Testing fifth forces from the Galactic dark matter. (arXiv:1907.02232v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Shao_L/0/1/0/all/0/1">Lijing Shao</a>
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 $1%$ of the gravity.
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 $1%$ of the gravity.
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