Junichiro Kawamura (IBS Korea)

2:00pm Thursday February 15, 2024
Geoff Opat Seminar Room

Finite modular symmetry for flavor hierarchies and strong CP

The finite modular symmetry is an interesting possibility to understand the nature of our universe. In the first part, I will explain how the hierarchical structure of the quark and lepton masses and mixing are realized by the symmetry. We found that the residual ZN symmetry plays the role of the discrete Froggatt-Nielsen mechanism. We show the first example to explain both quark and lepton sectors simultaneously, and that in the SU(5) grand unification. In the second part, I will discuss a new simple setup to stabilize the modulus field, and then argue that it may provide the axion solution to the strong CP problem in QCD.