{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:26QJKQZDAZMNR2IUNNFVT6XFUC","short_pith_number":"pith:26QJKQZD","schema_version":"1.0","canonical_sha256":"d7a09543230658d8e9146b4b59fae5a0a69afe2f61f402732ed5cbe1c7736608","source":{"kind":"arxiv","id":"1411.3325","version":2},"attestation_state":"computed","paper":{"title":"Anomalous solutions to the strong CP problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"hep-ph","authors_text":"Anson Hook","submitted_at":"2014-11-12T21:00:03Z","abstract_excerpt":"We present a new mechanism for solving the strong CP problem using a Z2 discrete symmetry and an anomalous U(1) symmetry. A Z2 symmetry is used so that two gauge groups have the same theta angle. An anomalous U(1) symmetry makes the difference between the two theta angles physical and the sum unphysical. Two models are presented where the anomalous symmetry manifests itself in the IR in different ways. In the first model there are massless bifundamental quarks, a solution reminiscent of the massless up quark solution. In the IR of this model, the $\\eta'$ boson relaxes the QCD theta angle to th"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1411.3325","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2014-11-12T21:00:03Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"7f1b928818b086dc4d89a5034f6c56066146cef43127247457490e191bd5d4fc","abstract_canon_sha256":"e4b0148bc9f660231bbd87e81abeb7f32b79353f2c6d1747807b3744ed2347bd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:49.165993Z","signature_b64":"OBWCLCfRhzlr3EHufxWt/DjBtZkq+AjPyJdRex1+/JJjcHbHcLw4WdaCae4lccsy028CWV9Z8IaswzAGayqECg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7a09543230658d8e9146b4b59fae5a0a69afe2f61f402732ed5cbe1c7736608","last_reissued_at":"2026-05-18T02:18:49.165255Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:49.165255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Anomalous solutions to the strong CP problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"hep-ph","authors_text":"Anson Hook","submitted_at":"2014-11-12T21:00:03Z","abstract_excerpt":"We present a new mechanism for solving the strong CP problem using a Z2 discrete symmetry and an anomalous U(1) symmetry. A Z2 symmetry is used so that two gauge groups have the same theta angle. An anomalous U(1) symmetry makes the difference between the two theta angles physical and the sum unphysical. Two models are presented where the anomalous symmetry manifests itself in the IR in different ways. In the first model there are massless bifundamental quarks, a solution reminiscent of the massless up quark solution. In the IR of this model, the $\\eta'$ boson relaxes the QCD theta angle to th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3325","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1411.3325","created_at":"2026-05-18T02:18:49.165376+00:00"},{"alias_kind":"arxiv_version","alias_value":"1411.3325v2","created_at":"2026-05-18T02:18:49.165376+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.3325","created_at":"2026-05-18T02:18:49.165376+00:00"},{"alias_kind":"pith_short_12","alias_value":"26QJKQZDAZMN","created_at":"2026-05-18T12:28:09.283467+00:00"},{"alias_kind":"pith_short_16","alias_value":"26QJKQZDAZMNR2IU","created_at":"2026-05-18T12:28:09.283467+00:00"},{"alias_kind":"pith_short_8","alias_value":"26QJKQZD","created_at":"2026-05-18T12:28:09.283467+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.24849","citing_title":"Accidental Peccei-Quinn Symmetry from Chiral Gauge Symmetry and Mirror QCD","ref_index":37,"is_internal_anchor":false},{"citing_arxiv_id":"2605.06787","citing_title":"The structure of multi-axion solutions to the strong CP problem","ref_index":67,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC","json":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC.json","graph_json":"https://pith.science/api/pith-number/26QJKQZDAZMNR2IUNNFVT6XFUC/graph.json","events_json":"https://pith.science/api/pith-number/26QJKQZDAZMNR2IUNNFVT6XFUC/events.json","paper":"https://pith.science/paper/26QJKQZD"},"agent_actions":{"view_html":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC","download_json":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC.json","view_paper":"https://pith.science/paper/26QJKQZD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1411.3325&json=true","fetch_graph":"https://pith.science/api/pith-number/26QJKQZDAZMNR2IUNNFVT6XFUC/graph.json","fetch_events":"https://pith.science/api/pith-number/26QJKQZDAZMNR2IUNNFVT6XFUC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC/action/storage_attestation","attest_author":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC/action/author_attestation","sign_citation":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC/action/citation_signature","submit_replication":"https://pith.science/pith/26QJKQZDAZMNR2IUNNFVT6XFUC/action/replication_record"}},"created_at":"2026-05-18T02:18:49.165376+00:00","updated_at":"2026-05-18T02:18:49.165376+00:00"}