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Low-mass dark matter search using ionization signals in XENON100
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Number of Authors: 111
2016 (English)In: Physical Review D, ISSN 2470-0010, Vol. 94, no 9, 092001Article in journal (Refereed) Published
Abstract [en]

We perform a low-mass dark matter search using an exposure of 30 kg x yr with the XENON100 detector. By dropping the requirement of a scintillation signal and using only the ionization signal to determine the interaction energy, we lowered the energy threshold for detection to 0.7 keV for nuclear recoils. No dark matter detection can be claimed because a complete background model cannot be constructed without a primary scintillation signal. Instead, we compute an upper limit on the WIMP-nucleon scattering cross section under the assumption that every event passing our selection criteria could be a signal event. Using an energy interval from 0.7 keV to 9.1 keV, we derive a limit on the spin-independent WIMP-nucleon cross section that excludes WIMPs with a mass of 6 GeV/c(2) above 1.4 x 10(-41) cm(2) at 90% confidence level.

Place, publisher, year, edition, pages
2016. Vol. 94, no 9, 092001
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-136265DOI: 10.1103/PhysRevD.94.092001ISI: 000386772500001OAI: oai:DiVA.org:su-136265DiVA: diva2:1052348
Available from: 2016-12-06 Created: 2016-12-01 Last updated: 2016-12-06Bibliographically approved

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Bauermeister, BorisConrad, JanFerella, Alfredo D.Pelssers, Bart
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