Combined Limits on WIMPs from the CDMS and EDELWEISS Experiments.

摘要

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 kgDTdays 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 spinindependent WIMP-nucleon cross-section. For a WIMP mass of 90 GeV/c2, where this analysis is most sensitive, a cross-section of 3.3 OE10-44 cm2 is excluded at 90% CL. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700 GeV/c2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others.