Observational consequences of the Standard Model Higgs inflation variants

TL;DR

This paper investigates how different variants of Standard Model Higgs inflation can be distinguished observationally through their unique signatures in cosmic microwave background data and Higgs mass measurements.

Contribution

It provides a unified analysis of multiple Higgs inflation models using quantum-level dynamics and MCMC constraints, highlighting their distinguishable observational signatures.

Findings

Distinct consistency relations for each model

Potential to differentiate models with LHC and PLANCK data

Constraints on inflationary parameters from combined datasets

Abstract

We consider the possibility to observationally differentiate the Standard Model (SM) Higgs driven inflation with non-minimal couplingto gravity from other variants of SM Higgs inflation based on the scalar field theories with non-canonical kinetic term such as Galileon-like kinetic term and kinetic term with non-minimal derivative coupling to the Einstein tensor. In order to ensure consistent results, we study the SM Higgs inflation variants by using the same method, computing the full dynamics of the background and perturbations of the Higgs field during inflation at quantum level. Assuming that all the SM Higgs inflation variants are consistent theories, we use the MCMC technique to derive constraints on the inflationnoary parameters and the Higgs boson mass from their fit to WMAP7+SN+BAO data set. We conclude that a combination of a Higgs mass measurement by the LHC and accurate determination by the PLANCK satellite of the spectral index of curvature perturbations and tensor-to-scalar ratio will enable to distinguish among these models. We also show that the consistency relations of the SM Higgs inflation variants are distinct enough to differentiate the models.