Conformal Standard Model and Inflation

TL;DR

This paper proposes an inflation model based on the Conformal Standard Model with non-minimal gravitational couplings, involving additional scalars and neutrinos, which aligns with current cosmological observations.

Contribution

It introduces a novel inflation scenario within the Conformal Standard Model framework, utilizing non-minimal couplings of Higgs and sterile scalars to explain early universe inflation.

Findings

Tensor-to-scalar ratio matches current data

Spectral index aligns with observations

Model accommodates a wide parameter range

Abstract

This article presents a possible inflation scenario as a consequence of non-minimal gravitational couplings in the Conformal Standard Model. The model consists, in comparison to the SM, of additional right-chiral neutrinos and complex scalars coupled to the right-chiral neutrinos but not to the SM particles. The inflation is driven by two non-minimally coupled fields one being the usual Higgs and the other one of the sterile scalars. It turns out that in this model the tensor to scalar ratio and spectral index can match the current data for a wide range of parameters.