Modular $S_4$ and $A_4$ Symmetries and Their Fixed Points: New Predictive Examples of Lepton Mixing

Gui-Jun Ding, Stephen F. King, Xiang-Gan Liu +1

In the modular symmetry approach to neutrino models, the flavour symmetry emerges as a finite subgroup $\hat{I}{“}_N$ of the modular symmetry, broken by the vacuum expectation value (VEV)…