A Dark Matter candidate from Lorentz Invariance in 6 Dimensions

TL;DR

This paper introduces a 6D orbifold model with Lorentz invariance that naturally produces a stable scalar photon as a dark matter candidate, with distinctive spectral features and implications for collider detection.

Contribution

It presents a novel 6D orbifold model where Lorentz invariance ensures dark matter stability without extra symmetries, extending the minimal Kaluza-Klein dark matter framework.

Findings

Scalar photon in the 100 GeV range as dark matter candidate

Distinctive spectral features due to the orbifold geometry

Challenges for LHC detection due to small mass splittings

Abstract

We study the unique 6 dimensional orbifold with chiral fermions where a stable dark matter candidate is present due to Lorentz invariance on the orbifold, with no additional discrete symmetries imposed by hand. We propose a model of Universal Extra Dimensions where a scalar photon of few hundred GeV is a good candidate for dark matter. The spectrum of the model is characteristic of the geometry, and it has clear distinctive features compared to previous models of Kaluza-Klein dark matter. The 5 dimensional limit of this model is the minimal model of natural Kaluza-Klein dark matter. Notwithstanding the low mass range preferred by cosmology, the model will be a challenge for the LHC due to the relatively small splitting between the states in the same KK level.