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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TLDR
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.
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