Standard Model criticality and Higgs inflation

TL;DR

This paper explores how the Higgs potential's flatness at high scales influences different inflation scenarios, considering the top quark mass and implications from string theory.

Contribution

It revisits Higgs inflation models accounting for Standard Model validity up to high scales and discusses implications from non-supersymmetric string theory.

Findings

Different inflation types depend on the top quark mass.

Higgs potential flatness impacts inflation scenarios.

Implications from string theory are considered.

Abstract

It is known that the Higgs potential becomes flat around the Planck scale under the assumption that the Standard Model is valid up to very high scale. Taking this into account, we revisit the Higgs inflation scenario and find that the various types of inflation occur depending on the value of the top mass. We also discuss the implication from non-supersymmetric string theory.