{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"549d505e19d7e3b6bb429399840b1da1ddc88b9358128f13a165b272dae4a782","created":"2026-10-03T07:18:09Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"9811ec7e3b128b1ef30c3a573fad6c0f269df542e73fd113fcc3996a6ebb98db","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"qft.generalized-symmetries.sm-noninvertible","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Some symmetries of the Standard Model, thought to be destroyed by quantum effects, survive in a form with no undo. Which measurable predictions follow from them is unclear.","posed_since":"2022","precise":"The ABJ-anomalous axial U(1) symmetries of QED and of the Standard Model retain non-invertible rational-angle subgroups (Choi, Lam, Shao 2022; Cordova, Ohmori 2022). Determine the exact selection rules and constraints on observables (neutral pion decay, axion couplings, neutrino masses) that follow from them beyond ordinary anomaly matching.","problem_ref":null,"references":"","settled_by":"A derivation of an exact constraint on a measurable quantity that follows from the non-invertible symmetry and not from ordinary anomaly matching.","status_note":"","title":"Observable consequences of non-invertible symmetries in the Standard Model","topic_ref":"5eb0476a75858c5dd523d1082965cb71e335c77a7a5cf121927138b7c11c6ef2"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"3a03f9362b4aa406f488a1ed4f47a152561a22de9fb7b66c295b6bbe4eb35e38","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"abc64c39f7ba159dfb1e876399f8742a4c637a200fa7a310ddd4c4f50bb3898b","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"_OUvmKkVh7QmDRpoI8Da1IgypW8wPyca-JR37bQxeLFkHyZ22JaRafq0keSXB9q5kRdtn92wDOIGHtaIzXNZDA"},"schema":"pubphys.envelope/1"},"record_hash":"3a03f9362b4aa406f488a1ed4f47a152561a22de9fb7b66c295b6bbe4eb35e38","leaf_index":1912}