{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"041d7bd7f106e0a4e5e702656a1a36b143ddecca9e339382801e0bd90c95af86","created":"2026-10-03T07:18:02Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"b785f4a58d74452652a2e7e591bcd478e77375e6e6051796b9f596cc68386e03","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"cosmo.inflation.which-inflaton","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Different versions of inflation predict slightly different tilts in the strength of density ripples with size. New data shifted the measured tilt and put the most favored simple model under pressure.","posed_since":"","precise":"Identify the inflaton potential class from ($n_s, r$, running $\\alpha_s$, non-Gaussianity). ACT DR6 combined with Planck and DESI gives $n_s = 0.974 \\pm 0.003$ versus Planck alone $0.965 \\pm 0.004$, which puts Starobinsky $R^2$ inflation at about $2\\sigma$ for $N = 60$ e-folds. An answer is the potential class (plateau, monomial, hilltop, multi-field) singled out at high confidence, with the reheating history it requires.","problem_ref":null,"references":"","settled_by":"Joint measurement of $n_{s}$ to 0.002 and of r or a bound $r < 0.001$, with reheating constraints.","status_note":"The 2025 ACT DR6 shift in $n_s$ prompted modified plateau models with higher-curvature terms or altered reheating.","title":"Which field and potential drove inflation?","topic_ref":"690ffa5b73447ba4221a7c006ebf0c4bb3c77c97b6f540e1aa6bb7a20d15d99b"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b1bde18caa64891dda21b920027c06035ac9844d4bda7522b95bc3f4a70758c3","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"0dae37317a9f054f7f102bbba3f07d4b21e7703943e819c3050a8e57f0dd669e","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"d6XfrrK55KyZ62OaIBPpdiWM-lWddRjP-m7DxJxNqf0xCVxF_KUFBJk8gwC8yFajxlN3d5bbela7vIAGtoxlCg"},"schema":"pubphys.envelope/1"},"record_hash":"b1bde18caa64891dda21b920027c06035ac9844d4bda7522b95bc3f4a70758c3","leaf_index":1264}