Hunting for Hierarchies in PSL_2(7)

Speaker: Michael Jay Pérez, IFIC (Valencia)

Speaker arrival: 21/02/2016

Speaker departure: 27/02/2016

Assigned office: 23

Title: Hunting for Hierarchies in PSL_2(7)

Place: Seminario del Dpto Física Teórica y del Cosmos

Date: 22/02/2016

Time: 14:00

We present a model with the family group $mathcal{PSL}_2(7)$ wherein the top quark hierarchy, through SO(10) and the Seesaw mechanism, is mapped onto the vacuum values of familon fields and transferred to the ΔIw=0 parameters of the νMSSM: the right-handed neutrino Majorana mass and the μ term. It predicts tribimaximal mixing, and a normal hierarchy for the light neutrinos. The familon vacuum is used to derive the supersymmetric μ-masses of Higgs fields with family quantum numbers, as well as the Yukawa matrices of the quarks and leptons. We find, through the magic if $mathcal{PSL}_2(7)$ invariants, a μ-matrix with a hierarchy of thirteen orders of magnitude. Only one Higgs field (per hypercharge sector) is light enough (with a μ-mass ∼10−100 GeV) to be destabilized by SUSY soft breaking at the TeV scale. Remarkably, their vacuum values generate unsupressed masses only for t, b, and τ.