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arXiv · 1607.03931

Two-loop Dirac neutrino mass and WIMP dark matter

Cesar Bonilla·Ernest Ma·Eduardo Peinado·Jose W. F. Valle
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Abstract

We propose a "scotogenic" mechanism relating small neutrino mass and cosmological dark matter. Neutrinos are Dirac fermions with masses arising only in two--loop order through the sector responsible for dark matter. Two triality symmetries ensure both dark matter stability and strict lepton number conservation at higher orders. A global spontaneously broken U(1) symmetry leads to a physical $Diracon$ that induces invisible Higgs decays which add up to the Higgs to dark matter mode. This enhances sensitivities to spin-independent WIMP dark matter search below $m_h/2$.

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Cesar Bonilla, Ernest Ma, Eduardo Peinado, Jose W. F. Valle. 2016-09-20. Two-loop Dirac neutrino mass and WIMP dark matter. https://doi.org/10.1016/j.physletb.2016.09.027

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