{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:B6X4CUUS4ZCNVHZCP6ERUSKSSZ","short_pith_number":"pith:B6X4CUUS","canonical_record":{"source":{"id":"hep-ph/9907456","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1999-07-22T13:58:09Z","cross_cats_sorted":["cond-mat","hep-th"],"title_canon_sha256":"694c790ed3cdc6e0d1f3d50006281c6acda043e77d851c92d861c894592872a5","abstract_canon_sha256":"4ae1a8d788ac4cc1c93efcd5474ae51020deb211876fd4a62d38df759af24825"},"schema_version":"1.0"},"canonical_sha256":"0fafc15292e644da9f227f891a49529641ee50c238ba249b838355e356aa5195","source":{"kind":"arxiv","id":"hep-ph/9907456","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9907456","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9907456v4","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9907456","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"pith_short_12","alias_value":"B6X4CUUS4ZCN","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"B6X4CUUS4ZCNVHZC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"B6X4CUUS","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:B6X4CUUS4ZCNVHZCP6ERUSKSSZ","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/9907456","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1999-07-22T13:58:09Z","cross_cats_sorted":["cond-mat","hep-th"],"title_canon_sha256":"694c790ed3cdc6e0d1f3d50006281c6acda043e77d851c92d861c894592872a5","abstract_canon_sha256":"4ae1a8d788ac4cc1c93efcd5474ae51020deb211876fd4a62d38df759af24825"},"schema_version":"1.0"},"canonical_sha256":"0fafc15292e644da9f227f891a49529641ee50c238ba249b838355e356aa5195","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:55.050303Z","signature_b64":"xQURAzmklGL0Yc6xoB3euWdili7fqtMntzfEYcmKqWiiDCkUhSRoQhMQ7pGg79DUFH0q0t6VqrfnaVakwtVdCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fafc15292e644da9f227f891a49529641ee50c238ba249b838355e356aa5195","last_reissued_at":"2026-05-18T04:23:55.049893Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:55.049893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/9907456","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d5tFfj0LhG6rtaJq4ikNqhScN+tKrTfXllE9wyBPG0NAcAB4HnTACJQlBsZmXCcE8A1py6n0+YneraSYoUpsDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:26:31.962037Z"},"content_sha256":"cd89ca18f864b31b7bbd694e54809afb6bdb8466f8a7f062537949836a4f590a","schema_version":"1.0","event_id":"sha256:cd89ca18f864b31b7bbd694e54809afb6bdb8466f8a7f062537949836a4f590a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:B6X4CUUS4ZCNVHZCP6ERUSKSSZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Momentum-Space Topology of Standard Model","license":"","headline":"","cross_cats":["cond-mat","hep-th"],"primary_cat":"hep-ph","authors_text":"G.E. Volovik","submitted_at":"1999-07-22T13:58:09Z","abstract_excerpt":"The momentum-space topological invariants, which characterize the ground state of the Standard Model, are continuous functions of two parameters, generated by the hypercharge and by the weak charge. These invariants provide the absence of the mass of the elementary fermionic particles in the symmetric phase above the electroweak transition (the mass protection). All the invariants become zero in the broken symmetry phase, as a result all the elementary fermions become massive. Relation of the momentum-space invariants to chiral anomaly is also discussed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9907456","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T04:23:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YMtaGHVmen6D2soyIVDzhcmPQpNDdHgvmFX6o52DL0fHbsXI7mPUhrZ4PKI7kecoaMLZzQ51moTw9cpktWDbAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T05:26:31.962760Z"},"content_sha256":"1c356144dbd31c91824b44b1922d2b09bafa853c6a7d140a561b61992cd520ec","schema_version":"1.0","event_id":"sha256:1c356144dbd31c91824b44b1922d2b09bafa853c6a7d140a561b61992cd520ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/bundle.json","state_url":"https://pith.science/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/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":"2026-06-11T05:26:31Z","links":{"resolver":"https://pith.science/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ","bundle":"https://pith.science/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/bundle.json","state":"https://pith.science/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B6X4CUUS4ZCNVHZCP6ERUSKSSZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:B6X4CUUS4ZCNVHZCP6ERUSKSSZ","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":"4ae1a8d788ac4cc1c93efcd5474ae51020deb211876fd4a62d38df759af24825","cross_cats_sorted":["cond-mat","hep-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1999-07-22T13:58:09Z","title_canon_sha256":"694c790ed3cdc6e0d1f3d50006281c6acda043e77d851c92d861c894592872a5"},"schema_version":"1.0","source":{"id":"hep-ph/9907456","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9907456","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9907456v4","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9907456","created_at":"2026-05-18T04:23:55Z"},{"alias_kind":"pith_short_12","alias_value":"B6X4CUUS4ZCN","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"B6X4CUUS4ZCNVHZC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"B6X4CUUS","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:1c356144dbd31c91824b44b1922d2b09bafa853c6a7d140a561b61992cd520ec","target":"graph","created_at":"2026-05-18T04:23:55Z","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"},"paper":{"abstract_excerpt":"The momentum-space topological invariants, which characterize the ground state of the Standard Model, are continuous functions of two parameters, generated by the hypercharge and by the weak charge. These invariants provide the absence of the mass of the elementary fermionic particles in the symmetric phase above the electroweak transition (the mass protection). All the invariants become zero in the broken symmetry phase, as a result all the elementary fermions become massive. Relation of the momentum-space invariants to chiral anomaly is also discussed.","authors_text":"G.E. Volovik","cross_cats":["cond-mat","hep-th"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1999-07-22T13:58:09Z","title":"Momentum-Space Topology of Standard Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9907456","kind":"arxiv","version":4},"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:cd89ca18f864b31b7bbd694e54809afb6bdb8466f8a7f062537949836a4f590a","target":"record","created_at":"2026-05-18T04:23:55Z","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":"4ae1a8d788ac4cc1c93efcd5474ae51020deb211876fd4a62d38df759af24825","cross_cats_sorted":["cond-mat","hep-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1999-07-22T13:58:09Z","title_canon_sha256":"694c790ed3cdc6e0d1f3d50006281c6acda043e77d851c92d861c894592872a5"},"schema_version":"1.0","source":{"id":"hep-ph/9907456","kind":"arxiv","version":4}},"canonical_sha256":"0fafc15292e644da9f227f891a49529641ee50c238ba249b838355e356aa5195","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0fafc15292e644da9f227f891a49529641ee50c238ba249b838355e356aa5195","first_computed_at":"2026-05-18T04:23:55.049893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:55.049893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xQURAzmklGL0Yc6xoB3euWdili7fqtMntzfEYcmKqWiiDCkUhSRoQhMQ7pGg79DUFH0q0t6VqrfnaVakwtVdCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:55.050303Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9907456","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd89ca18f864b31b7bbd694e54809afb6bdb8466f8a7f062537949836a4f590a","sha256:1c356144dbd31c91824b44b1922d2b09bafa853c6a7d140a561b61992cd520ec"],"state_sha256":"b0d85ab9219cb2b685a41416cacf318f4ac724c8fa8e87468e52c1008d74448c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dhCgU7oyWp/8r/A1trIaBkVdK7E6c3iX41k1zo7Gew6Hj+OACY1y6090iLJsGJI6QjCdE1r17rqRIxeOehJIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T05:26:31.967134Z","bundle_sha256":"db5c3420fb988f2cd266f27262d7df0373fa05a10cc02834c0428fc9ecb7edc6"}}