Probing Bino-Gluino Coannihilation at the LHC

TL;DR

This paper investigates the potential of the LHC to detect bino-gluino coannihilation scenarios in high-scale SUSY models, focusing on long-lived colored particles with displaced vertices as key signatures.

Contribution

It introduces a novel approach to probe bino-gluino coannihilation in high-scale SUSY models using displaced vertex searches at the LHC.

Findings

Displaced vertex searches can effectively test bino-gluino coannihilation scenarios.

Long-lived colored particles are promising signatures for collider detection.

The study provides parameter space regions accessible at the LHC.

Abstract

It has been widely known that bino-like dark matter in the supersymmetric (SUSY) theories in general suffers from over-production. The situation can be drastically improved if gluinos have a mass slightly heavier than the bino dark matter as they reduce the dark matter abundance through coannihilation. In this work, we consider such a bino-gluino coannihilation scenario in high-scale SUSY models, which can be actually realized when the squark-mass scale is less than 100-1000 TeV. We study the prospects for exploring this bino-gluino coannihilation scenario at the LHC. We show that the searches for long-lived colored particles with displaced vertices offer a strong tool to test this scenario in collider experiments.