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- W1963575760 abstract "It has been shown that tribimaximal mixing can be obtained by some particular breaking pattern of the ${A}_{4}$ symmetry, wherein the extra ${A}_{4}$ triplet Higgs scalars pick up certain fixed vacuum expectation value (VEV) alignments. We have performed a detailed analysis of the different possible neutrino mass matrices within the framework of the ${A}_{4}$ model. We take into account all possible singlet and triplet Higgs scalars which leave the Lagrangian invariant under ${A}_{4}$. We break ${A}_{4}$ spontaneously, allowing the Higgs to take any VEV in general. We show that the neutrino mixing matrix deviates from tribimaximal, both due to the presence of the extra Higgs singlets, as well as from the deviation of the triplet Higgs VEV from its desired alignment, taken previously. We solve the eigenvalue problem for a variety of these illustrative cases and identify the ones where one obtains exact tribimaximal mixing. All such cases require fine-tuning. We show which neutrino mass matrices would be strongly disfavored by the current neutrino data. Finally, we study in detail the phenomenology of the remaining viable mass matrices and establish the deviation of the neutrino mixing from tribimaximal, both analytically as well as numerically." @default.
- W1963575760 created "2016-06-24" @default.
- W1963575760 creator A5037149267 @default.
- W1963575760 creator A5069868361 @default.
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- W1963575760 date "2008-04-24" @default.
- W1963575760 modified "2023-10-16" @default.
- W1963575760 title "<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>A</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>flavor symmetry and neutrino phenomenology" @default.
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- W1963575760 doi "https://doi.org/10.1103/physrevd.77.073008" @default.
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