TL;DR
This paper reviews particle physics models of inflation, focusing on single-field scenarios with canonical kinetic terms, and compares their predictions with observational data to understand their viability.
Contribution
It classifies single-field inflation models based on inflaton field variation and discusses their construction within beyond Standard Model physics.
Findings
Small-field models are consistent with current observations.
Large-field models face tighter observational constraints.
The classification aids in understanding the theoretical landscape of inflation models.
Abstract
Inflation 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 physics
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