Neutralino dark matter in gauge mediation

TL;DR

This paper investigates neutralino dark matter within gauge-mediated SUSY breaking models, analyzing four scenarios and their experimental viability, including prospects for future collider and direct detection tests.

Contribution

It introduces five-dimensional gauge mediation models with separated branes, exploring four distinct neutralino dark matter scenarios and their experimental implications.

Findings

Allowed parameter spaces identified for each scenario.

Models are consistent with current experimental limits.

Potential for testing at HL-LHC and direct detection experiments.

Abstract

We explore the potential of neutralino dark matter within the framework of gauge-mediated supersymmetry (SUSY) breaking. In our models, the lightest neutralino, as the lightest SUSY particle (LSP), is a viable dark matter candidate, assuming a gravitino mass of $\mathcal{O}(100)~\mathrm{TeV}$. The models are formulated in five-dimensional space-time, where the SUSY breaking field and the matter fields are placed on separate branes to avoid issues related to flavor and CP violation. Four distinct neutralino dark matter scenarios are studied: bino-wino coannihilation, higgsino dark matter, wino dark matter, and entropy-diluted bino dark matter. For each case, we determine the allowed parameter spaces and evaluate their consistency with existing experimental limits. Additionally, we examine the potential for testing these models through future investigations at the High-Luminosity Large Hadron Collider (HL-LHC) and through dark matter direct detection experiments.