Dark Scalar Doublets and Neutrino Tribimaximal Mixing from A_4 Symmetry

Details Dark Scalar Doublets and Neutrino Tribimaximal Mixing from A_4 Symmetry Dark Scalar Doublets and Neutrino Tribimaximal Mixing from A_4 Symmetry

2008-08-13

arxiv.org/abs/0808.1729v2

Phys.Lett.B671:366-368,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures, 1 reference and 1 paragraph added

Scientific paper

10.1016/j.physletb.2008.12.038

In the context of A_4 symmetry, neutrino tribimaximal mixing is achieved through the breaking of A_4 to Z_3 (Z_2) in the charged-lepton (neutrino) sector respectively. The implied vacuum misalignment of the (1,1,1) and (1,0,0) directions in A_4 space is a difficult technical problem, and cannot be treated without many auxiliary fields and symmetries (and perhaps extra dimensions). It is pointed out here that an alternative scenario exists with A_4 alone and no redundant fields, if neutrino masses are "scotogenic", i.e. radiatively induced by dark scalar doublets as recently proposed.

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