Abstract
We report constraints on light dark matter (DM) models using ionization signals in the XENON1T experiment. We mitigate backgrounds with strong event selections, rather than requiring a scintillation signal, leaving an effective exposure of () tonne day. Above , we observe , which is more than 1000 times lower than in similar searches with other detectors. Despite observing a higher rate at lower energies, no DM or CEvNS detection may be claimed because we cannot model all of our backgrounds. We thus exclude new regions in the parameter spaces for DM-nucleus scattering for DM masses within , DM-electron scattering for , and absorption of dark photons and axionlike particles for within .
- Received 29 July 2019
- Revised 7 November 2019
DOI:https://doi.org/10.1103/PhysRevLett.123.251801
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)
Synopsis
New Analysis Tightens Constraints on Light Dark Matter
Published 17 December 2019
By reanalyzing experimental data from 2017 and 2018, the XENON Collaboration rules out several varieties of low-mass dark matter, including a range of axion-like particles and dark photons.
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