Strong coupling, discrete symmetry and flavour

Strong coupling and discrete symmetry can work together to generate the flavour structure of the Standard Model. It is proposed that the full UV theory has a discrete flavour symmetry, typically only associated with tribimaximal mixing in the neutrino sector. Hierarchies in the particle masses and mixing matrices emerge from multiple strongly coupled sectors that break this symmetry. This allows for a realistic flavour structure, even in models built around an underlying grand unified theory.