Armengaud, E., Arnaud, Q., Augier, C. et al. (63 more authors) (2016) Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search. Journal of Cosmology and Astroparticle Physics, 2016 (05). 019-019.
Abstract
We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4 − 30 GeV/c2 mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for ∼ 2.5 − 20 keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/c2 WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of 4.3 × 10−40 cm2 (resp. 9.4 × 10−44 cm2 ) is set on the spin-independent WIMPnucleon scattering cross-section for 5 (resp. 20) GeV/c2 WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/c2 WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 IOP Publishing. This is an author produced version of a paper subsequently published in Journal of Cosmology and Astroparticle Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | dark matter detectors; dark matter experiments |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 02 Nov 2016 15:46 |
Last Modified: | 01 Jul 2017 09:11 |
Published Version: | http://doi.org/10.1088/1475-7516/2016/05/019 |
Status: | Published |
Publisher: | IOP Publishing |
Refereed: | Yes |
Identification Number: | 10.1088/1475-7516/2016/05/019 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:106850 |