Improved WIMP-search reach of the CDMS II germanium data
Name
PhysRevD.92.072003.pdf
Size
10.51 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Agnese, R.
Asai, M.
Balakishiyeva, D.
Barker, D.
Basu Thakur, R.
Bauer, D. A.
Borgland, A.
Bowles, M. A.
Brandt, D.
Brink, P. L.
Date Issued
October 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Agnese, R., et al. "Improved WIMP-search reach of the CDMS II germanium data." Phys. Rev. D 92, 072003 (October 2015). © 2015 American Physical Society
Version
Final published version
Abstract
CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to ~5 keV, to increase sensitivity near a WIMP mass of 8 GeV/c[superscript 2]. After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8 × 10[superscript −44] and 1.18 × 10[superscript −41] at 90% confidence for 60 and 8.6 GeV/c[superscript 2] WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6) GeV/c[superscript 2] WIMPs.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.92.072003
