Speaker
Bowen Fu
(Northeastern University, China)
Description
One of the most popular candidates for fermion flavour unification is the discrete flavour symmetry, including $A_4$, $S_4$, $A_5$, etc. The spontaneous breaking of discrete flavour symmetries can lead to the formation of domain walls, a kind of topological defect that can form during the phase transition in the early universe. We study this phenomenon in the scenarios of real and complex $A_4$ symmetric scalar theories and discover new kinds of domain walls, which we denote as ``oreo''-type composite domain walls and CP-violating domain walls.
Author
Bowen Fu
(Northeastern University, China)