Generalised CP and Trimaximal TM${}_1$ Lepton Mixing in $S_4$ Family Symmetry

Cai-Chang Li, Gui-Jun Ding

We construct two flavor models based on $S_4$ family symmetry and generalised CP symmetry. In both models, the $S_4$ family symmetry is broken down to the $Z_2^{SU}$ subgroup in th…