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arXiv · 2512.00854

Quasi-Dirac fermion: A source of neutrino mass and dark matter

Nguyen Thi Nguyet Nga·Nguyen Huy Thao·Phung Van Dong
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Abstract

Neutral vectorlike fermion as inspired by unified theories might become quasi-Dirac states at TeV due to a violation in lepton-like symmetry. It is shown that such quasi-Dirac fermions can properly achieve radiative neutrino mass generation and dark matter stability. Indeed, the small splitting of quasi-Dirac masses, i.e. $ΔM/M\ll 1$, suitably suppresses neutrino mass to be small in order to allow dark matter annihilation and detection to be appropriate to experiment as well as charged lepton flavor violation limit.

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Nguyen Thi Nguyet Nga, Nguyen Huy Thao, Phung Van Dong. 2026-03-13. Quasi-Dirac fermion: A source of neutrino mass and dark matter. https://arxiv.org/abs/2512.00854

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