Regularization of Single Field Inflation Models

Hoffmann, Joshua and Sloan, David (2023) Regularization of Single Field Inflation Models. Physical Review D - Particles, Fields, Gravitation and Cosmology, 107 (2): 023502. ISSN 1550-7998

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Abstract

There are many single field inflationary models that are consistent with the recent Planck 2018 measurements of the spectral index n s and tensor-to-scalar ratio r . Despite good agreement with observational data some of these models suffer from having unregularized potentials which would produce a collapsing universe shortly after the end of inflation. In this paper we show that how one chooses to correct the behavior potential toward the end of inflation can have a significant effect on the inflationary predictions of the model, specifically in the case of quartic hilltop and radiatively corrected Higgs inflation.