Inert scalar dark matter in an extra dimension inspired model

TL;DR

This paper explores an extra-dimensional inspired inert scalar dark matter model, analyzing its relic abundance, coannihilation effects, and potential experimental constraints, highlighting its similarities to and differences from existing models.

Contribution

It introduces a novel dark matter model based on Kaluza-Klein modes in extra dimensions, extending the inert singlet framework with new particle spectra and interactions.

Findings

Model converges to inert singlet predictions at large mass splitting.

Coannihilations significantly affect direct and indirect detection signals.

Kaluza-Klein zero mode can mix with the Higgs, imposing additional constraints.

Abstract

In this paper we analyze a dark matter model inspired by theories with extra dimensions. The dark matter candidate corresponds to the first Kaluza-Klein mode of a real scalar added to the Standard Model. The tower of new particles enriches the calculation of the relic abundance. For large mass splitting, the model converges to the predictions of the inert singlet dark matter model. For nearly degenerate mass spectrum, coannihilations increase the cross-sections used for direct and indirect dark matter searches. Moreover, the Kaluza-Klein zero mode can mix with the SM higgs and further constraints can be applied.