{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:GEZV4KT7EI37Q2TFESSUSSAW4L","short_pith_number":"pith:GEZV4KT7","canonical_record":{"source":{"id":"1602.04016","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-12T11:22:22Z","cross_cats_sorted":["hep-ex","hep-lat","hep-ph","nucl-ex"],"title_canon_sha256":"a485d11dae351b4dd77cf01deaf2f0c6db460c05f68fff80a90d62d3ac12159b","abstract_canon_sha256":"5cd90931f32f65f81aed91cdbddcef1a85d6a827287e4c43c5a900a0a8f49b57"},"schema_version":"1.0"},"canonical_sha256":"31335e2a7f2237f86a6524a5494816e2ce7bc29daabd79f79961e8b90685c0d6","source":{"kind":"arxiv","id":"1602.04016","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04016","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04016v1","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04016","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"pith_short_12","alias_value":"GEZV4KT7EI37","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GEZV4KT7EI37Q2TF","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GEZV4KT7","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:GEZV4KT7EI37Q2TFESSUSSAW4L","target":"record","payload":{"canonical_record":{"source":{"id":"1602.04016","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-12T11:22:22Z","cross_cats_sorted":["hep-ex","hep-lat","hep-ph","nucl-ex"],"title_canon_sha256":"a485d11dae351b4dd77cf01deaf2f0c6db460c05f68fff80a90d62d3ac12159b","abstract_canon_sha256":"5cd90931f32f65f81aed91cdbddcef1a85d6a827287e4c43c5a900a0a8f49b57"},"schema_version":"1.0"},"canonical_sha256":"31335e2a7f2237f86a6524a5494816e2ce7bc29daabd79f79961e8b90685c0d6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:04.698464Z","signature_b64":"lJcwWInQMfB9v2PHc8ibBXs2Xnftn+uH8tXVO6/ObeyfA4V4OBAbdDH9xLLgUKQ6PxIdr8mn6Tc15LDNrePAAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31335e2a7f2237f86a6524a5494816e2ce7bc29daabd79f79961e8b90685c0d6","last_reissued_at":"2026-05-18T01:12:04.697982Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:04.697982Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.04016","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":"2026-05-18T01:12:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rNDH2x/suK6sMckg1UaJvR0RvEhUR7F/hwcve/WkEyOqNtfvUNh2ANv+d24iv+QzdbFqVaMCgrubdeVF3L61Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T06:49:48.663013Z"},"content_sha256":"ebfca4a78f3445077d6cdaf846b4df50d992bc16cb2bccef0f3047651f1573e0","schema_version":"1.0","event_id":"sha256:ebfca4a78f3445077d6cdaf846b4df50d992bc16cb2bccef0f3047651f1573e0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:GEZV4KT7EI37Q2TFESSUSSAW4L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The pion: an enigma within the Standard Model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","hep-ph","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Craig D. Roberts, Tanja Horn","submitted_at":"2016-02-12T11:22:22Z","abstract_excerpt":"Almost 50 years after the discovery of gluons & quarks, we are only just beginning to understand how QCD builds the basic bricks for nuclei: neutrons, protons, and the pions that bind them. QCD is characterised by two emergent phenomena: confinement & dynamical chiral symmetry breaking (DCSB). They are expressed with great force in the character of the pion. In turn, pion properties suggest that confinement & DCSB are closely connected. As both a Nambu-Goldstone boson and a quark-antiquark bound-state, the pion is unique in Nature. Developing an understanding of its properties is thus critical"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04016","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":""},"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":"2026-05-18T01:12:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2GjtRwwT274bCAgNjbuznLvWAeL3rO8SAPEcojVe/0zb0HualxJ2sEAHliFBUXSKBDxB2tvbAS7d4jfEfO4ZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T06:49:48.663760Z"},"content_sha256":"d88369f0c5d3694b35f2eef2832f1d32b6e1d969221c5457cc01498d81b6c2ec","schema_version":"1.0","event_id":"sha256:d88369f0c5d3694b35f2eef2832f1d32b6e1d969221c5457cc01498d81b6c2ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/bundle.json","state_url":"https://pith.science/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/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":"2026-06-10T06:49:48Z","links":{"resolver":"https://pith.science/pith/GEZV4KT7EI37Q2TFESSUSSAW4L","bundle":"https://pith.science/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/bundle.json","state":"https://pith.science/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GEZV4KT7EI37Q2TFESSUSSAW4L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GEZV4KT7EI37Q2TFESSUSSAW4L","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":"5cd90931f32f65f81aed91cdbddcef1a85d6a827287e4c43c5a900a0a8f49b57","cross_cats_sorted":["hep-ex","hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-12T11:22:22Z","title_canon_sha256":"a485d11dae351b4dd77cf01deaf2f0c6db460c05f68fff80a90d62d3ac12159b"},"schema_version":"1.0","source":{"id":"1602.04016","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04016","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04016v1","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04016","created_at":"2026-05-18T01:12:04Z"},{"alias_kind":"pith_short_12","alias_value":"GEZV4KT7EI37","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GEZV4KT7EI37Q2TF","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GEZV4KT7","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:d88369f0c5d3694b35f2eef2832f1d32b6e1d969221c5457cc01498d81b6c2ec","target":"graph","created_at":"2026-05-18T01:12:04Z","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":"Almost 50 years after the discovery of gluons & quarks, we are only just beginning to understand how QCD builds the basic bricks for nuclei: neutrons, protons, and the pions that bind them. QCD is characterised by two emergent phenomena: confinement & dynamical chiral symmetry breaking (DCSB). They are expressed with great force in the character of the pion. In turn, pion properties suggest that confinement & DCSB are closely connected. As both a Nambu-Goldstone boson and a quark-antiquark bound-state, the pion is unique in Nature. Developing an understanding of its properties is thus critical","authors_text":"Craig D. Roberts, Tanja Horn","cross_cats":["hep-ex","hep-lat","hep-ph","nucl-ex"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-12T11:22:22Z","title":"The pion: an enigma within the Standard Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04016","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:ebfca4a78f3445077d6cdaf846b4df50d992bc16cb2bccef0f3047651f1573e0","target":"record","created_at":"2026-05-18T01:12:04Z","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":"5cd90931f32f65f81aed91cdbddcef1a85d6a827287e4c43c5a900a0a8f49b57","cross_cats_sorted":["hep-ex","hep-lat","hep-ph","nucl-ex"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2016-02-12T11:22:22Z","title_canon_sha256":"a485d11dae351b4dd77cf01deaf2f0c6db460c05f68fff80a90d62d3ac12159b"},"schema_version":"1.0","source":{"id":"1602.04016","kind":"arxiv","version":1}},"canonical_sha256":"31335e2a7f2237f86a6524a5494816e2ce7bc29daabd79f79961e8b90685c0d6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31335e2a7f2237f86a6524a5494816e2ce7bc29daabd79f79961e8b90685c0d6","first_computed_at":"2026-05-18T01:12:04.697982Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:04.697982Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lJcwWInQMfB9v2PHc8ibBXs2Xnftn+uH8tXVO6/ObeyfA4V4OBAbdDH9xLLgUKQ6PxIdr8mn6Tc15LDNrePAAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:04.698464Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.04016","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ebfca4a78f3445077d6cdaf846b4df50d992bc16cb2bccef0f3047651f1573e0","sha256:d88369f0c5d3694b35f2eef2832f1d32b6e1d969221c5457cc01498d81b6c2ec"],"state_sha256":"c4a8a39213cc2e0734df2c05ab3b8dfc1f349f905b9f583d48d8166f7da5d1ca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HDrVXzlb5KhsweyF5mhW2S+t1CVtRr7V0LZMPeMFLrG66R7EQeQrzpr3rt1OqJQHJlPWcYOqfy4LvCIJmGlgBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T06:49:48.667027Z","bundle_sha256":"90b7bd228e8a851a6e8c74841f68126e5e43796cb5d807b56d729c44c6c05a51"}}