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Sterile Neutrino as a Bulk Neutrino
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If light sterile neutrinos are needed to understand the neutrino puzzles, as is currently indicated, a major theoretical challenge is to understand why its mass is so small. It is a more serious problem than understanding the small mass of the familiar neutrinos. We discuss a new way to solve this problem by identifying the sterile neutrino as gauge neutral fermion propagating in the bulk of a higher dimensional theory, with bulk size of order of a millimeter. The smallness of its mass is then a consequence of the size of the extra dimension and does not need the introduction of new symmetries. We present a realistic model for neutrino masses and mixings that implements this idea.
Forward citations
Cited by 2 Pith papers
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Neutrino Portal to Extra Dimensions: Unified Origin of Dark Radiation, Dark Matter, and Neutrino Decay
A model with a bulk sterile neutrino and a Majoron claims to unify dark matter, dark radiation, and invisible neutrino decay, but its quoted parameter space is internally inconsistent.
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Do neutrinos dream in 5D? Towards a comprehensive extra-dimensional neutrino phenomenology
Surveys neutrino masses and mixing in 5D large extra dimension scenarios across four mass-generation cases and derives constraints from oscillation data.
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