Speaker
Eduardo Rojas
Description
A Peccei-Quinn (PQ) symmetry is proposed, in order to generate in the Standard Model (SM) quark sector a realistic mass matrix ansatz with five texture-zeros. Limiting our analysis to Hermitian mass matrices we show that this requires a minimum of 4 Higgs doublets. This model allows assigning values close to 1 for several Yukawa couplings, giving insight into the origin of the mass scales in the SM. Since the PQ charges are non-universal the model features Flavor-Changing Neutral Currents (FCNC) at the tree level. In the model We found a pseudoscalar Nambu-Goldstone which could be a dark matter candidate.
Primary authors
Eduardo Rojas
Juan Carlos Montenegro
Roberto Martinez
(Universidad Nacional de Colombia)
Yithsbey Giraldo Úsuga
(Universidad de Nariño)
