{"paper":{"title":"Axion Quality in Warped Extra-Dimension","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Higher-dimensional gauge invariance in warped extra-dimensional models constrains non-QCD Peccei-Quinn breaking to nonlocal effects along the compact dimension, allowing parametric suppression of unwanted axion potential contributions.","cross_cats":["hep-th"],"primary_cat":"hep-ph","authors_text":"Chang Hyeon Lee, Chang Sub Shin, Kiwoon Choi","submitted_at":"2026-04-09T18:45:33Z","abstract_excerpt":"We investigate the axion quality problem in warped extra-dimensional models in which the QCD axion arises as the Wilson-line mode of a five-dimensional $U(1)$ gauge field compactified on an $S^1/\\mathbb{Z}_2$ orbifold. Higher-dimensional gauge invariance severely constrains possible sources of Peccei--Quinn symmetry breaking, implying that non-QCD contributions to the axion potential are predominantly generated by nonlocal effects mediated by $U(1)$-charged fields propagating along the compact dimension. We systematically compute these contributions and examine how both the warped geometry and"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Higher-dimensional gauge invariance severely constrains possible sources of Peccei--Quinn symmetry breaking, implying that non-QCD contributions to the axion potential are predominantly generated by nonlocal effects mediated by U(1)-charged fields propagating along the compact dimension.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the dominant non-QCD contributions are indeed the nonlocal ones from U(1)-charged fields and that no other unaccounted local or brane-localized breaking sources arise that would spoil the parametric suppression.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Warped extra-dimensional axion models achieve high quality when nonlocal U(1)-charged field effects are sufficiently suppressed by the warp factor and orbifold structure.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Higher-dimensional gauge invariance in warped extra-dimensional models constrains non-QCD Peccei-Quinn breaking to nonlocal effects along the compact dimension, allowing parametric suppression of unwanted axion potential contributions.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1a7d0f4552821f5d7651c0d6ed5e74641f029d9b21a3fb9e7624d695521b5ec3"},"source":{"id":"2604.08700","kind":"arxiv","version":2},"verdict":{"id":"80275a71-d966-43d0-9207-323818daee43","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T16:42:14.825933Z","strongest_claim":"Higher-dimensional gauge invariance severely constrains possible sources of Peccei--Quinn symmetry breaking, implying that non-QCD contributions to the axion potential are predominantly generated by nonlocal effects mediated by U(1)-charged fields propagating along the compact dimension.","one_line_summary":"Warped extra-dimensional axion models achieve high quality when nonlocal U(1)-charged field effects are sufficiently suppressed by the warp factor and orbifold structure.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the dominant non-QCD contributions are indeed the nonlocal ones from U(1)-charged fields and that no other unaccounted local or brane-localized breaking sources arise that would spoil the parametric suppression.","pith_extraction_headline":"Higher-dimensional gauge invariance in warped extra-dimensional models constrains non-QCD Peccei-Quinn breaking to nonlocal effects along the compact dimension, allowing parametric suppression of unwanted axion potential contributions."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.08700/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"}