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Title: Low-mass dark matter search with CDMSlite

Journal Article · · Physical Review. D.
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The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses < 10 GeV/c2. In this mode, a higher detector-bias voltage is applied to amplify the phonon signals produced by drifting charges. This article presents studies of the experimental noise and its effect on the achievable energy threshold, which is demonstrated to be as low as 56 eVee (electron equivalent energy). The detector-biasing configuration is described in detail, with analysis corrections for voltage variations to the level of a few percent. Detailed studies of the electric-field geometry, and the resulting successful development of a fiducial parameter, eliminate poorly measured events, yielding an energy resolution ranging from ~ 9 eVee at 0 keV to 101 eVee at ~ 10 keVee. New results are derived for astrophysical uncertainties relevant to the WIMP-search limits, specifically examining how they are affected by variations in the most probable WIMP velocity and the Galactic escape velocity. These variations become more important for WIMP masses below 10 GeV/c2. Finally, new limits on spin-dependent low-mass WIMP-nucleon interactions are derived, with new parameter space excluded for WIMP masses ≲ 3 GeV/c2.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of South Dakota, Vermillion, SD (United States)
Sponsoring Organization:
National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
SuperCDMS Collaboration; SuperCDMS
Grant/Contract Number:
AC05-76RL01830; AC02-76SF00515; AC02-07CH11359; 13-S-04; AC02-05CH11231; SC0015657
OSTI ID:
1419975
Alternate ID(s):
OSTI ID: 1413685; OSTI ID: 1417221; OSTI ID: 1435109; OSTI ID: 1598295
Report Number(s):
FERMILAB-PUB-17-265-AE; arXiv:1707.01632; PRVDAQ; TRN: US1801424
Journal Information:
Physical Review. D., Vol. 97, Issue 2; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 137 works
Citation information provided by
Web of Science

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Cited By (27)

Searches for Light Dark Matter with the CRESST-III Experiment journal February 2020
Energy loss due to defect formation from 206 Pb recoils in SuperCDMS germanium detectors journal August 2018
Direct detection of WIMP dark matter: concepts and status journal August 2019
CNO neutrino Grand Prix: the race to solve the solar metallicity problem journal April 2018
Possible s -wave annihilation for MeV dark matter with the 21-cm absorption journal August 2019
The Sun as a sub-GeV dark matter accelerator journal March 2018
Paleo-detectors: Searching for dark matter with ancient minerals journal February 2019
Diamond detectors for direct detection of sub-GeV dark matter journal June 2019
Limits on Light Weakly Interacting Massive Particles from the First 102.8   kg × day Data of the CDEX-10 Experiment journal June 2018
The SABRE project and the SABRE Proof-of-Principle journal April 2019
Background assessment for the TREX dark matter experiment journal September 2019
Effects of threshold energy on reconstructions of properties of low-mass WIMPs in direct dark matter detection experiments journal July 2018
Asymmetric dark matter: residual annihilations and self-interactions text January 2018
Asymmetric Dark Matter: Residual Annihilations and Self-Interactions text January 2017
Light Dark Matter Search with Ionization Signals in XENON1T text January 2019
Search for Light Dark Matter Interactions Enhanced by the Migdal Effect or Bremsstrahlung in XENON1T text January 2019
Asymmetric dark matter: residual annihilations and self-interactions text January 2017
Effects of Threshold Energy on Reconstructions of Properties of Low-Mass WIMPs in Direct Dark Matter Detection Experiments text January 2018
Energy Loss Due to Defect Formation from $^{206}$Pb Recoils in SuperCDMS Germanium Detectors text January 2018
Background assessment for the TREX Dark Matter experiment text January 2018
Diamond Detectors for Direct Detection of Sub-GeV Dark Matter text January 2019
Axion Dark Matter Detection with CMB Polarization text January 2019
Direct Detection of WIMP Dark Matter: Concepts and Status text January 2019
First results from the CRESST-III low-mass dark matter program text January 2019
The Migdal Effect and Photon Bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering text January 2019
Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jin-Ping Laboratory text January 2019
Light Dark Matter Search with Ionization Signals in XENON1T text January 2019

Figures / Tables (35)

Figure 1.(p. 3)figure Figure 1.
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Table I.(p. 14)table Table I.
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Table II.(p. 22)table Table II.
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Figure 30.(p. 24)figure Figure 30.
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Figure 32.(p. 26)figure Figure 32.
Figure 33.(p. 26)figure Figure 33.

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