Dark matter relic density from observations of supersymmetry at the ILC

TL;DR

This paper discusses how the International Linear Collider (ILC) could observe supersymmetric particles, specifically stau coannihilation scenarios, to accurately predict and confirm the neutralino as the dark matter particle.

Contribution

It analyzes the observational requirements at the ILC to determine dark matter relic density and confirm the neutralino as the sole dark matter candidate in supersymmetry.

Findings

ILC can potentially discover coannihilating sparticles within its energy reach.

Observations at the ILC are crucial for accurate relic density predictions.

Confirmation of neutralino as the only dark matter particle depends on specific collider measurements.

Abstract

Supersymmetry can explain the observed dark matter relic density with a neutralino dark matter particle and a coannihilating, almost mass-degenerate sparticle. If this were the case in nature, a linear electron positron collider like the ILC could discover the two sparticles if their masses are in the kinematic reach of the collider. This contribution discusses which observations are necessary at the ILC for predicting the dark matter relic density correctly and for confirming that the observed lightest neutralino is the only kind of dark matter. We take the case of stau coannihilation as an example.