Planck constraints on Higgs modulated reheating of renormalization group improved inflation

TL;DR

This paper explores how Higgs field dynamics within RG improved inflationary cosmology can produce observable primordial perturbations and non-Gaussianity, linking collider physics with early universe cosmology.

Contribution

It introduces a Higgs modulated reheating mechanism in RG improved inflation, showing its potential to generate primordial perturbations consistent with Planck data.

Findings

Sufficient inflationary e-folds achieved with Higgs dynamics

Primordial non-Gaussianity can be sizable in this model

Model constraints are compatible with Planck CMB data

Abstract

Within the framework of RG improved inflationary cosmology motivated by asymptotically safe gravity, we study the dynamics of a scalar field which can be interpreted as the Higgs field. The background trajectories of this model can provide sufficient inflationary e-folds and a graceful exit to a radiation dominated phase. We study the possibility of generating primordial curvature perturbations through the Standard Model Higgs boson. This can be achieved under finely tuned parameter choices by making use of the modulated reheating mechanism. The primordial non-gaussianity is expected to be sizable in this model. Though tightly constrained by the newly released Planck CMB data, this model provides a potentially interesting connection between collider and early universe physics.