Light fermionic dark matter window in the scotogenic inverse seesaw model

TL;DR

This paper identifies a viable light fermionic dark matter mass window in the scotogenic inverse seesaw model that aligns with various experimental constraints and can be tested by upcoming experiments.

Contribution

It uncovers a specific dark matter mass range in the model that satisfies multiple experimental constraints and proposes future tests for this window.

Findings

Identifies a 58-63 GeV dark matter mass window compatible with constraints.

Proposes future experiments to test the dark matter candidate.

Links neutrino mass generation with dark matter phenomenology.

Abstract

The origin of neutrino mass and the nature of dark matter (DM) remain unresolved puzzles in particle physics, and an appealing possibility is to address both in a unified picture. This paper explores a light fermionic DM candidate within the scotogenic inverse seesaw model, which can simultaneously provide a mechanism for neutrino mass generation. By incorporating constraints from neutrino oscillation data, charged lepton flavor violating processes, invisible decays of the Higgs and $Z$ bosons, DM relic density, and direct detection of DM, we uncover a light fermionic DM window in the mass range $58\,{\rm GeV} \lesssim m_{\tt DM} \lesssim 63\,{\rm GeV}$ that can satisfy all of the aforementioned constraints. We find that this window can be jointly tested by next-generation ton-scale DM direct detection experiments including PandaX-xT and XENONnT, Higgs invisible decays, and future lepton colliders such as ILC.