Pseudo-Dirac Neutrinos in the New Standard Model

Abstract

The addition of gauge singlet fermions to the Standard Model Lagrangian renders the neutrinos massive and allows one to explain all that is experimentally known about neutrino masses and lepton mixing by varying the values of the Majorana mass parameters M for the gauge singlets and the neutrino Yukawa couplings. Here we explore the region of parameter space where M values are much smaller than the neutrino Dirac masses. In this region, neutrinos are pseudo-Dirac fermions. We find that current solar data constrain M values to be less than at least 1E-9 eV, and discuss the sensitivity of future experiments to tiny gauge singlet fermion masses. We also discuss a useful basis for analyzing pseudo-Dirac neutrino mixing effects. In particular, we identify a simple relationship between elements of M and the induced enlarged mixing matrix and new mass-squared differences. These allow one to directly relate bounds on the new mass-squared differences to bounds on the singlet fermion Majorana masses.

20 Pages, 9 .eps figures, Updated references

References in corpus (53)

• Leptogenesis
• Neutrino masses and mixings in non-factorizable geometry
• The $\nu$MSM, Dark Matter and Neutrino Masses
• The Search for Heavy Majorana Neutrinos
• Precision Measurement of Neutrino Oscillation Parameters with KamLAND
• Phenomenology with Massive Neutrinos
• New solar opacities, abundances, helioseismology, and neutrino fluxes
• Electron Energy Spectra, Fluxes, and Day-Night Asymmetries of ${}^8$B Solar Neutrinos from the 391-Day Salt Phase SNO Data Set
• Theory of Neutrinos: A White Paper
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Solar neutrino measurements in Super-Kamiokande-II
• Complete results for five years of GNO solar neutrino observations
• Light Neutrinos without Heavy Mass Scales: A Higher-Dimensional Seesaw Mechanism
• New results on solar neutrino fluxes from 192 days of Borexino data
• How to find neutral leptons of the nuMSM?
• Independent Measurement of the Total Active 8B Solar Neutrino Flux Using an Array of 3He Proportional Counters at the Sudbury Neutrino Observatory
• 10,000 Standard Solar Models: a Monte Carlo Simulation
• Signatures for Majorana neutrinos at hadron colliders
• Solar neutrinos as probes of neutrino-matter interactions
• A Survey of Lepton Number Violation Via Effective Operators
• Probing Lepton Number Violation via Majorana Neutrinos at Hadron Supercolliders
• Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
• Pseudo-Dirac Neutrinos, a Challenge for Neutrino Telescopes
• Measurement of the ${\nu }_e$ and Total ${}^8$B Solar Neutrino Fluxes with the Sudbury Neutrino Observatory Phase I Data Set
• See-Saw Energy Scale and the LSND Anomaly
• Signature for heavy Majorana neutrinos in hadronic collisions
• Neutrino Phenomenology of Very Low-Energy Seesaws
• Solar mass-varying neutrino oscillations
• Homestake result, sterile neutrinos and low energy solar neutrino experiments
• Phenomenological implications of neutrinos in extra dimensions
• Signal of heavy Majorana neutrinos at hadron colliders
• Mass Varying Neutrinos in the Sun
• Neutrino physics overview
• Effects of sterile neutrinos on the ultrahigh-energy cosmic neutrino flux
• Pseudo-Dirac Scenario for Neutrino Oscillations
• Gauge Trimming of Neutrino Masses
• Sterile neutrinos: direct mixing effects versus induced mass matrix of active neutrinos
• Neutrino Masses and Lepton Flavour Violation in Thick Brane Scenarios
• On the Evolution of the Neutrino State inside the Sun
• Upper bound on the scale of Majorana-neutrino mass generation
• Seasonal Variations of the 7Be Solar Neutrino Flux
• Neutrinos Have Mass - So What?
• A new mechanism for a naturally small Dirac neutrino mass
• Effects of Environment Dependence of Neutrino Mass versus Solar and Reactor Neutrino Data
• Sterile Neutrinos and Global Symmetries
• Pseudo-Dirac neutrinos as a potential complete solution to the neutrino oscillation puzzle
• Earth Matter Effect in 7Be Solar Neutrino Experiments
• Phenomenology of Pseudo Dirac Neutrinos
• Piecing the Solar Neutrino Puzzle Together at SNO
• Testing the LMA solution with solar neutrinos independently of solar models
• Revisiting pseudo-Dirac neutrinos
• Large Mixing from Small: Pseudo-Dirac Neutrinos and the Singular Seesaw
• Degenerate Dirac Neutrinos

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