Speaker
Marco Carducci
(Romatre university (INFN))
Description
We consider a modular-invariant SU(5) model supplemented, for the first time, by a spontaneously broken generalized CP symmetry. Therefore, CP violation originates solely from the vacuum expectation value of the modulus, whose real component acts as the unique source of CP breaking. In the lepton sector, neutrino masses are generated via a type I+III seesaw mechanism, thanks to a single adjoint superfield, whose scalar VEV plays a role in determining fermion mass hierarchies.