Evidence for right-handed neutrinos at a neutrino factory

Details Evidence for right-handed neutrinos at a neutrino factory Evidence for right-handed neutrinos at a neutrino factory

2009-11-17

arxiv.org/abs/0911.3158v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex 18 pages, 2 eps figures

Scientific paper

We emphasize that a muon based neutrino factory could show the existence of light right-handed neutrinos, if a deficit in the number of detected events is observed at a near detector. This could be as large as ~10% if the size of the new interactions saturates the present limits from electroweak precision data, what is not excluded by the oscillation experiments performed up to now. A simple model realizing such a scenario can be obtained adding right-handed neutrinos to the minimal Standard Model, together with an extra scalar doublet and a triplet of hypercharge 1. In this case, however, the possible deficit is reduced by a factor of ~3, and the Yukawa couplings must be adequately chosen. This is also generically required if lepton flavour violation must be below present bounds.

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