Scotogenic dark matter in an orbifold theory of flavor

TL;DR

This paper introduces a six-dimensional orbifold flavor theory where neutrino Diracness and dark matter stability emerge naturally from the model's symmetries and geometry, leading to realistic mass relations.

Contribution

It presents a novel orbifold-based flavor model that explains neutrino properties and dark matter stability through geometric and symmetry considerations.

Findings

Neutrinos are Dirac particles due to extra-dimensional effects.

Dark matter stability is linked to a $ ext{Z}_3$ symmetry and dark parity.

The model predicts a 'golden' quark-lepton mass relation.

Abstract

We propose a flavour theory in which the family symmetry results naturally from a six-dimensional orbifold compactification. "Diracness" of neutrinos is a consequence of the spacetime dimensionality, and the fact that right-handed neutrinos live in the bulk. Dark matter is incorporated in a scotogenic way, as a result of an auxiliary $\mathbb{Z}_3$ symmetry, and its stability is associated to the conservation of a "dark parity" symmetry. The model leads naturally to a "golden" quark-lepton mass relation.