Abstract
We report a search on sub-MeV fermionic dark matter absorbed by electrons with an outgoing active neutrino using the exposure collected by the PandaX-4T liquid xenon experiment. No significant signals are observed over the expected background. The data are interpreted into limits to the effective couplings between such dark matter and the electron. For axial-vector or vector interactions, our sensitivity is competitive in comparison to existing astrophysical bounds on the decay of such a dark matter candidate into photon final states. In particular, we present the first direct detection limits for a vector (axial-vector) interaction which are the strongest in the mass range from 35 to 55 in comparison to other astrophysical and cosmological constraints.
- Received 8 June 2022
- Accepted 18 August 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.161804
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
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Research News
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