Speaker
Description
We present two multi-scalar models, with S3 and Q6 flavour symmetries, respectively. We show how in general the doublet-singlet structure of these types of symmetries accommodates very well the quark sector and CKM matrix. In both models we check whether the co-bimaximal mixing pattern can be found in the neutrino sector. We use S3 as flavour symmetry in a B-L model, and we take complex vev's in the scalar potential and an inverse seesaw mechanism for generating the neutrino masses, in both cases with good fits to the respective mixing matrices. On the other hand, in the Q6 model we use a radiative seesaw to generate the neutrino masses and connect it to a dark sector, where we have 3 possible candidates. In this case, a numerical analysis shows that a combination of all LHC constraints on Higgs and exotic scalars, combined with dark matter constraints, single out a light scalar with mass ~98 GeV and a pseudoscalar with mass ~348 GeV, at the best fit point.
