A4flavor symmetry model for Dirac neutrinos and sizableUe3

2013/01/31 by Nina Memenga, Werner Rodejohann, He Zhang · 1 citation
Mathematics · Physics and Astronomy · #Antisymmetric relation #Cosmology and Gravitation Theories #Geometry #Homogeneous space #Mathematical physics #Mathematics #Mixing (physics) #Neutrino #Neutrino Physics Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Product (mathematics) #Quantum mechanics #Symmetry (geometry) #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.87.053021

published as Phys. Rev. D 87 (2013) 053021 · 8 pages, 2 figures

openalex publication_date 2013/03/26 · arxiv created 2013/04/02 · arxiv updated 2013/04/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 antisymmetric contraction to a triplet. If this product of two triplets corresponds to a Majorana mass term, then the antisymmetric part vanishes, and in economic models tribimaximal mixing is achieved. If neutrinos are Dirac particles, the antisymmetric part is, however, present and leads to deviations from tribimaximal mixing, in particular, nonzero U_e3. Thus, the nonvanishing value of U_e3 and the nature of the neutrino are connected. We illustrate this with a model based on A₄ within the framework of a neutrinophilic two Higgs doublet scenario.

Citations

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Symmetries and generalisations of tri-bimaximal neutrino mixing
• Nearly tri-bimaximal neutrino mixing and CP violation
• A4flavour symmetry breaking scheme for understanding quark and neutrino mixing angles
• A new two Higgs doublet model
• Theory and phenomenology of two-Higgs-doublet models
• Non-Abelian Discrete Symmetries in Particle Physics
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

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