{"paper":{"title":"When CPT Violation Hides in Plain Sight: How CP Measurements Are Compromised and How to Fix Them","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Carlos A. Arg\\\"uelles, Gabriela Barenboim, Ivan Martinez-Soler, Miaochen Jin, Pablo Fern\\'andez-Men\\'endez","submitted_at":"2026-06-18T18:17:08Z","abstract_excerpt":"The extraction of the leptonic charge-parity (CP)-violating phase $\\delta_{\\rm CP}$ from long-baseline neutrino oscillation experiments rests on the assumption of charge-parity-time (CPT) conservation. We show that CPT violation, parametrized as an asymmetry $\\delta\\Delta m^2_{31} \\equiv \\Delta\\bar{m}^2_{31} - \\Delta m^2_{31}$ between neutrino and antineutrino mass splittings, induces an effective, energy-dependent phase shift $\\phi_{\\rm eff}(E)$ that is functionally degenerate with $\\delta_{\\rm CP}$ in the appearance asymmetry $\\langle\\Delta P\\rangle$. This has a profound implication for long"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.20830","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.20830/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"}