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arXiv · hep-ph/0312285

Simple Model for (3+2) Neutrino Oscillations

K. S. Babu·Gerhart Seidl
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Abstract

We formulate a set of naturalness criteria for sterile neutrinos (ν') to be light, needed for reconciling the LSND neutrino anomaly with the other neutrino data. A light sterile neutrino becomes as natural as the light active neutrinos if it carries quantum numbers of a chiral gauge symmetry broken at the TeV scale. The simplest such theory is shown to be an SU(2) gauge theory with the ν' transforming as a spin 3/2 multiplet. We develop this model and show that it leads naturally to the phenomenologically viable (3+2) neutrino oscillation scheme. We also present next-to-minimal models for light sterile neutrinos based on a chiral U(1) gauge symmetry.

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K. S. Babu, Gerhart Seidl. 2003-12-30. Simple Model for (3+2) Neutrino Oscillations. https://doi.org/10.1016/j.physletb.2004.03.086

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