Living Orthogonally: Quasi-universal Extra Dimensions

TL;DR

This paper introduces a six-dimensional model with orthogonal localization of matter fields and bulk gauge bosons, resolving constraints of minimal Universal Extra Dimensions and enabling multi-TeV dark matter candidates.

Contribution

It proposes a novel 6D framework with orthogonal matter localization, overcoming minimal UED limitations and predicting new experimental signatures.

Findings

Compatible with current constraints on extra dimensions

Allows multi-TeV dark matter without fine-tuning

Predicts new signatures at LHC and future experiments

Abstract

The minimal Universal Extra Dimension scenario is highly constrained owing to opposing constraints from the observed relic density on the one hand, and the non-observation of new states at the LHC on the other. Simple extensions in five-dimensions can only postpone the inevitable. Here, we propose a six-dimensional alternative with the key feature being that the SM quarks and leptons are localized on orthogonal directions whereas gauge bosons traverse the entire bulk. Several different realizations of electroweak symmetry breaking are possible, while maintaining agreement with low energy observables. This model is not only consistent with all the current constraints opposing the minimal Universal Extra Dimension scenario but also allows for a multi-TeV dark matter particle without the need for any fine-tuning. In addition, it promises a plethora of new signatures at the LHC and other future experiments.