See-Saw Energy Scale and the LSND Anomaly

Details See-Saw Energy Scale and the LSND Anomaly See-Saw Energy Scale and the LSND Anomaly

2005-01-07

arxiv.org/abs/hep-ph/0501039v1

Phys.Rev. D72 (2005) 033005

Physics

High Energy Physics

High Energy Physics - Phenomenology

revtex, 4 pages, no figures

Scientific paper

10.1103/PhysRevD.72.033005

The most general, renormalizable Lagrangian that includes massive neutrinos contains ``right-handed neutrino'' Majorana masses of order M. While there are prejudices in favor of M much larger than the weak scale, virtually nothing is known about the magnitude of M. I argue that the LSND anomaly provides, currently, the only experimental hint: M around 1 eV. If this is the case, the LSND mixing angles are functions of the active neutrino masses and mixing and, remarkably, adequate fits to all data can be naturally obtained. I also discuss consequences of this ``eV-seesaw'' for supernova neutrino oscillations, tritium beta-decay, neutrinoless double-beta decay, and cosmology.

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