Improved WIMP-search reach of the CDMS II germanium data
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^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^(−44) and 1.18×10^(−41) at 90% confidence for 60 and 8.6 GeV/c^2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6) GeV/c^2 WIMPs.
Additional Information
© 2015 American Physical Society. Received 23 April 2015; published 12 October 2015. The CDMS Collaboration gratefully acknowledges the contributions of numerous engineers and technicians; we would like to especially thank Dennis Seitz, Jim Beaty, Bruce Hines, Larry Novak, Richard Schmitt and Astrid Tomada. In addition, we gratefully acknowledge assistance from the staff of the Soudan Underground Laboratory and the Minnesota Department of Natural Resources. This work is supported in part by the National Science Foundation, the U.S. Department of Energy, NSERC Canada, and by MultiDark (Spanish MINECO). Fermilab is operated by the Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359. SLAC is operated under Contract No. DE-AC02-76SF00515 with the United States Department of Energy.Attached Files
Published - PhysRevD.92.072003.pdf
Submitted - 1504.05871v2.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:3a3f29199badb83626ef67deff5cc1bd
|
11.0 MB | Preview Download |
|
md5:c3ae9ac0cc984df1187ffa1c08db7be8
|
4.3 MB | Preview Download |
Additional details
- Eprint ID
- 61930
- Resolver ID
- CaltechAUTHORS:20151106-083216867
- NSF
- Department of Energy (DOE)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ministerio de Economía, Industria y Competitividad (MINECO)
- MultiDark
- Department of Energy (DOE)
- DE-AC02-07CH11359
- Department of Energy (DOE)
- DE-AC02-76SF00515
- Created
-
2015-11-06Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field