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arXiv · hep-ph/9808236

Sterile Neutrinos: Phenomenology and Theory

R. N. Mohapatra
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Abstract

A sterile neutrino in addition to the three known neutrinos seems unavoidable if one wants a simultaneous understanding of the results of the LSND experiment indicating $ν_μ-ν_e$ oscillation together with other evidences for neutrino oscillations such as those from solar and atmospheric neutrino deficits. A major theoretical challenge then is to understand why the sterile neutrino is so light. A simple solution appears to be to assume that it is the lightest neutrino of a mirror sector of the universe which has identical matter and gauge content as the standard model. After a brief review of the phenomenology, a recently constructed realistic grand unified model based on the gauge group $SO(10)\times SO(10)^\prime$ that embeds the mirror universe idea is presented. Detailed predictions for known and the sterile neutrino sector are given and their consequences for cosmology are mentioned.

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R. N. Mohapatra. 1998-08-05. Sterile Neutrinos: Phenomenology and Theory. https://doi.org/10.1063/1.59426

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