# A4 symmetry and lepton masses and mixing

```@article{Koide2007A4SA,
title={A4 symmetry and lepton masses and mixing},
author={Yoshio Koide},
journal={The European Physical Journal C},
year={2007},
volume={52},
pages={617-623}
}```
• Y. Koide
• Published 3 January 2007
• Physics
• The European Physical Journal C
AbstractStimulated by Ma’s idea, which explains the tribimaximal neutrino mixing by assuming an A4 flavor symmetry, a lepton mass matrix model is investigated. A Frogatt–Nielsen-type model is assumed, and the flavor structures of the masses and mixing are caused by the VEVs of SU(2)L singlet scalars φiu and φid (i=1,2,3), which are assigned to 3 and (1 ,1 ’,1 ”) of A4, respectively. Possible charged lepton and neutrino mass spectra and mixing are investigated.
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## References

SHOWING 1-10 OF 45 REFERENCES
S3 symmetry and neutrino masses and mixings
Based on the universal seesaw mass matrix model with the three scalars φi, and by assuming S3 flavor symmetry for the Yukawa interactions, the lepton masses and mixings are investigated
Permutation symmetries and the fermion mass matrix
• Physics
• 1982
We consider SU(2) x U(1) gauge models with an additional global symmetry of S/sub n/ type. In particular, we study S/sub 4/ symmetry for a six-quark--six-lepton standard model. We find that the
U(3)-family nonet Higgs boson and its phenomenology
• Physics
• 1996
In a model where quark and lepton masses and family-mixings are caused not by a variety of Yukawa couplingsyij(i,j=1, 2, 3: family indices) with one vacuum expectation value (VEV)ν=〈φL0〉0, but by a
New view of quark and lepton mass hierarchy
The hierarchical structure of realistic quark and lepton masses is investigated on the basis of a three-family model, where masses and mixings of the first- and second-generation quarks are
Top-quark-mass enhancement in a seesaw-type quark mass matrix
• Physics
• 1996
We investigate the implications of a seesawtype mass matrix, i.e.,Mf⋍mLMF−1mR, for quarks and leptonsf under the assumption that the matricesmL andmR are common to all flavors (up-/down- and
Tribimaximal mixing, discrete family symmetries, and a conjecture connecting the quark and lepton mixing matrices
• Mathematics
• 2003
Neutrino oscillation experiments (excluding the LSND experiment) suggest a tri-bimaximal form for the lepton mixing matrix. This form indicates that the mixing matrix is probably independent of the
Form invariance of the neutrino mass matrix.
• E. Ma
• Physics
Physical review letters
• 2003
This paper proposes that for any M one may choose, it should satisfy the condition UMU(T)=M, where U not equal 1 is a specific unitary matrix such that U(N) represents a well-defined discrete symmetry in the nu(e,micro,tau) basis.