A Bottom-up analysis of horizontal symmetry - INSPIRE

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A Bottom-up analysis of horizontal symmetry

C.S. Lam
(
- McGill U. and
- British Columbia U.
)

Jul, 2009

15 pages

e-Print:

0907.2206 [hep-ph]

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Abstract: (arXiv)

The group-theoretical method used to derive horizontal symmetry from neutrino mixing is reviewed and expanded. Some misunderstanding in the literature regarding the result is clarified. The method used previously to find vacuum alignments of

S_4

is applied to compute those of

A_4

and

S_3

. A study of effective theories based on these three groups shows that in each case there are just enough free parameters to fit all the masses and the remaining mixing parameters. This places constraint on dynamical models because effective theories are just dynamical models with the right-handed fermions integrated out. How quarks may fit into this scheme is briefly discussed.

fermion: right-handed
neutrino: mixing
horizontal symmetry
group theory: S(4)
group theory: A(4)
vacuum state: alignment
Higgs particle: composite
quark: mixing

References(23)

Figures(0)

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