Abstract:

Despite its remarkable success in describing Nature, many things need to be understood beyond the Standard Model.
For example, as a peculiar part of the flavor puzzle, CP violation is explicit in the Standard Model and therefore can only be parametrized – but not predicted in size.
In this talk I want to discuss that C, P (and also T) transformations are symmetries of the symmetries of any model, and what that means.
Building on this, I will then show how CP violating phases can be predicted from complex Clebsch-Gordan coefficients of certain discrete (flavor) symmetries.
This opens up many interesting avenues for flavor model building, and could also be of great interest in a much wider context.