Abstract
We consider neutrino Minimal extension of the Standard Model (νMSM), which by introducing only three sterile neutrinos in sub-electroweak region can explain active neutrino oscillations (via seesaw type-I mechanism), baryon asymmetry of the Universe (leptogenesis via oscillations) and dark matter phenomena (with keV-scale sterile neutrino forming dark matter). We estimate sterile neutrino virtual contributions to various lepton flavor and lepton number violating processes. The contributions are too small, giving no chance for indirect searches to compete with direct measurements in exploring νMSM.
Highlights
The Standard Model of elementary particle physics (SM) is an extremely successful model, which has passed countless precision tests, and whose main predictions have been confirmed
The expected rates, except neutrinoless double β-decay2, are so tiny, that they leave no chance at all to find any hint of νMSM physics indirectly
If neutrinoless double beta decay will be found with the rate corresponding to the effective mass above the upper bound in (14) it would imply additional new physics in the neutrino sector
Summary
Dmitry Gorbunova,b, Inar Timiryasova,c aInstitute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312, Russia bMoscow Institute of Physics and Technology, Dolgoprudny 141700, Russia cPhysics Department, Moscow State University, Vorobievy Gory, Moscow 119991, Russia arXiv:1412.7751v2 [hep-ph] 10 Aug 2015
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