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



Autor: F. del Aguila, J. de Blas, R. Szafron, J. Wudka, M. Zralek

Fuente: https://arxiv.org/



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