Work

Probing For Non-Gravitational Galactic-Range Dark Matter Interactions

Year: 2025

Type: preprint

Abstract: Dark matter remains a mystery in fundamental physics. The only evidence for dark matter's existence is from gravitational interactions. We operated a precision torsion balance experiment to search for non-gravitational, galactic-range interactions between ordinary matter in our lab and the Milky Way's dark matter. We find no evidence of such interaction and set upper bounds on its strength that are a fourfold improvement over previous limits. These results constrain a variety of dark matter theories and test the equivalence principle towards dark matter.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2509.10701

Authors: Ross, M. P., Apple, S. K., Shaw, E. A., Gettings, C., Paulson, I. A., Gundlach, J. H.

Institution: University of Washington

Language: English

Topic: Dark Matter and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Science Foundation

Awards: Probing Fundamental Physics with Gravitational Experiments, Sensors for Low-Frequency Improvements in Advanced LIGO, Probing Fundamental Physics with Gravitational Experiments, Sensors for Low-Frequency Improvements in Advanced LIGO

OpenAlex ID: W4415090746

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