Scalaron the healer: removing the strong-coupling in the Higgs- and Higgs-dilaton inflations

TL;DR

This paper demonstrates that adding an $R^2$ term to Higgs-based inflation models resolves strong-coupling issues, elevating the energy scales to the Planck level across scalar, gauge, and gravity sectors.

Contribution

It introduces an $R^2$ term to Higgs inflation models, making them consistent by raising strong-coupling scales to the Planck energy.

Findings

Strong coupling scales are lifted to the Planck scale

Higgs-inflation and Higgs-dilaton models become consistent

Unified treatment of scalar, gauge, and gravity sectors

Abstract

We show that introducing $R^2$-term makes the Higgs-inflation and Higgs-dilaton inflation consistent models: the strong coupling energy scales in scalar, gauge and gravity sectors all are lifted up to the Planck scale.