Gauge Trimming of Neutrino Masses

Abstract

We show that under a new U(1) gauge symmetry, which is non-anomalous in the presence of one ``right-handed neutrino'' per generation and consistent with the standard model Yukawa couplings, the most general fermion charges are determined in terms of four rational parameters. This generalization of the B-L symmetry with generation-dependent lepton charges leads to neutrino masses induced by operators of high dimensionality. Neutrino masses are thus naturally small without invoking physics at energies above the TeV scale, whether neutrinos are Majorana or Dirac fermions. This ``Leptocratic'' Model predicts the existence of light quasi-sterile neutrinos with consequences for cosmology, and implies that collider experiments may reveal the origin of neutrino masses.

16 pages

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Cited by in corpus (15)

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• Cascade Seesaw for Tiny Neutrino Mass
• Composite Dirac Neutrinos
• Chiral Abelian gauge theories with few fermions
• Fermion Mass Hierarchy and Proton Stability from Non-anomalous U(1)_F in SUSY SU(5)
• Hadronic Footprint of GeV-Mass Dark Matter
• Consequences of a Pati-Salam unification of the electroweak-scale active ${\nu }_R$ model
• Neutrino Mass Models: circa 2008
• Flavorful $Z^{\prime }$ signatures at LHC and ILC
• Anomaly-free chiral $U(1{)}_D$ and its scotogenic implication
• Multi-charged TeV scale scalars and fermions in the framework of a radiative seesaw model
• Radiative neutrino masses: A window to new physics