Towards the Final Word on Neutralino Dark Matter

TL;DR

This paper provides a comprehensive analysis of neutralino dark matter detection prospects, incorporating advanced calculations, and identifies the experimental strategies likely to discover or exclude all thermal relic neutralinos with masses below 4 TeV.

Contribution

It offers the first complete phenomenological prospectus for thermal relic neutralinos, including Sommerfeld effects and collider, direct, and indirect detection strategies.

Findings

Xenon1T and LZ will cover much of the neutralino parameter space.

Next-generation direct detection will find thermal relic higgsinos if M_{1,2}<4 TeV.

100 TeV collider searches can discover relic winos and bino-winos.

Abstract

We present a complete phenomenological prospectus for thermal relic neutralinos. Including Sommerfeld enhancements to relic abundance and halo annihilation calculations, we obtain direct, indirect, and collider discovery prospects for all neutralinos with mass parameters $M_1,M_2,|\mu| < 4$ TeV, that freeze out to the observed dark matter abundance, with scalar superpartners decoupled. Much of the relic neutralino sector will be uncovered by the direct detection experiments Xenon1T and LZ, as well as indirect detection with CTA. We emphasize that thermal relic higgsinos will be found by next-generation direct detection experiments, so long as $M_{1,2} < 4$ TeV. Charged tracks at a 100 TeV hadron collider complement indirect searches for relic winos. Thermal relic bino-winos still evade all planned experiments, including disappearing charged-track searches. However, they can be discovered by compressed electroweakino searches at a 100 TeV collider, completing the full coverage of the relic neutralino surface.