Abstract
We present a search for dark matter particles with sub- masses whose interactions have final state electrons using the DarkSide-50 experiment’s low-radioactivity liquid argon exposure. By analyzing the ionization signals, we exclude new parameter space for the dark matter-electron cross section , the axioelectric coupling constant , and the dark photon kinetic mixing parameter . We also set the first dark matter direct-detection constraints on the mixing angle for sterile neutrinos.
- Received 28 July 2022
- Accepted 6 January 2023
DOI:https://doi.org/10.1103/PhysRevLett.130.101002
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