Constraining the (Low-Energy) Type-I Seesaw

Abstract

The type-I seesaw Lagrangian yields a non-generic set of active-sterile oscillation parameters - the neutrino mass eigenvalues and the physical elements of the full mixing matrix are entwined. For this reason one is able to, in principle, test the model by performing enough measurements which are sensitive to neutrino masses and lepton mixing. We point out that for light enough right-handed neutrino masses - less than 10 eV - next-generation short-baseline neutrino oscillation experiments may be able to unambiguously rule out (or "rule in") the low energy seesaw as the Lagrangian that describes neutrino masses. These types of searches are already under consideration in order to address the many anomalies from accelerator neutrino experiments (LSND, MiniBooNe), reactor neutrino experiments (the "reactor anomaly") and others. In order to test the low-energy seesaw, it is crucial to explore different oscillation channels, including nu_e and nu_mu disappearance and nu_mu to nu_tau appearance.

15 pages, five figures

References in corpus (40)

• Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
• Oscillating neutrinos and mu --> e, gamma
• The Reactor Antineutrino Anomaly
• The $\nu$MSM, Dark Matter and Neutrino Masses
• Search for neutrino oscillations on a long base-line at the CHOOZ nuclear power station
• A Search for Electron Neutrino Appearance at the Delta m**2 ~ 1 eV**2 Scale
• Event Excess in the MiniBooNE Search for ${\bar{\nu }}_{\mu }\to {\bar{\nu }}_e$ Oscillations
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Sterile neutrinos: the dark side of the light fermions
• Unexplained Excess of Electron-Like Events From a 1-GeV Neutrino Beam
• Evidence of theta(13)>0 from global neutrino data analysis
• Are there sterile neutrinos at the eV scale?
• Where we are on ${\theta }_{13}$: addendum to "Global neutrino data and recent reactor fluxes: status of three-flavour oscillation parameters"
• Cosmology seeking friendship with sterile neutrinos
• Search for nu(mu)-->nu(e) Oscillations in the NOMAD Experiment
• Neutrinoless Double Beta Decay and Heavy Sterile Neutrinos
• Neutrinoless double beta decay in seesaw models
• Sterile neutrinos with eV masses in cosmology -- how disfavoured exactly?
• Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
• The Elements of the Neutrino Mass Matrix: Allowed Ranges and Implications of Texture Zeros
• 3+1 and 3+2 Sterile Neutrino Fits
• Active to sterile neutrino mixing limits from neutral-current interactions in MINOS
• Final NOMAD results on nu_mu->nu_tau and nu_e->nu_tau oscillations including a new search for nu_tau appearance using hadronic tau decays
• See-Saw Energy Scale and the LSND Anomaly
• Low Energy Signatures of the TeV Scale See-Saw Mechanism
• Dual baseline search for muon neutrino disappearance at 0.5 eV^2 < Δm^2 < 40 eV^2
• Pseudo-Dirac Neutrinos in the New Standard Model
• Neutrino Phenomenology of Very Low-Energy Seesaws
• Implications of 3+1 Short-Baseline Neutrino Oscillations
• Mixing of Active and Sterile Neutrinos
• Implications for New Physics from Fine-Tuning Arguments: I. Application to SUSY and Seesaw Cases
• Resolving the Reactor Neutrino Anomaly with the KATRIN Neutrino Experiment
• Structure of neutrino mass matrix and CP violation
• Neutrino mass matrix: inverted hierarchy and CP violation
• Parametrization of Seesaw Models and Light Sterile Neutrinos
• Minimal models with light sterile neutrinos
• The Physical Range of Majorana Neutrino Mixing Parameters
• Charged Lepton Decays L_i to L_j + gamma, Leptogenesis CP-Violating Parameters and Majorana Phases
• Low-Energy Neutrino Majorana Phases and Charged-Lepton Electric Dipole Moments
• Parameterizing Majorana Neutrino Couplings in the Higgs Sector

Cited by in corpus (16)

• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• A White Paper on keV Sterile Neutrino Dark Matter
• Neutrino Mass and Mixing: from Theory to Experiment
• The Phenomenology of Right Handed Neutrinos
• The minimal 3+2 neutrino model versus oscillation anomalies
• Light Sterile Neutrinos: Status and Perspectives
• Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies
• Lepton-Jets and Low-Mass Sterile Neutrinos at Hadron Colliders
• Minimal 3+2 sterile neutrino model at LBNE
• Seesaw parametrization for n right-handed neutrinos
• Light Sterile Neutrinos, Left-Right Symmetry, and $0\nu \beta \beta$ Decay
• Neutrinoless double beta decay rates in the presence of light sterile neutrinos
• Mirror symmetry: from active and sterile neutrino masses to baryonic and dark matter asymmetries
• Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
• Sterile Neutrino Anarchy
• A Comprehensive Mechanism Reproducing the Mass and Mixing Parameters of Quarks and Leptons