1631","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2007-08-12T22:23:33Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"146cd9c77404f769e51f5a485a129d534460ffe216b82cb1d47df68012380567","abstract_canon_sha256":"38a20a3d977a1cac4cb9b4c6325f8d7479168eb4ae72a169f49dd8e6971b767a"},"schema_version":"1.0"},"canonical_sha256":"04724f6ce4bb6ac75a952cea97fa03eb68894de203d958f166bd13598f12b994","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:24:34.334370Z","signature_b64":"kZLY9nn1uyRcb/owGloh1lMuCru61Dhozsm0x4eVZvjfoW/E8VzfxcDhNOoP+lTSiZH16un9Hp1A/3sDR7TIBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"04724f6ce4bb6ac75a952cea97fa03eb68894de203d958f166bd13598f12b994","last_reissued_at":"2026-07-04T15:24:34.333968Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:24:34.333968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0708.1631","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":"2026-07-04T15:24:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f+tEHYkJxzt3wtPykxLlrgl0pPyZ9d8RgIXbUibvuJYIeKWycI1nUXuvZgTstZFex9oBm0a15lzpZi/2qxOyBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:36:36.699881Z"},"content_sha256":"1f0f514d27fa277ad160850d9fd0072694e3127e4bed58051b76032f5d116ee2","schema_version":"1.0","event_id":"sha256:1f0f514d27fa277ad160850d9fd0072694e3127e4bed58051b76032f5d116ee2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:ARZE63HEXNVMOWUVFTVJP6QD5N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Leading Order Calculation of Shear Viscosity in Hot Quantum Electrodynamics from Diagrammatic Methods","license":"","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"J.-S. Gagnon, S. Jeon","submitted_at":"2007-08-12T22:23:33Z","abstract_excerpt":"We compute the shear viscosity at leading order in hot Quantum Electrodynamics. Starting from the Kubo relation for shear viscosity, we use diagrammatic methods to write down the appropriate integral equations for bosonic and fermionic effective vertices. We also show how Ward identities can be used to put constraints on these integral equations. One of our main results is an equation relating the kernels of the integral equations with functional derivatives of the full self-energy; it is similar to what is obtained with two-particle-irreducible effective action methods. However, since we use "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.1631","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/0708.1631/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":"2026-07-04T15:24:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qf6oG80HRS7ciRKYG8vBNCejer5+1gakqrGkONuJatwalNtxRSX2DOhlvJkqHGEIhmQrGYyx+xBDx+pfwKNLBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:36:36.700779Z"},"content_sha256":"6dc5f6a7537528cf69bf599f9cbd54691175cbf8005e76a9acee48fb68c47628","schema_version":"1.0","event_id":"sha256:6dc5f6a7537528cf69bf599f9cbd54691175cbf8005e76a9acee48fb68c47628"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/bundle.json","state_url":"https://pith.science/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/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":"2026-08-06T16:36:36Z","links":{"resolver":"https://pith.science/pith/ARZE63HEXNVMOWUVFTVJP6QD5N","bundle":"https://pith.science/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/bundle.json","state":"https://pith.science/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ARZE63HEXNVMOWUVFTVJP6QD5N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:ARZE63HEXNVMOWUVFTVJP6QD5N","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":"38a20a3d977a1cac4cb9b4c6325f8d7479168eb4ae72a169f49dd8e6971b767a","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"2007-08-12T22:23:33Z","title_canon_sha256":"146cd9c77404f769e51f5a485a129d534460ffe216b82cb1d47df68012380567"},"schema_version":"1.0","source":{"id":"0708.1631","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0708.1631","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"arxiv_version","alias_value":"0708.1631v1","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0708.1631","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_12","alias_value":"ARZE63HEXNVM","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_16","alias_value":"ARZE63HEXNVMOWUV","created_at":"2026-07-04T15:24:34Z"},{"alias_kind":"pith_short_8","alias_value":"ARZE63HE","created_at":"2026-07-04T15:24:34Z"}],"graph_snapshots":[{"event_id":"sha256:6dc5f6a7537528cf69bf599f9cbd54691175cbf8005e76a9acee48fb68c47628","target":"graph","created_at":"2026-07-04T15:24:34Z","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/0708.1631/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We compute the shear viscosity at leading order in hot Quantum Electrodynamics. Starting from the Kubo relation for shear viscosity, we use diagrammatic methods to write down the appropriate integral equations for bosonic and fermionic effective vertices. We also show how Ward identities can be used to put constraints on these integral equations. One of our main results is an equation relating the kernels of the integral equations with functional derivatives of the full self-energy; it is similar to what is obtained with two-particle-irreducible effective action methods. However, since we use ","authors_text":"J.-S. Gagnon, S. Jeon","cross_cats":["nucl-th"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2007-08-12T22:23:33Z","title":"Leading Order Calculation of Shear Viscosity in Hot Quantum Electrodynamics from Diagrammatic Methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.1631","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":"sha256:1f0f514d27fa277ad160850d9fd0072694e3127e4bed58051b76032f5d116ee2","target":"record","created_at":"2026-07-04T15:24:34Z","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":"38a20a3d977a1cac4cb9b4c6325f8d7479168eb4ae72a169f49dd8e6971b767a","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"2007-08-12T22:23:33Z","title_canon_sha256":"146cd9c77404f769e51f5a485a129d534460ffe216b82cb1d47df68012380567"},"schema_version":"1.0","source":{"id":"0708.1631","kind":"arxiv","version":1}},"canonical_sha256":"04724f6ce4bb6ac75a952cea97fa03eb68894de203d958f166bd13598f12b994","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"04724f6ce4bb6ac75a952cea97fa03eb68894de203d958f166bd13598f12b994","first_computed_at":"2026-07-04T15:24:34.333968Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:24:34.333968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kZLY9nn1uyRcb/owGloh1lMuCru61Dhozsm0x4eVZvjfoW/E8VzfxcDhNOoP+lTSiZH16un9Hp1A/3sDR7TIBg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:24:34.334370Z","signed_message":"canonical_sha256_bytes"},"source_id":"0708.1631","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f0f514d27fa277ad160850d9fd0072694e3127e4bed58051b76032f5d116ee2","sha256:6dc5f6a7537528cf69bf599f9cbd54691175cbf8005e76a9acee48fb68c47628"],"state_sha256":"735d4054ba3de38e14bf5e944f6034d89437240fcf24e695fe0785eb0c909f5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5oWnstfuibKVacYoRXjo8L8qztEHjlVBZSGXHClYbJHY4b03eV/e1x3KUmmODtV1eXVYui32qTm7Gac79YyzCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T16:36:36.705330Z","bundle_sha256":"1da64877781b6dd83dfdbd4e191c2539d163ace8e5ad838359fefd0a00a83f25"}}