Inverse Seesaw from dynamical $\mathbf{B-L}$ breaking

TL;DR

This paper explores a dynamical origin for the inverse seesaw mechanism through spontaneous breaking of a gauged B-L symmetry, introducing new fermions and a Z' boson with unique dark sector interactions.

Contribution

It proposes a novel dynamical model for inverse seesaw neutrino masses via B-L breaking, including anomaly-free fermions and a dark sector Z' boson.

Findings

Introduction of anomaly-free fermions with interesting phenomenology

Prediction of a Z' boson interacting with dark sector fermions

Potential for an elusive Z' boson due to dark sector interactions

Abstract

The Inverse Seesaw scenario relates the smallness of the neutrino masses to a small $B-L$ breaking parameter. We investigate a possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged $U(1)_{B-L}$. To obtain an anomaly free theory we need to introduce additional fermions which exhibit an interesting phenomenology. Additionally, we predict a $Z'$ boson associated to the broken $B-L$ which preferentially interacts with the dark sector formed by the extra fermions making it particularly elusive.