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Search for Light Fermionic Dark Matter Absorption on Electrons in PandaX-4T

Dan Zhang et al. (PandaX Collaboration)
Phys. Rev. Lett. 129, 161804 – Published 13 October 2022
Physics logo See Research News: Potential Dark Matter Signal Gives Way to New Limits

Abstract

We report a search on sub-MeV fermionic dark matter absorbed by electrons with an outgoing active neutrino using the 0.63tonneyear 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 (25to45)keV/c2 in comparison to other astrophysical and cosmological constraints.

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  • 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

Physics Subject Headings (PhySH)

Particles & Fields

Research News

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Potential Dark Matter Signal Gives Way to New Limits

Published 13 October 2022

Results from two leading dark matter experiments—XENONnT and PandaX-4T—rule out an enigmatic signal detected in 2020 and set new constraints on dark matter particle candidates consisting of light fermions, respectively.

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See Also

Search for New Physics in Electronic Recoil Data from XENONnT

E. Aprile et al. (XENON Collaboration)
Phys. Rev. Lett. 129, 161805 (2022)

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Vol. 129, Iss. 16 — 14 October 2022

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