Dirac neutrinos from a second Higgs doublet

Details Dirac neutrinos from a second Higgs doublet Dirac neutrinos from a second Higgs doublet

2009-06-18

arxiv.org/abs/0906.3335v2

Phys.Rev.D80:095008,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures; v2: intro expanded, refs added, submitted to PRD

Scientific paper

10.1103/PhysRevD.80.095008

We propose a minimal extension of the Standard Model in which neutrinos are Dirac particles and their tiny masses are explained without requiring tiny Yukawa couplings. A second Higgs doublet with a tiny vacuum expectation value provides neutrino masses while simultaneously improving the naturalness of the model by allowing a heavier Standard Model-like Higgs boson consistent with electroweak precision data. The model predicts a mu to e gamma rate potentially detectable in the current round of experiments, as well as distinctive signatures in the production and decay of the charged Higgs H+ of the second doublet which can be tested at future colliders. Neutrinoless double beta decay is absent.

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