3-Neutrino Mass Spectrum from Combining Seesaw and Radiative Neutrino Mass Mechanisms

Abstract

We extend the Standard Model by adding a second Higgs doublet and a right-handed neutrino singlet with a heavy Majorana mass term. In this model, there are one heavy and three light Majorana neutrinos with a mass hierarchy m_3 >> m_2 >> m_1 such that that only m_3 is non-zero at the tree level and light because of the seesaw mechanism, m_2 is generated at the one-loop and m_1 at the two-loop level. We show that the atmospheric neutrino oscillations and large mixing MSW solar neutrino transitions with $\Delta m_{\mathrm{atm}}^2\simeq m_3^2$ and $\Delta m_{\mathrm{solar}}^2\simeq m_2^2$, respectively, are naturally accommodated in this model without employing any symmetry.

9 pages, Revtex, no figures; misprints corrected

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• Neutrino Mass Anarchy
• Status of the MSW Solutions to the Solar Neutrino Problem
• Constraints from Neutrino Oscillation Experiments on the Effective Majorana Mass in Neutrinoless Double $\beta$-Decay
• Type II Seesaw and a Gauge Model for the Bimaximal Mixing Explanation of Neutrino Puzzles
• A Supersymmetric Solution to the Solar and Atmospheric Neutrino Problems
• Neutrino Anomalies in an Extended Zee Model
• Permutation Symmetry for Neutrino and Charged-Lepton Mass Matrices

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• The Interplay between Neutrinos and Charged Leptons in the Minimal SU(3)_LxU(1)_N Gauge Model
• Understanding neutrino properties from decoupling right-handed neutrinos and extra Higgs doublets
• Neutrino masses from Planck-scale lepton number breaking
• Radiative Generation of Quark Masses and Mixing Angles in the Two Higgs Doublet Model
• Radiative Neutrino Mass in Type III Seesaw Model
• Radiative neutrino masses from order-4 CP symmetry
• Neutrino masses from new generations
• Lepton parameters in the see-saw model extended by one extra Higgs doublet
• Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors
• Non-zero θ_13 in models for hierarchical neutrino mass spectrum
• Can SUSY relax LNV constraints coming from loop corrections to light neutrino masses on the low-scale Seesaw?