On a reinterpretation of the Higgs field in supersymmetry and a proposal for new quarks

In this talk, in the framework of supersymmetry with right-handed neutrinos we will be able to reinterpret the Higgs superfields as a fourth family of leptons. From the theoretical viewpoint, this seems to be more satisfactory than the situation in usual supersymmetric models, where the Higgses are ‘disconnected’ from the rest of the matter and they have not a three-fold replication. Inspired by this interpretation of the Higgs superfields, we also propose the possible existence of a vector-like quark doublet representation in the low-energy supersymmetric spectrum. These new quark superfields have the implication of a potentially rich phenomenology at the LHC.