Abstract
We report constraints on the dark photon effective kinetic mixing parameter () with data taken from two -type point-contact germanium detectors of the CDEX-10 experiment at the China Jinping Underground Laboratory. The 90% confidence level upper limits on of solar dark photon from 205.4 kg-day exposure are derived, probing new parameter space with masses () from 10 to in direct detection experiments. Considering dark photon as the cosmological dark matter, limits at 90% confidence level with from 0.1 to are set from 449.6 kg-day data, with a minimum of at .
- Received 30 October 2019
- Accepted 26 February 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.111301
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society