{"paper":{"title":"Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Non-canonical chaotic inflation models remain viable for potential indices 1/3, 2/3 and 1 when the parameter α is constrained by recent data.","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Chen-Hao Wu, Wei Yang, Ya-Peng Hu","submitted_at":"2026-05-16T02:49:42Z","abstract_excerpt":"In this study, we precisely evaluated the feasibility of the chaotic inflation model within a non-canonical kinetic framework. By applying the slow-roll approximation and imposing constraints on the equilateral non-Gaussianity $f_{\\rm NL}^{\\rm equil}$, we imposed constraints on the feasible range of the potential index $n$. We established physical bounds for the non-canonical parameter $\\alpha$. To obtain precise parameter constraints, we solved the primordial perturbation equations numerically and conducted a rigorous MCMC analysis by using a comprehensive joint P-ACT-LB-BK18 dataset. For the"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"For these potentials n=1/3, 2/3, and 1, our results respectively tightly limit α to the levels of 8.8^{+1.6}_{-2.8}, 11.7^{+1.7}_{-2.6}, and 16.4^{+3.7}_{-7.0}, within the corresponding 1σ confidence intervals. Meanwhile, the required number of e-foldings naturally converges to N ≃ 54, without the need for fine-tuning.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The slow-roll approximation remains valid and the equilateral non-Gaussianity bound f_NL^equil correctly restricts the potential index n before the MCMC stage.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"MCMC fitting of joint P-ACT-LB-BK18 dataset constrains non-canonical parameter alpha to 8.8, 11.7, and 16.4 (1 sigma) for chaotic inflation potentials with n=1/3, 2/3, 1 respectively.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Non-canonical chaotic inflation models remain viable for potential indices 1/3, 2/3 and 1 when the parameter α is constrained by recent data.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"f8066405905b34a940e591d046dbd03ac12b38b43e635a4bdf32889c843de3d0"},"source":{"id":"2605.16772","kind":"arxiv","version":1},"verdict":{"id":"fe94ce36-6495-4257-a3fc-68ff973ae2df","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T21:22:22.821786Z","strongest_claim":"For these potentials n=1/3, 2/3, and 1, our results respectively tightly limit α to the levels of 8.8^{+1.6}_{-2.8}, 11.7^{+1.7}_{-2.6}, and 16.4^{+3.7}_{-7.0}, within the corresponding 1σ confidence intervals. Meanwhile, the required number of e-foldings naturally converges to N ≃ 54, without the need for fine-tuning.","one_line_summary":"MCMC fitting of joint P-ACT-LB-BK18 dataset constrains non-canonical parameter alpha to 8.8, 11.7, and 16.4 (1 sigma) for chaotic inflation potentials with n=1/3, 2/3, 1 respectively.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The slow-roll approximation remains valid and the equilateral non-Gaussianity bound f_NL^equil correctly restricts the potential index n before the MCMC stage.","pith_extraction_headline":"Non-canonical chaotic inflation models remain viable for potential indices 1/3, 2/3 and 1 when the parameter α is constrained by recent data."},"integrity":{"clean":false,"summary":{"advisory":1,"critical":1,"by_detector":{"doi_compliance":{"total":2,"advisory":1,"critical":1,"informational":0}},"informational":0},"endpoint":"/pith/2605.16772/integrity.json","findings":[{"note":"Identifier '10.1016/0370-2693(82' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.","detector":"doi_compliance","severity":"critical","ref_index":1,"audited_at":"2026-05-19T21:31:13.889531Z","detected_doi":"10.1016/0370-2693(82","finding_type":"unresolvable_identifier","verdict_class":"cross_source","detected_arxiv_id":null},{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1051/0004-6361/201935891.7) was visible in the surrounding text but could not be confirmed against doi.org as printed.","detector":"doi_compliance","severity":"advisory","ref_index":3,"audited_at":"2026-05-19T21:31:13.889531Z","detected_doi":"10.1051/0004-6361/201935891.7","finding_type":"recoverable_identifier","verdict_class":"incontrovertible","detected_arxiv_id":null}],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T21:31:19.350817Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T21:31:13.889531Z","status":"completed","version":"1.0.0","findings_count":2},{"name":"claim_evidence","ran_at":"2026-05-19T19:01:56.309585Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T18:33:26.443786Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"b729528b643a290b3f1297c679512bd7ac8969ce0a1d19ca284458735167b552"},"references":{"count":52,"sample":[{"doi":"10.1016/0370-2693(82","year":1982,"title":"A. 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