On the stability of the electroweak vacuum in the presence of low-scale seesaw models

Understand

The scale of neutrino masses and the Planck scale are separated by more than twenty-seven order of magnitudes.

• However, they can be linked by imposing the stability of the electroweak (EW) vacuum.
• The crucial ingredient is provided by the generation of neutrino masses via a seesaw mechanism triggered by Yukawa interactions between the standard model (SM) Higgs and lepton doublets and additional heavy right-handed neutrinos.
• These neutrinos participate to the renormalization group (RG) running of the dimensionless SM couplings, affecting their high-energy behavior.