Monday, February 20, 2012

1110.4612 (Claudia Hagedorn et al.)

General Lepton Mixing in Holographic Composite Higgs Models    [PDF]

Claudia Hagedorn, Marco Serone
We introduce a scenario of lepton mixing in holographic composite Higgs
models based on non-abelian discrete symmetries of the form G_f=X x Z_N, broken
to Z_2 x Z_2 x Z_N in the elementary sector and to Z_N^(D) in the composite
sector with Z_N^(D) being the diagonal subgroup of a Z_N contained in X and the
external Z_N. By choosing X = Delta(96) or Delta(384), a non-vanishing
theta_{13} of order 0.1 is naturally obtained. We apply our considerations to a
5D model in warped space for the particular cases of X = S_4, A_5, Delta(96)
and Delta(384) and N=3 or 5. Lepton flavour violating processes and electric
dipole moments are well below the current bounds, with the exception of mu -> e
gamma that puts a very mild constraint on the parameter space of the model, for
all presented choices of G_f.
View original: http://arxiv.org/abs/1110.4612

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