TeV-scale unification of light dark matter and neutrino mass
Cheng-Wei Chiang, Shu-Yu Ho, Van Que Tran

TL;DR
This paper proposes a TeV-scale model linking neutrino mass generation with dark matter properties, predicting observable signals at future neutrino detectors.
Contribution
It introduces a unified framework where TeV-scale heavy neutral leptons generate neutrino masses and dark matter, connecting cosmology with collider and neutrino experiments.
Findings
TeV-scale heavy neutral leptons can produce the correct dark matter relic abundance.
The model predicts sub-GeV dark matter with specific decay properties.
Observable neutrino signals are expected at JUNO, Hyper-Kamiokande, and DUNE.
Abstract
We demonstrate that TeV-scale heavy neutral leptons (HNLs) responsible for inverse-seesaw neutrino mass generation can simultaneously fix the cosmological abundance and decay properties of dark matter (DM). The spontaneous breaking of lepton number gives rise to a pseudo-Nambu-Goldstone boson that serves as a light DM candidate, whose mass originates from a small explicit symmetry-breaking term. The same HNLs that generate neutrino masses produce the DM via freeze-in and mediate its decay into neutrinos, leading to a tight correlation among neutrino masses, DM relic abundance, and DM lifetime. For collider-accessible TeV-scale HNLs, the observed relic density and lifetime constraints point to sub-GeV DM, yielding observable neutrino signals at JUNO and next-generation detectors such as Hyper-Kamiokande and DUNE. This framework establishes a predictive and experimentally testable link…
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