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Flavour-symmetric type-II Dirac neutrino seesaw mechanism

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arxiv 1710.06498 v1 pith:VP6VO72E submitted 2017-10-17 hep-ph

Flavour-symmetric type-II Dirac neutrino seesaw mechanism

classification hep-ph
keywords neutrinodiracmassmechanismmodeloscillationseesawtype-ii
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a Standard Model extension with underlying A4 flavour symmetry where small Dirac neutrino masses arise from a Type-II seesaw mechanism. The model predicts the "golden" flavour-dependent bottom-tau mass relation, requires an inverted neutrino mass ordering and non-maximal atmospheric mixing angle. Using the latest neutrino oscillation global fit we derive restrictions on the oscillation parameters, such as a correlation between Dirac CP phase and the lightest neutrino mass.

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  1. Sterile neutrino Dark Matter in the minimal Dirac Seesaw

    hep-ph 2026-03 conditional novelty 5.0

    A minimal Dirac seesaw model yields viable sterile-neutrino dark matter via freeze-in, with the right-handed mixing angle θ_R bypassing X-ray bounds.