Sterile neutrinos in U(1)' with R-parity Violation

Abstract

Motivated by results from short-baseline neutrino oscillation data, we study neutrino masses and mixing in U(1)' supersymmetric models with R-parity breaking. Whether R-parity is broken spontaneous or through (effective) bilinear terms in the Lagrangian, the breaking terms induce mixing between the neutralinos and neutrinos, creating a scenario in which some neutralinos can be heavy, and some light. Both the right-handed neutrino and the singlino (fermionic partner of the additional singlet Higgs field) can be light, and act as sterile neutrinos, which reconcile some of the anomalies observed in solar baseline and reactor experiments. We show that, scanning a large range of the parameter space satisfying solar and atmospheric neutrino constraints, the mass and mixing parameters of the sterile neutrinos are very restrictive, leading to some predictive features for the U(1)' scenarios.

28 pages, 2 figures, 4 tables, accepted for publication in PRD

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• Non-zero ${\theta }_{13}$ with Unbroken $\mu -\tau$ Symmetry of the Active Neutrino Mass Matrix in the Presence of a Light Sterile Neutrino
• Analysis of four-zero textures in $3+1$ framework
• Texture zeros of low-energy Majorana neutrino mass matrix in 3+1 scheme
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• Neutrino Phenomenology and Dark matter in an $A_4$ flavour extended B-L model