Discovery prospects for heavy dark matter in KAGRA

TL;DR

This paper explores KAGRA's potential to detect kg-scale dark matter with long-range interactions, showing it could constrain or observe such dark matter within a few years, especially for masses around 10 kg.

Contribution

It introduces a novel method for detecting heavy dark matter with long-range interactions using gravitational wave detectors like KAGRA.

Findings

KAGRA can constrain long-range dark matter interactions within a few years.

Detection of a few dark matter events per year is possible for 10 kg mass with specific interaction parameters.

KAGRA's directional sensitivity enhances detection prospects for certain dark matter interaction geometries.

Abstract

We discuss the discovery prospects for kg-scale dark matter with a Yukawa-like long-range interaction in Kamioka Gravitational Wave Detector (KAGRA). We consider the interaction range to be in the order of kilometers, thus the dark matter may interact with multiple KAGRA mirrors simultaneously. The induced signal strain is in many cases dominated by frequencies below about 130 Hz. Due to the geometry of the detector there is some strong directional sensitivity. It turns out that KAGRA would be able to constrain such kind of dark matter within a few years of operation. With our set of assumptions we expect that KAGRA could detect a few events per year for 10 kg dark matter, with a Yukawa interaction with a range of 10 km and an effective coupling constant around $10^6$.