{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:KUSPMY45WAW4KVP57X2WY5PBKG","short_pith_number":"pith:KUSPMY45","canonical_record":{"source":{"id":"hep-lat/9701012","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-lat","submitted_at":"1997-01-26T20:32:56Z","cross_cats_sorted":["hep-ph","hep-th"],"title_canon_sha256":"ee3e8fbaabf173b593e780d9fab6c2076ec01db8c5385a93dfd6ebdf8ba4f6ec","abstract_canon_sha256":"289c4982443d4a5cb96989f2c81343f7cf01af72f10c9d3ef1eb4b223591af0a"},"schema_version":"1.0"},"canonical_sha256":"5524f6639db02dc555fdfdf56c75e1519613e6ea71006229968395ef094d67ee","source":{"kind":"arxiv","id":"hep-lat/9701012","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-lat/9701012","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"arxiv_version","alias_value":"hep-lat/9701012v2","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-lat/9701012","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_12","alias_value":"KUSPMY45WAW4","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_16","alias_value":"KUSPMY45WAW4KVP5","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_8","alias_value":"KUSPMY45","created_at":"2026-07-04T16:04:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:KUSPMY45WAW4KVP57X2WY5PBKG","target":"record","payload":{"canonical_record":{"source":{"id":"hep-lat/9701012","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-lat","submitted_at":"1997-01-26T20:32:56Z","cross_cats_sorted":["hep-ph","hep-th"],"title_canon_sha256":"ee3e8fbaabf173b593e780d9fab6c2076ec01db8c5385a93dfd6ebdf8ba4f6ec","abstract_canon_sha256":"289c4982443d4a5cb96989f2c81343f7cf01af72f10c9d3ef1eb4b223591af0a"},"schema_version":"1.0"},"canonical_sha256":"5524f6639db02dc555fdfdf56c75e1519613e6ea71006229968395ef094d67ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:04:43.376347Z","signature_b64":"3JiPuAsf+kXYTJZYYyGAIaUJ406AC6wbwtylcorIHDZ+sMrYXJIT0wYyog05lZk/uImZBOUs2YgKythK3JlBCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5524f6639db02dc555fdfdf56c75e1519613e6ea71006229968395ef094d67ee","last_reissued_at":"2026-07-04T16:04:43.375950Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:04:43.375950Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-lat/9701012","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":"2026-07-04T16:04:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EsCST/fdKzR7EQ537vFaNScH5xZEDT2EPxtMbkNtYWQbOtZta7ziXMqSX1joo3zc1OS1Ui4uFi9bG3X4CTY2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:48:06.139676Z"},"content_sha256":"ea35cd686e6949076d721dfced72f878b56d99193f7489ead77187fea565e705","schema_version":"1.0","event_id":"sha256:ea35cd686e6949076d721dfced72f878b56d99193f7489ead77187fea565e705"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:KUSPMY45WAW4KVP57X2WY5PBKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Topology of the SU(2) vacuum: a lattice study using improved cooling","license":"","headline":"","cross_cats":["hep-ph","hep-th"],"primary_cat":"hep-lat","authors_text":"Ion-Olimpiu Stamatescu, Margarita Garcia Perez, Philippe de Forcrand","submitted_at":"1997-01-26T20:32:56Z","abstract_excerpt":"We study the topological structure of the SU(2) vacuum at zero temperature: topological susceptibility, size, shape and distance distributions of the instantons. We use a cooling algorithm based on an improved action with scale invariant instanton solutions. This algorithm needs no monitoring or calibration, has an inherent cut off for dislocations and leaves unchanged instantons at physical scales. The physical relevance of our results is checked by studying the scaling and finite volume dependence. We obtain a susceptibility of (200(15) MeV)^4. The instanton size distribution is peaked aroun"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-lat/9701012","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/hep-lat/9701012/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":"2026-07-04T16:04:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1gJoJ25WOq/Fr6XJzuaAFOXKQUZbD55BNy/bBqSIOhg3DqYDL10LjsHmI87y2jrgAC3SuoeM0sDN3uF7rzpfCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T20:48:06.140179Z"},"content_sha256":"59f67fd4cbf61542970c991b6b6f95ca1a4769b4a2e16b8e8250c19ac48c7596","schema_version":"1.0","event_id":"sha256:59f67fd4cbf61542970c991b6b6f95ca1a4769b4a2e16b8e8250c19ac48c7596"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KUSPMY45WAW4KVP57X2WY5PBKG/bundle.json","state_url":"https://pith.science/pith/KUSPMY45WAW4KVP57X2WY5PBKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KUSPMY45WAW4KVP57X2WY5PBKG/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":"2026-08-03T20:48:06Z","links":{"resolver":"https://pith.science/pith/KUSPMY45WAW4KVP57X2WY5PBKG","bundle":"https://pith.science/pith/KUSPMY45WAW4KVP57X2WY5PBKG/bundle.json","state":"https://pith.science/pith/KUSPMY45WAW4KVP57X2WY5PBKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KUSPMY45WAW4KVP57X2WY5PBKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:KUSPMY45WAW4KVP57X2WY5PBKG","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":"289c4982443d4a5cb96989f2c81343f7cf01af72f10c9d3ef1eb4b223591af0a","cross_cats_sorted":["hep-ph","hep-th"],"license":"","primary_cat":"hep-lat","submitted_at":"1997-01-26T20:32:56Z","title_canon_sha256":"ee3e8fbaabf173b593e780d9fab6c2076ec01db8c5385a93dfd6ebdf8ba4f6ec"},"schema_version":"1.0","source":{"id":"hep-lat/9701012","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-lat/9701012","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"arxiv_version","alias_value":"hep-lat/9701012v2","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-lat/9701012","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_12","alias_value":"KUSPMY45WAW4","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_16","alias_value":"KUSPMY45WAW4KVP5","created_at":"2026-07-04T16:04:43Z"},{"alias_kind":"pith_short_8","alias_value":"KUSPMY45","created_at":"2026-07-04T16:04:43Z"}],"graph_snapshots":[{"event_id":"sha256:59f67fd4cbf61542970c991b6b6f95ca1a4769b4a2e16b8e8250c19ac48c7596","target":"graph","created_at":"2026-07-04T16:04:43Z","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/hep-lat/9701012/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the topological structure of the SU(2) vacuum at zero temperature: topological susceptibility, size, shape and distance distributions of the instantons. We use a cooling algorithm based on an improved action with scale invariant instanton solutions. This algorithm needs no monitoring or calibration, has an inherent cut off for dislocations and leaves unchanged instantons at physical scales. The physical relevance of our results is checked by studying the scaling and finite volume dependence. We obtain a susceptibility of (200(15) MeV)^4. The instanton size distribution is peaked aroun","authors_text":"Ion-Olimpiu Stamatescu, Margarita Garcia Perez, Philippe de Forcrand","cross_cats":["hep-ph","hep-th"],"headline":"","license":"","primary_cat":"hep-lat","submitted_at":"1997-01-26T20:32:56Z","title":"Topology of the SU(2) vacuum: a lattice study using improved cooling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-lat/9701012","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:ea35cd686e6949076d721dfced72f878b56d99193f7489ead77187fea565e705","target":"record","created_at":"2026-07-04T16:04:43Z","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":"289c4982443d4a5cb96989f2c81343f7cf01af72f10c9d3ef1eb4b223591af0a","cross_cats_sorted":["hep-ph","hep-th"],"license":"","primary_cat":"hep-lat","submitted_at":"1997-01-26T20:32:56Z","title_canon_sha256":"ee3e8fbaabf173b593e780d9fab6c2076ec01db8c5385a93dfd6ebdf8ba4f6ec"},"schema_version":"1.0","source":{"id":"hep-lat/9701012","kind":"arxiv","version":2}},"canonical_sha256":"5524f6639db02dc555fdfdf56c75e1519613e6ea71006229968395ef094d67ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5524f6639db02dc555fdfdf56c75e1519613e6ea71006229968395ef094d67ee","first_computed_at":"2026-07-04T16:04:43.375950Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:04:43.375950Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3JiPuAsf+kXYTJZYYyGAIaUJ406AC6wbwtylcorIHDZ+sMrYXJIT0wYyog05lZk/uImZBOUs2YgKythK3JlBCw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:04:43.376347Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-lat/9701012","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea35cd686e6949076d721dfced72f878b56d99193f7489ead77187fea565e705","sha256:59f67fd4cbf61542970c991b6b6f95ca1a4769b4a2e16b8e8250c19ac48c7596"],"state_sha256":"160a6bc6f7fd4cd0940a2b8c2e70fc8cf732909e2fc3aead3761762f4af7f8c1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hgso6NgAEuMmNMpNDZEJthaiXOD5URcSVW0oYP2KmB0weWKUJozI5ShD8rwuZNrr72OnEhjeBY4lggHphRReAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T20:48:06.145410Z","bundle_sha256":"46558cfb8b183c116230fb6ea9998e94f2c171ec9b30272e46ace873af3f9f82"}}