期刊
PHYSICAL REVIEW LETTERS
卷 123, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.251801
关键词
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资金
- National Science Foundation
- Swiss National Science Foundation
- German Ministry for Education and Research
- Max Planck Gesellschaft
- Deutsche Forschungsgemeinschaft
- Netherlands Organisation for Scientific Research (NWO)
- Netherlands eScience Center (NLeSC)
- SURF Cooperative
- Weizmann Institute of Science
- Israeli Centers of Research Excellence (I-CORE)
- Pazy-Vatat
- Fundacao para a Ciencia e a Tecnologia
- Region des Pays de la Loire
- Knut and Alice Wallenberg Foundation
- Kavli Foundation
- Istituto Nazionale di Fisica Nucleare
- European Union's Horizon 2020 research and innovation programme under the Marie SklodowskaCurie Grant [690575, 674896]
- Laboratori Nazionali del Gran Sasso
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 (22 +/- 3) tonne day. Above similar to 0.4 keV(ee), we observe <1 event/(tonne day keV(ee)), 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 m(chi) within 3-6 GeV/c(2), DM-electron scattering for m(chi) > 30 MeV/c(2), and absorption of dark photons and axionlike particles for m(chi) within 0.186-1 keV/c(2).
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