Light Sterile Neutrinos: Models and Phenomenology

Abstract

Motivated by recent hints in particle physics and cosmology, we study the realization of eV-scale sterile neutrinos within both the seesaw mechanism and flavor symmetry theories. We show that light sterile neutrinos can rather easily be accommodated in the popular A_4 flavor symmetry models. The exact tri-bimaximal mixing pattern is perturbed due to active-sterile mixing, which we discuss in detail for one example. In addition, we find an interesting extension of the type I seesaw, which can provide a natural origin for eV-scale sterile neutrinos as well as visible admixtures between sterile and active neutrinos. We also show that the presence of sterile neutrinos would significantly change the observables in neutrino experiments, specifically the oscillation probabilities in short-baseline experiments and the effective mass in neutrino-less double beta decay. The latter can prove particularly helpful to strengthen the case for eV-scale sterile neutrinos.

30 pages, 6 figures; v2: minor additions, references added, matches published version

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Cited by in corpus (46)

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• Neutrinoless Double-Beta Decay: a Probe of Physics Beyond the Standard Model
• Sterile Neutrinos
• Neutrino Masses from a Dark Neutrino Sector below the Electroweak Scale
• Signatures of Extra Dimensional Sterile Neutrinos
• Heavy neutral leptons below the kaon mass at hodoscopic detectors
• Bound on 3+1 active-sterile neutrino mixing from the first four-week science run of KATRIN
• Naturally Stable Right-Handed Neutrino Dark Matter
• Diagnosing the Reactor Antineutrino Anomaly with Global Antineutrino Flux Data
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• Sterile Neutrino Shape-shifting Caused by Dark Matter
• Neutrinoless Double Beta Decay in LRSM with Natural Type-II seesaw Dominance
• A testable hidden-sector model for Dark Matter and neutrino masses
• Majorana neutrino mass matrices with three texture zeros and the sterile neutrino
• Constraining Sterile Neutrinos Using Reactor Neutrino Experiments
• The quest for neutrinoless double beta decay: Pseudo-Dirac, Majorana and sterile neutrinos
• Light Sterile Neutrinos, Left-Right Symmetry, and $0\nu \beta \beta$ Decay
• Half-life Expectations for Neutrinoless Double Beta Decay in Standard and Non-Standard Scenarios
• Non-zero ${\theta }_{13}$ with Unbroken $\mu -\tau$ Symmetry of the Active Neutrino Mass Matrix in the Presence of a Light Sterile Neutrino
• Large neutrino mass in cosmology and keV sterile neutrino dark matter from a dark sector
• Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme
• Displaced Neutrino Jets at the LHeC
• Another look at the impact of an eV-mass sterile neutrino on the effective neutrino mass of neutrinoless double-beta decays
• Constraining models for keV sterile neutrinos by quasi-degenerate active neutrinos
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• Deviations in Tribimaximal Mixing From Sterile Neutrino Sector
• Roles of sterile neutrinos in particle physics and cosmology
• Neutrinoless Double Beta Decay from Scalar Leptoquarks: Interplay with Neutrino Mass and Flavor Physics
• New mixing schemes for (3+1) neutrinos
• Constraining the Effective Mass of Majorana Neutrino with Sterile Neutrino Mass for Inverted Ordering Spectrum
• Leptogenesis and eV scale sterile neutrino
• Lepton masses and mixings, and muon anomalous magnetic moment in an extended $B-L$ model with type I seesaw mechanism
• Light, Unstable Sterile Neutrinos: Phenomenology, a Search in the IceCube Experiment, and a Global Picture
• Phasing out of Darkness: From Sterile Neutrino Dark Matter to Neutrino Masses via Time-Dependent Mixing
• Neutrino phenomenology and keV dark matter in 2HDM with $A_4$ symmetry
• Inference of neutrino nature and Majorana CP phases from $0\nu \beta \beta$ decays with inverted mass ordering
• Restricting Sterile Neutrinos by Neutrinoless Double Beta Decay
• The effect of non-standard interactions and environmental decoherence at DUNE
• Light sterile neutrino and leptogenesis
• Study of neutrinoless double beta decay in the Standard Model extended with sterile neutrinos
• Low-scale minimal linear seesaw model for neutrino mass and flavor mixing
• New parameter region in sterile neutrino searches: a scenario to alleviate cosmological neutrino mass bound and its testability at oscillation experiments
• Theoretical and phenomenological consequences of active and sterile neutrino within Beyond Standard Model framework
• FIMP DM in the Extended Hyperchargeless Higgs Triplet Model
• The eV-Scale Sterile Neutrino and Neutrinoless Double Beta Decay