Charged Dark Matter in Supersymmetric Twin Higgs models

TL;DR

This paper proposes that twin stau particles in supersymmetric twin Higgs models can serve as charged dark matter candidates, with relic abundance matching observations and detectable signatures at future experiments and colliders.

Contribution

It introduces twin stau as a viable charged dark matter candidate within supersymmetric twin Higgs models, compatible with experimental constraints and detectable in upcoming experiments.

Findings

Twin stau can account for observed dark matter abundance.

Twin stau has a mass range of 300-500 GeV.

Detectable as long-lived particles at the LHC.

Abstract

Supersymmetric Twin Higgs models ameliorate the fine-tuning of the electroweak scale originating from the heavy scalar top partners required by the non-discovery of them at the Large Hadron Collider. If the Lightest Supersymmetric Particle resides in the twin sector, it may play the role of dark matter even if it is charged under twin gauge interactions. We show that the twin stau is a viable candidate for charged dark matter, even if the twin electromagnetic gauge symmetry is unbroken, with thermal relic abundance that naturally matches the observed dark matter abundance. A wide parameter space satisfies all the experimental constraints including those on dark matter self-interactions. Twin stau dark matter can be observed in future direct detection experiments such as LUX-ZEPLIN. The stau has a mass in the range of 300-500 GeV, and in the minimal scenario, has a decay length long enough to be observed as a disappearing track or a long-lived particle at the Large Hadron Collider.