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Journal Article

#### A_{4} flavor symmetry model for Dirac neutrinos and sizable U_{e3}

##### MPS-Authors

##### External Ressource

http://link.aps.org/doi/10.1103/PhysRevD.87.053021

(Publisher version)

##### Fulltext (public)

1301.2963

(Preprint), 1001KB

##### Supplementary Material (public)

There is no public supplementary material available

##### Citation

Memenga, N., Rodejohann, W., & Zhang, H. (2013). A_{4} flavor symmetry
model for Dirac neutrinos and sizable U_{e3}.* Physical Review D,* *87*(5):
053021, pp. 1-7. doi:10.1103/PhysRevD.87.053021.

Cite as: http://hdl.handle.net/11858/00-001M-0000-000E-F53E-E

##### Abstract

Models based on flavor symmetries are the most often studied approaches to
explain the unexpected structure of lepton mixing. In many flavor symmetry
groups a product of two triplet representations contains a symmetric and an
anti-symmetric term. If this product of two triplets corresponds to a Majorana
mass term, then the anti-symmetric part vanishes, and in economic models
tri-bimaximal mixing is achieved. If neutrinos are Dirac particles, the
anti-symmetric part is however present and leads to deviations from
tri-bimaximal mixing, in particular non-zero U(e3). Thus, the non-vanishing
value of U(e3) and the nature of the neutrino are connected. We illustrate this
with a model based on A(4) within the framework of a neutrinophilic 2 Higgs
doublet scenario.