Simple Model for (3+2) Neutrino Oscillations

Details Simple Model for (3+2) Neutrino Oscillations Simple Model for (3+2) Neutrino Oscillations

2003-12-19

arxiv.org/abs/hep-ph/0312285v2

Phys.Lett. B591 (2004) 127-136

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages in LaTeX, typos corrected, reference added

Scientific paper

10.1016/j.physletb.2004.03.086

We formulate a set of naturalness criteria for sterile neutrinos (\nu') 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 \nu' 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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