Speaker
Junichiro Kawamura
(Kumamoto HS University)
Description
In this talk, I will show that a non-invertible selection rule can tame flavor violation induced by the portal Yukawa couplings of dark matter. In ordinary Abelian discrete symmetries without additional spurions, flavor-dependent charge assignments that forbid flavor-violating portal couplings do not allow a realistic PMNS matrix. This tension between the absence of flavor violation in the portal couplings and realistic lepton mixing can be resolved by using a non-invertible selection rule.
Author
Junichiro Kawamura
(Kumamoto HS University)