Inflation in a modified radiative seesaw model

TL;DR

This paper extends a radiative seesaw model with a complex scalar field to incorporate inflation, demonstrating that inflation consistent with CMB data can occur at sub-Planckian field values, linking neutrino mass and dark matter to early Universe inflation.

Contribution

It introduces a complex scalar extension to the radiative seesaw model to explain inflation, neutrino masses, and dark matter within a unified framework.

Findings

Inflation compatible with CMB data achieved at sub-Planckian field values.

The model links neutrino mass generation to inflationary dynamics.

Provides a unified explanation for neutrino masses, dark matter, and early Universe inflation.

Abstract

A radiative seesaw model with an inert doublet dark matter is a promising candidate which could explain the existence of neutrino masses, dark matter and baryon number asymmetry of the Universe, simultaneously. In addition to these issues, inflation should also be explained since the recent CMB observations suggest the existence of the inflationary era at the early stage of the Universe. Thus, we extend it by a complex scalar field with a specific potential. This scaler could also be related to the neutrino mass generation at a TeV scale. We show that the inflation favored by the CMB observations could be realized even if inflaton takes sub-Plankian values during inflation.