Direct Search of Dark Matter in High-Scale Supersymmetry

TL;DR

This paper investigates the direct detection prospects of dark matter in high-scale supersymmetry models, focusing on neutralino interactions via Higgs exchange and electroweak loops, with implications for future experiments.

Contribution

It provides a detailed analysis of neutralino-nucleus scattering cross sections in high-scale SUSY, highlighting interference effects and experimental detectability.

Findings

Cross sections can be enhanced or suppressed due to interference effects.

Some parameter regions yield cross sections within future experimental reach.

Neutralino remains a viable dark matter candidate in high-scale SUSY.

Abstract

We study direct detection of dark matter in supersymmetric (SUSY) model where most of SUSY particles have very high-scale masses beyond the weak scale. In the scenario, Wino-like or Higgsino-like neutralino is a good candidate for the dark matter in the universe. The neutralino scatters off nuclei by a Higgs-boson exchange diagram and also electroweak loop diagrams. It is found that the elastic-scattering cross section with nuclei is enhanced or suppressed due to constructive or deconstructive interference among the diagrams. Such a cross section is within the reach of future experiment in some parameter region.