2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227948Inflation models are compared with observation on the assumption that the curvature perturbation is generated from the vacuum fluctuation of the inflaton field. The focus is on single-field models with canonical kinetic terms, classified as small- medium- and large-field according to the variation of the inflaton field while cosmological scales leave the horizon. Small-field models are constructed according to the usual paradigm for beyond Standard Model physicsBased on a talk given at the 22nd IAP Colloquium, ``Inflation +25'', Paris, June 2006 Curve omitted from final FigureHigh Energy Physics - TheoryAstrophysicsHigh Energy Physics - Phenomenologytext