# Common origin of modified chaotic inflation, non thermal dark matter and Dirac neutrino mass

## TL;DR

This paper presents a minimal particle physics extension that unifies cosmic inflation, non-thermal dark matter, and Dirac neutrino masses, consistent with current cosmological data and offering testable predictions.

## Contribution

It introduces a unified model linking modified chaotic inflation, freeze-in dark matter, and tiny Dirac neutrino masses through a common scalar field.

## Key findings

- Inflation compatible with latest cosmology data
- Dark matter remains out of equilibrium, generated via freeze-in
- Tiny Yukawa couplings produce sub-eV Dirac neutrino masses

## Abstract

We propose a minimal extension of the standard model of particle physics to accommodate cosmic inflation, dark matter and light neutrino masses. While the inflationary phase is obtained from a modified chaotic inflation scenario, consistent with latest cosmology data, the dark matter particle is a fermion singlet which remains out of equilibrium in the early universe. The scalar field which revives the chaotic inflation scenario by suitable modification also assists in generating tiny couplings of dark matter with its mother particle, naturally realizing the non-thermal or freeze-in type dark matter scenario. Interestingly, the same assisting scalar field also helps in realizing tiny Yukawa couplings required to generate sub-eV Dirac neutrino mass from neutrino couplings to the standard model like Higgs field. The minimality as well as providing a unified solution to all three problems keep the model predictive at experiments spanning out to all frontiers.