Naturally light sterile neutrinos

Abstract

A simple model to accomodate light sterile neutrinos naturally with large mixing with the usual neutrinos has been proposed. The standard model gauge group is extended to include an $SU(2{)}_S$ gauge symmetry. Heavy triplet higgs scalars give small masses to the left-handed neutrinos, while a heavy doublet higgs scalar give mixing with the sterile neutrinos of the same order of magnitude. The neutrino mass matrix thus obtained can explain the solar neutrino deficit, the atmospheric neutrino deficit, the LSND data and hot dark matter. Lepton number is violated here through decays of the heavy triplet higgs, which generates the lepton asymmetry of the universe, which in turn generates a baryon asymmetry of the universe.

11 pages latex file and one postscript figure

References in corpus (7)

• Evidence for oscillation of atmospheric neutrinos
• Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days
• Neutrino Masses and Leptogenesis with Heavy Higgs Triplets
• Study of the atmospheric neutrino flux in the multi-GeV energy range
• R-Symmetry in the Minimal Supersymmetric Standard Model and Beyond with Several Consequences
• KARMEN Limits on nu_e -> nu_tau Oscillations in 2-neutrino and 3-neutrino Mixing Schemes
• Radiative neutrino mass matrix for three active plus one sterile species

Cited by in corpus (7)

• Leptogenesis in left-right symmetric theories
• Neutrino Mixing, CP/T Violation and Textures in Four-Neutrino Models
• KeV right-handed neutrinos from type II seesaw mechanism in a 3-3-1 model
• Triplet Leptogenesis in Left-Right Symmetric Seesaw Models
• Models of Neutrino Masses and Baryogenesis
• See-saw mechanism and four light neutrino state
• Cluster Correlation in Mixed Models