Direct detection of Ultra-High Energy WIMPs with a satellite detector like JEM-EUSO

TL;DR

This paper explores the potential for detecting ultra-high energy WIMPs using the JEM-EUSO satellite detector by analyzing their interactions with air nuclei, estimating detection rates over ten years.

Contribution

It provides a novel evaluation of the detectability of UHE WIMPs with JEM-EUSO, considering energy thresholds to distinguish from neutrino background.

Findings

UHE WIMPs can be detected at energies above 20 EeV.

Approximately 10-100 UHE WIMP events could be observed in ten years.

Neutrino events can be effectively rejected at high energy thresholds.

Abstract

The possibility of directly detecting Ultra-high energy (UHE from now on) WIMPs are considered by the WIMPs interaction with the nuclei in the air. Since neutrinos dominate the events from the spherical crown near JEM-EUSO, all the events from this region are ignored in my work. Then the numbers of UHE WIMPs and neutrino detected by JEM-EUSO are evaluated at different energies (1 PeV < E < 100 EeV) in ten years, respectively. If the energy thresholds are taken to be 20 EeV, neutrino events can be almost rejected in the detection of UHE WIMPs. According to my evaluation, O(10-100) UHE WIMP events can be detected by JEM-EUSO at energies above 20 EeV in ten years.