Model Building from Asymptotic Safety with Higgs and Flavor Portals

Understand

We perform a comprehensive search for Standard Model extensions inspired by asymptotic safety.

• Our models feature a singlet matrix scalar field, three generations of vector-like leptons, and direct links to the Higgs and flavor sectors via new Yukawa and portal couplings.
• A novel feature is that the enlarged scalar sector may spontaneously break lepton flavor universality.
• We provide a complete two-loop renormalization group analysis of the running gauge, Yukawa, and quartic couplings to find ultraviolet fixed points and the BSM critical surface of parameters, $i.e.$ the set of boundary conditions at the TeV scale for which models remain well-behaved and predictive up to the Planck scale without encountering Landau poles or instabilities.