Combined limits on WIMPs from the CDMS and EDELWEISS experiments

• Main Authors: Figueroa-Feliciano, Enectali (Contributor), Hertel, Scott Alexander (Contributor), Leman, Steven W. (Contributor), McCarthy, Kevin Ahmad (Contributor), Wikus, Patrick (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), MIT Kavli Institute for Astrophysics and Space Research (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2011-11-04T17:14:33Z.
• Subjects: Article
• Online Access: Get fulltext

The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. The total data set represents 614  kg·days equivalent exposure. A straightforward method of combination was chosen for its simplicity before data were exchanged between experiments. The results are interpreted in terms of limits on spin-independent weakly interacting, massive particle (WIMP)-nucleon cross section. For a WIMP mass of 90  GeV/c[superscript 2], where this analysis is most sensitive, a cross section of 3.3×10[superscript -44]  cm[superscript 2] is excluded at 90% C.L. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700  GeV/c[superscript 2]. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others.
National Science Foundation (U.S.) (Grant AST-9978911)
National Science Foundation (U.S.) (Grant PHY-0542066)
National Science Foundation (U.S.) (Grant PHY-0503729)
National Science Foundation (U.S.) (Grant PHY-0503629)
National Science Foundation (U.S.) (Grant PHY-0503641)
National Science Foundation (U.S.) (Grant PHY-0504224)
National Science Foundation (U.S.) (Grant PHY-0705052)
National Science Foundation (U.S.) (Grant PHY-0801708)
National Science Foundation (U.S.) (Grant PHY-0801712)
National Science Foundation (U.S.) (Grant PHY-0802575)
National Science Foundation (U.S.) (Grant PHY-0855525)
Natural Sciences and Engineering Research Council of Canada (NSERC) (Grant No. SAPPJ 386399)
United States. Dept. of Energy (Contract DE-AC03-76SF00098)
United States. Dept. of Energy (Contract DE-FG02-91ER40688)
United States. Dept. of Energy (Contract DE- FG02-92ER40701)
United States. Dept. of Energy (Contract DE-FG03-90ER40569)
United States. Dept. of Energy (Contract DE-FG03-91ER40618)
Swiss National Science Foundation (Grant 20-118119)
France. Agence nationale de la recherche (Contract No. ANR-06-BLAN-0376-01)
Russian Foundation for Basic Research
Science and Technology Facilities Council (Great Britain)