Sterile Neutrinos and Global Symmetries

Abstract

We use an effective-field-theory approach to construct models with naturally light sterile neutrinos, due to either exact or accidental global symmetries. The most attractive models we find are based on gauge symmetries, either discrete or continuous. We give examples of simple models based on Z_N, U(1)', and SU(2)'.

8 pages. v2 (as in PRD): minor changes, typos corrected, two refs added

Cited by in corpus (8)

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• Gauge Trimming of Neutrino Masses
• Anomaly-free Abelian gauge symmetries with Dirac scotogenic models
• Active-sterile neutrino mixing in the absence of bare active neutrino mass
• Anomaly-free chiral $U(1{)}_D$ and its scotogenic implication
• Tree level Majorana neutrino mass from Type-1 $\times$ Type-2 Seesaw mechanism with Dark Matter
• Chiral dark matter and radiative neutrino masses from gauged U(1) symmetry
• Invisible Z decay width bounds on active-sterile neutrino mixing in the (3+1) and (3+2) models