Leptophilic Dark Matter at Linear Colliders

TL;DR

This paper explores how future electron-positron linear colliders can set new, model-independent limits on leptophilic dark matter, especially for low-mass particles, complementing existing detection methods.

Contribution

It provides a comprehensive analysis of collider constraints on leptophilic dark matter couplings, highlighting the potential for superior sensitivity in the low-mass range.

Findings

Collider constraints are complementary to direct and indirect detection limits.

Future colliders can achieve the best sensitivity for dark matter below 10 GeV.

Mono-photon and mono-Z channels are effective for dark matter detection.

Abstract

We discuss model-independent collider constraints on the effective couplings of leptophilic dark matter (LDM), considering its production at a future electron-positron linear collider, with both polarized and unpolarized beam options, in the mono-photon and mono-$Z$ channels. We show that the future collider constraints are largely complementary to the direct and indirect detection limits on LDM, and can potentially provide the best-ever LDM sensitivity in the low-mass regime (below $\sim$ 10 GeV).