Common origin of reactor and sterile neutrino mixing

Abstract

If the hints for light sterile neutrinos from short-baseline anomalies are to be taken seriously, global fits indicate active-sterile mixings of a magnitude comparable to the known reactor mixing. We therefore study the conditions under which the active-sterile and reactor mixings could have the same origin in an underlying flavour model. As a starting point, we use $\mu -\tau$ symmetry in the active neutrino sector, which (for three neutrinos) yields a zero reactor neutrino angle and a maximal atmospheric one. We demonstrate that adding one sterile neutrino can change this setting, so that the active-sterile mixing and non-zero ${\theta }_{13}$ can be generated simultaneously. From the phenomenological perspective, electron (anti)neutrino disappearance can be easily accommodated, while muon neutrino disappearance can vanish. It is, however, difficult to reconcile the LSND results with this scenario. From the theory perspective, the setting requires the misalignment of some of the flavon vacuum expectation values, which may be achieved in an $A_4$ or $D_4$ flavour symmetry model using extra dimensions.

27 pages, 5 figures; v2: analysis extended to also include non-zero Majorana phases; accepted by JHEP

References in corpus (16)

• Observation of electron-antineutrino disappearance at Daya Bay
• Global fit to three neutrino mixing: critical look at present precision
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• A possible symmetry of the $\nu$MSM
• Neutrino tri-bi-maximal mixing from a non-Abelian discrete family symmetry
• Light Sterile Neutrinos: Models and Phenomenology
• Where to find a dark matter sterile neutrino?
• Constraining DM properties with SPI
• Constraints on the parameters of radiatively decaying dark matter from the dark matter halo of the Milky Way and Ursa Minor
• Sterile neutrinos in the Milky Way: Observational constraints
• Soft L_e-L_mu-L_tau flavour symmetry breaking and sterile neutrino keV Dark Matter
• A_4 model for the quark mass matrices
• Sterile neutrinos at the CNGS
• Composite Dirac Neutrinos
• KeV Warm Dark Matter and Composite Neutrinos
• LSND reloaded

Cited by in corpus (14)

• A White Paper on keV Sterile Neutrino Dark Matter
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• Octant of ${\theta }_{23}$ in danger with a light sterile neutrino
• The $\mu$-$\tau$ reflection symmetry of Majorana neutrinos
• [Re]constructing Finite Flavour Groups: Horizontal Symmetry Scans from the Bottom-Up
• Reevaluating Reactor Antineutrino Anomalies with Updated Flux Predictions
• Generating ${\theta }_{13}$ from sterile neutrinos in $\mu -\tau$ symmetric models
• Compatibility of $A_4$ Flavour Symmetric Minimal Extended Seesaw with $(3+1)$ Neutrino Data
• Non-zero ${\theta }_{13}$ with Unbroken $\mu -\tau$ Symmetry of the Active Neutrino Mass Matrix in the Presence of a Light Sterile Neutrino
• Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme
• Realization of the minimal extended seesaw mechanism and the $T{M}_2$ type neutrino mixing
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• Consequences of $\mu$-$\tau$ reflection symmetry for $3+1$ neutrino mixing
• Dirac CP phases in a 3+1 neutrino scenario with $\mu -\tau$ symmetry