Sterile Neutrino Anarchy

Abstract

Lepton mixing, which requires physics beyond the Standard Model, is surprisingly compatible with a minimal, symmetryless and unbiased approach, called anarchy. This contrasts with highly involved flavor symmetry models. On the other hand, hints for light sterile neutrinos have emerged from a variety of independent experiments and observations. If confirmed, their existence would represent a groundbreaking discovery, calling for a theoretical interpretation. We discuss anarchy in the two-neutrino eV-scale seesaw framework. The distributions of mixing angles and masses according to anarchy are in agreement with global fits for the active and sterile neutrino parameters. Our minimal and economical scenario predicts the absence of neutrinoless double beta decay and one vanishing neutrino mass, and can therefore be tested in future experiments.

4 pages, 4 figures, matches published version

References in corpus (5)

• Global status of neutrino oscillation parameters after Neutrino-2012
• The minimal 3+2 neutrino model versus oscillation anomalies
• Sterile Neutrinos in Light of Recent Cosmological and Oscillation Data: a Multi-Flavor Scheme Approach
• Seesaw parametrization for n right-handed neutrinos
• Minimally Allowed Neutrinoless Double Beta Decay Rates Within an Anarchical Framework