# Discovery reach for wino and higgsino dark matter with a disappearing track signature at a 100 TeV $pp$ collider

## TL;DR

This paper evaluates the potential of a 100 TeV collider to detect wino and higgsino dark matter particles through disappearing track signatures, aiming to reach the thermal relic density limits.

## Contribution

It presents a detailed study of the discovery prospects for wino and higgsino dark matter at a future 100 TeV collider, including detector design modifications and background analysis.

## Key findings

- Potential to discover wino/higgsino dark matter at 100 TeV collider
- Strategies to extend detection to thermal relic density limits
- Proposed detector modifications to enhance sensitivity

## Abstract

Within the theory of supersymmetry, the lightest neutralino is a dark matter candidate and is often assumed to be the lightest supersymmetric particle (LSP) as well. If the neutral wino or higgsino is dark matter, the upper limit of the LSP mass is determined by the observed relic density of dark matter. If the LSP is a nearly-pure neutral state of the wino or higgsino, the lightest chargino state is expected to have a significant lifetime due to a tiny mass difference between the LSP and the chargino. This article presents discovery potential of the 100 TeV future circular hadron collider (FCC) for the wino and higgsino dark matter using a disappearing-track signature. The search strategy to extend the discovery reach to the thermal limits of wino/higgsino dark matter is discussed with detailed studies on the background rate and the reference design of the FCC-hadron detector under possible running scenarios of the FCC-hadron machine. A proposal of modifying the detector layout and several ideas to improve the sensitivity further are also discussed.