Radiative Electroweak Symmetry Breaking in Standard Model Extensions

TL;DR

This paper investigates how loop corrections can induce electroweak symmetry breaking in various Standard Model extensions with additional TeV-scale scalars, where the mechanism is ineffective in the SM but successful in these models.

Contribution

It demonstrates that radiative electroweak symmetry breaking can occur in several SM extensions with TeV-scale scalars, unlike in the Standard Model itself.

Findings

Successful radiative symmetry breaking in models with TeV-scale scalars

Loop corrections turn positive Higgs mass parameter negative at low energy

Multiple models like type-II seesaw and inert doublet exhibit this mechanism

Abstract

We study the possibility of radiative electroweak symmetry breaking where loop corrections to the mass parameter of the Higgs boson trigger the symmetry breaking in various extensions of the Standard Model (SM). Although the mechanism fails in the SM, it is shown to be quite successful in several extensions which share a common feature of having an additional scalar around the TeV scale. The positive Higgs mass parameter at a high energy scale is turned negative in the renormalization group flow to lower energy by the cross couplings between the scalars in the Higgs potential. The type-II seesaw model with a TeV scale weak scalar triplet, a two-loop radiative neutrino mass model with new scalars at the TeV scale, the inert doublet model, scalar singlet dark matter model, and a universal seesaw model with an additional U(1) broken at the TeV scale are studied and shown to exhibit successful radiative electroweak symmetry breaking.