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Results on low-mass weakly interacting massive particles from a 11 kg d target exposure of DAMIC at SNOLAB

descriptionPublicationkeyboard_double_arrow_right Conference object , Article , Preprint , Other literature type , Journal 10 Dec 2020Embargo end date: 01 Jan 2020 France, Spain, Spain, Spain Publisher:Sissa MedialabJournal:Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)Funded by:ANR | SUPER, UKRI | Materia Oscura: Instrumen..., SNSF | The search for dark matte... +1 projects

Authors: A. Aguilar-Arevalo; D. Amidei; D. Baxter; G. Cancelo; B. A. Cervantes Vergara; A. E. Chavarria; J. C. D’Olivo; +25 Authors

doi: 10.22323/1.395.0539 , 10.1103/physrevlett.125.241803 , 10.48550/arxiv.2007.15622

pmid: 33412014

arXiv: http://arxiv.org/abs/2007.15622 , 2007.15622

handle: 10261/229942 , 10902/28225

Results on low-mass weakly interacting massive particles from a 11 kg d target exposure of DAMIC at SNOLAB

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Abstract

We present constraints on the existence of weakly interacting massive particles (WIMPs) from an 11 kg-day target exposure of the DAMIC experiment at the SNOLAB underground laboratory. The observed energy spectrum and spatial distribution of ionization events with electron-equivalent energies $>$200 eV$_{\rm ee}$ in the DAMIC CCDs are consistent with backgrounds from natural radioactivity. An excess of ionization events is observed above the analysis threshold of 50 eV$_{\rm ee}$. While the origin of this low-energy excess requires further investigation, our data exclude spin-independent WIMP-nucleon scattering cross sections $��_{��-n}$ as low as $3\times 10^{-41}$ cm$^2$ for WIMPs with masses $m_��$ from 7 to 10 GeV$c^{-2}$ . These results are the strongest constraints from a silicon target on the existence of WIMPs with $m_��$$

6 pages, 4 figures

Countries

France, Spain, Spain, Spain

Related Organizations

UNIVERSITE PARIS DESCARTES
France
Sorbonne University
France
Pacific Northwest National Laboratory
United States
Pacific Northwest National Laboratory
United States
SORBONNE UNIVERSITE
France

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Keywords

WIMP nucleon: scattering, scattering [dark matter], mass [dark matter], silicon: target, GeV, dark matter: direct detection, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], target [silicon], direct detection [dark matter], spatial distribution [ionization], CDMS, spatial distribution, tritium, photon, radon, hidden sector, buildings, 520, WIMP nucleon, dark matter: scattering, cryogenics, radioactivity, readout, energy, Astrophysics - Cosmology and Nongalactic Astrophysics, noise, Cosmology and Nongalactic Astrophysics (astro-ph.CO), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], WIMP, energy spectrum, background: model, WIMP: mass, FOS: Physical sciences, 530, dark matter, target, dark matter: hidden sector, ionization, surface, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], background: radioactivity, CCD, model, detector, scattering [WIMP nucleon], background, dark matter: mass, scattering, nucleus, silicon, temperature, DAMIC, ionization: spatial distribution, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], mass, direct detection, ionization: energy, photon: detector, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph]

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