Testing fifth forces from the Galactic dark matter
Abstract
Is there an unknown long-range force between dark matter (DM) and ordinary matters? When such a fifth force exists and in the case that it is ignored, the equivalence principle (EP) is violated apparently. The violation of EP was severely constrained by, for examples, the E\"ot-Wash laboratory experiments, the lunar laser ranging, the MICROSCOPE satellite, and the long-term observation of binary pulsars. We discuss a recent bound that comes from PSR J1713+0747. When it is combined with the other bounds, a compelling limit on the hypothetical fifth force is derived. For the neutral hydrogen, the strength of such a fifth force should not exceed of the gravity.
Keywords
Cite
@article{arxiv.1907.02232,
title = {Testing fifth forces from the Galactic dark matter},
author = {Lijing Shao},
journal= {arXiv preprint arXiv:1907.02232},
year = {2022}
}
Comments
10 pages; accepted by the journal Proceedings; presented at the meeting "Recent Progress in Relativistic Astrophysics", 6-8 May 2019 (Shanghai, China)