Pseudo-Dirac Neutrinos, a Challenge for Neutrino Telescopes
High Energy Physics - Phenomenology
2009-11-10 v2 Astrophysics
Abstract
Neutrinos may be pseudo-Dirac states, such that each generation is actually composed of two maximally-mixed Majorana neutrinos separated by a tiny mass difference. The usual active neutrino oscillation phenomenology would be unaltered if the pseudo-Dirac splittings are eV; in addition, neutrinoless double beta decay would be highly suppressed. However, it may be possible to distinguish pseudo-Dirac from Dirac neutrinos using high-energy astrophysical neutrinos. By measuring flavor ratios as a function of , mass-squared differences down to eV can be reached. We comment on the possibility of probing cosmological parameters with neutrinos.
Keywords
Cite
@article{arxiv.hep-ph/0307151,
title = {Pseudo-Dirac Neutrinos, a Challenge for Neutrino Telescopes},
author = {John F. Beacom and Nicole F. Bell and Dan Hooper and John G. Learned and Sandip Pakvasa and Thomas J. Weiler},
journal= {arXiv preprint arXiv:hep-ph/0307151},
year = {2009}
}
Comments
4 pages, 2 figures; minor changes, to appear in PRL