The Dark Side of a Tera-Z Factory

TL;DR

This paper explores how future Tera-Z factories, like FCC-ee or CEPC, can indirectly detect dark matter through precision electroweak tests, complementing direct searches and revealing new physics.

Contribution

It analyzes the potential of Tera-Z colliders to indirectly probe dark matter scenarios involving a t-channel mediator, highlighting their sensitivity beyond direct detection methods.

Findings

Tera-Z factories can effectively probe dark matter properties indirectly.

Synergy between collider and non-collider dark matter searches enhances discovery prospects.

Future colliders offer unprecedented sensitivity to new physics in electroweak precision tests.

Abstract

The future circular $e^+e^-$ collider (FCC-ee or CEPC) will provide unprecedented sensitivity to indirect new physics signals emerging as small deviations from the Standard Model predictions in electroweak precision tests. Assuming new physics scenarios containing a dark matter candidate and a $t$-channel mediator, we analyse the synergy and interplay of future Tera-$Z$ factories and non-collider tests conducted through direct and indirect searches of dark matter. Our results highlight the excellent prospect for a Tera-$Z$ run to indirectly probe the presence and nature of dark matter.