Extended Scotogenic Model of Neutrino Mass and Proton Decay

TL;DR

This paper extends the scotogenic model linking dark matter, neutrino mass, and proton decay, successfully correlating small neutrino masses with long proton lifetime while satisfying cosmological and collider constraints.

Contribution

It introduces an extended scotogenic framework connecting dark matter, neutrino mass, and proton stability, with detailed analysis of constraints and parameter space.

Findings

Successful correlation between neutrino mass and proton lifetime.

Dark matter candidate in the 100 GeV to 10 TeV range satisfies constraints.

Identified parameter space for model couplings.

Abstract

The current article presents an extension of the classical scotogenic neutrino mass paradigm, where the three issues in particle physics: dark matter, smallness of neutrino mass, and stability of the proton are interconnected. The scenario encompasses the neutrino mass as well as the proton decay as a consequence of an existence of the dark matter. The study successfully achieves the correlation between the naturally small neutrino masses and naturally long proton lifetime in the present paradigm. Furthermore, all relevant cosmological, collider, and flavor physics constraints are incorporated in the detailed analysis. The scotogenic fermionic dark matter with the mass in the range from $100$ GeV to $10$ TeV successfully satisfies all relevant constraints. The valid range of $2.51\times 10^{-5} < \lambda < 2\times 10^{-3}$ is obtained for the 2HDM $\lambda$ coupling. We give a brief discussion, as well as, outline some of the future prospects.