Speaker
Javier Fuentes-Martín
(IFIC University of Valencia-CSIC)
Description
In this talk I will present two invisible axion model implementations. The first one consists in an ultraviolet completion of the so-called aligned two-Higgs-doublet model that solves the strong CP problem. I will show that, for certain decoupling scenarios, mixing effects among the scalar fields allow for the possibility to obtain a rich scalar sector at the weak scale.
The second model implementation is given by a class of invisible axion models with Flavour Changing Neutral Currents at tree-level controlled by the fermion mixing matrices. In this model, the PQ symmetry is constructed as a horizontal symmetry which provides a solution to the Strong CP problem and gives rise to a rich phenomenology. The presence of Flavour Changing Axion Interaction and the possibility to avoid the domain wall problem stand as the main features of this class of models.
Right-handed neutrinos are also introduced to account for the smallness of active neutrinos masses via a Type I see-saw mechanism that relates the PQ symmetry breaking and the see-saw scales. Experimental limits on the axion couplings will also be discussed.
Authors
Alejandro Celis
(IFIC CSIC-Universitat de Valencia)
Hugo Serodio
(Korea Advanced Institute of Science and Technology, Department of Physics)
Javier Fuentes-Martín
(IFIC University of Valencia-CSIC)
