No-go limitations on UV completions of the Neutrino Option

TL;DR

This paper investigates the fundamental limitations on generating Majorana neutrino masses within the Neutrino Option framework, highlighting no-go constraints arising from global symmetries that challenge perturbative mass generation.

Contribution

It establishes theoretical no-go constraints on perturbative Majorana mass generation in the Neutrino Option, emphasizing the role of global symmetries in type-I seesaw models.

Findings

No-go constraints prevent perturbative Majorana mass generation due to global symmetries.

Constraints challenge the viability of certain UV completions for the Neutrino Option.

The results inform future model-building efforts for neutrino mass generation.

Abstract

We discuss the possible origin of the Majorana mass scale(s) required for the "Neutrino Option" where the electroweak scale is generated simultaneously with light neutrino masses in a type-I seesaw model, by common dimension four interactions. We establish no-go constraints on the perturbative generation of the Majorana masses required due to global symmetries of the seesaw Lagrangian.