Probing gaugino coannihilation with displaced vertex searches

TL;DR

This paper explores how displaced vertex searches at the LHC can test bino-gaugino coannihilation scenarios in supersymmetric models, addressing dark matter over-production issues.

Contribution

It demonstrates that long-lived particle searches can effectively probe bino-gaugino coannihilation in high-scale supersymmetry.

Findings

Displaced vertex searches can test bino-gaugino coannihilation.

Long-lived particles are key signatures for this scenario.

Upcoming LHC runs have potential to confirm or exclude these models.

Abstract

Bino-like dark matter in supersymmetric theories tends to suffer from over-production. This problem can be evaded if there is another gaugino which has a mass close to the bino mass so that it enhances the annihilation rate of bino dark matter through coannihilation. We study such possibilities in high-scale supersymmetric models, and show that searches for long-lived particles with displaced vertices can test the bino-gaugino coannihilation scenario in the forthcoming LHC experiments.