Light Dark Matter Scattering in Gravitational Wave Detectors

Chun-Hao Lee^1*, Chrisna Setyo Nugroho², Martin Spinrath¹

¹Department of Physics, National Tsing Hua University, Hsinchu City, Taiwan
²Physics Division, National Center for Theoretical Sciences, Hsinchu City, Taiwan

* Presenter:Chun-Hao Lee, email:chlee@gapp.nthu.edu.tw

We present prospects for discovering dark matter scattering in gravitational wave detectors. The focus of this work is on light, particle dark matter with masses below 1 GeV/c². We investigate how a potential signal compares to typical backgrounds like thermal and quantum
noise, first in a simple toy model and then using KAGRA as a realistic example. That shows that for a discovery much lighter and cooler mirrors would be needed. We also give some brief comments on space-based experiments and future atomic interferometers.

Keywords: Dark Matter, Gravitational Wave Interferometer, KAGRA