Non-Gaussianities from the Standard Model Higgs

TL;DR

This paper investigates how the Standard Model Higgs could generate cosmological perturbations during inflation, focusing on the non-Gaussian features caused by its potential's non-linearities, and discusses implications for future observations.

Contribution

It provides a detailed analysis of non-Gaussianities from the Higgs field during inflation, linking particle physics parameters to cosmological signatures.

Findings

Non-Gaussianity levels depend on the Higgs potential's non-linearities.

Future detection of non-Gaussianity could rule out tensor mode detection by PLANCK.

Current top mass values influence the predicted non-Gaussian signals.

Abstract

We have recently proposed that the Standard Model Higgs might be responsible for generating the cosmological perturbations of the universe by acting as an isocurvature mode during a de Sitter inflationary stage. In this paper we study the level of non-Gaussianity in the cosmological perturbations which are inevitably generated due to the non-linearities of the Standard Model Higgs potential. In particular, for the current central value of the top mass, we find that a future detection of non-Gaussianity would exclude the detection of tensor modes by the PLANCK satellite.