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Light Dark Matter Search with Ionization Signals in XENON1T
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 1332019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 123, no 25, article id 251801Article in journal (Refereed) Published
Abstract [en]

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).

Place, publisher, year, edition, pages
2019. Vol. 123, no 25, article id 251801
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Physical Sciences
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URN: urn:nbn:se:su:diva-177437DOI: 10.1103/PhysRevLett.123.251801ISI: 000503050000004OAI: oai:DiVA.org:su-177437DiVA, id: diva2:1385909
Available from: 2020-01-15 Created: 2020-01-15 Last updated: 2020-01-15Bibliographically approved

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Aalbers, JelleAntochi, Vasile C.Barge, DerekBauermeister, BorisConrad, Jan M.Ferella, Alfredo D.Lindner, M.Mahlstedt, JörnMorå, KnutPelssers, Bart
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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