A network of precision gravimeters as a detector of matter with feeble nongravitational coupling

Understand

Hidden matter that interacts only gravitationally would oscillate at characteristic frequencies when trapped inside of Earth.

• For small oscillations near the center of the Earth, these frequencies are around 300 $\mu$Hz.
• Additionally, signatures at higher harmonics would appear because of the non-uniformity of Earth's density.
• In this work, we use data from a global network of gravimeters of the International Geodynamics and Earth Tide Service (IGETS) to look for these hypothetical trapped objects.