Improved Bounds on Ultralight Scalar Dark Matter in the Radio-Frequency Range
Abstract
We present a search for fundamental constant oscillations in the range 20 kHz-100 MHz that may arise within models for ultralight dark matter (UDM). Using two independent optical-spectroscopy apparatuses, we achieve up to ×1000 greater sensitivity in the search relative to previous work [D. Antypas et al., Phys. Rev. Lett. 123, 141102 (2019)., 10.1103/PhysRevLett.123.141102]. We report no observation of UDM and thus constrain respective couplings to electrons and photons within the investigated UDM particle mass range 8 ×10-11- 4 ×10-7 eV . The constraints significantly exceed previously set bounds from atomic spectroscopy and, as we show, may surpass in future experiments those provided by equivalence-principle (EP) experiments in a specific case regarding the combination of UDM couplings probed by the EP experiments.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2022
- DOI:
- 10.1103/PhysRevLett.129.031301
- arXiv:
- arXiv:2201.02042
- Bibcode:
- 2022PhRvL.129c1301T
- Keywords:
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- High Energy Physics - Phenomenology;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- Physics - Atomic Physics;
- Quantum Physics
- E-Print:
- 13 pages, 11 figures