Higgs Vacuum Stability and Modified Chaotic Inflation

TL;DR

This paper explores how a scalar field interacting with the Higgs and inflaton can stabilize the electroweak vacuum up to the Planck scale and modify chaotic inflation predictions to align with Planck 2015 observations.

Contribution

It introduces a scalar field that modifies chaotic inflation and stabilizes the electroweak vacuum through threshold effects on the Higgs quartic coupling.

Findings

Electroweak vacuum stability up to the Planck scale achieved.

Inflation predictions adjusted to match Planck 2015 data.

Scalar-Higgs-inflaton interactions provide viable new physics scenarios.

Abstract

The issue of electroweak vacuum stability is studied in presence of a scalar field which participates in modifying the minimal chaotic inflation model. It is shown that the threshold effect on the Higgs quartic coupling originating from the Higgs-inflaton sector interaction can essentially make the electroweak vacuum stable upto the Planck scale. On the other hand we observe that the new physics parameters in this combined framework are enough to provide deviation from the minimal chaotic inflation predictions so as to keep it consistent with recent observation by Planck 2015.