Neutrino mass in radiatively-broken scale-invariant models

TL;DR

This paper explores how neutrino masses can arise in minimal scale-invariant models where electroweak symmetry breaking is radiatively induced, focusing on both tree-level and radiative mechanisms within a simple extension of the standard model.

Contribution

It investigates the generation of neutrino masses in a minimal scale-invariant framework, highlighting potential mechanisms at tree-level and through radiative corrections.

Findings

Neutrino masses can originate from radiative effects in these models.

The Higgs boson acts as a pseudo-Goldstone boson of broken scale invariance.

The model provides a consistent way to incorporate neutrino masses without explicit mass terms.

Abstract

Scale invariance may be a classical symmetry which is broken radiatively. This provides a simple way to stabilize the scale of electroweak symmetry breaking against radiative corrections. The simplest phenomenologically successful model of this type involves the addition of one real scalar field to the standard model. In this minimal model the electroweak Higgs can be interpreted as the pseudo-Goldstone boson of broken scale invariance. We study the possible origin of neutrino mass in such models, both at tree-level and radiatively.