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Combined Limits on WIMPs from the CDMS and EDELWEISS Experiments

Z. Ahmed D. S. Akerib E. Armengaud S. Arrenberg C. Augier 1 C. N. Bailey D. Balakishiyeva L. Baudis D. A. Bauer A. Benoît L. Bergé 2 J. Blümer P. L. Brink A. Broniatowski 2 T. Bruch V. Brudanin R. Bunker B. Cabrera D. O. Caldwell B. Censier 1 M. Chapellier 2 G. Chardin 2 F. Charlieux 1 J. Cooley P. Coulter G. A. Cox P. Cushman M. Daal X. Defay 2 M. de Jesus 1 F. Dejongh P. C. F. Di Stefano Y. Dolgorouki 2 J. Domange 2 L. Dumoulin 2 M. R. Dragowsky K. Eitel S. Fallows E. Figueroa-Feliciano J. Filippini D. Filosofov N. Fourches 3 Allan J. Fox M. Fritts J. Gascon 1 G. Gerbier 3 J. Gironnet 1 S. R. Golwala M. Gros 3 Janet Hall R. Hennings-Yeomans S. Henry S. A. Hertel S. Hervé 3 D. Holmgren L. Hsu M. E. Huber A. Juillard 1 O. Kamaev M. Kiveni H. Kluck M. Kos V. Kozlov H. Kraus V. A. Kudryavtsev S. W. Leman S. Liu P. Loaiza 4 R. Mahapatra V. Mandic S. Marnieros 2 C. Martinez K. A. Mccarthy N. Mirabolfathi D. Moore P. Nadeau X-F. Navick 3 H. Nelson C. Nones 3 R. W. Ogburn E. Olivieri 2 P. Pari 5 L. Pattavina 1 B. Paul 3 A. Phipps M. Pyle X. Qiu W. Rau A. Reisetter Y. Ricci M. Robinson S. Rozov T. Saab B. Sadoulet J. Sander V. Sanglard 1 B. Schmidt R. W. Schnee S. Scorza 1 D. N. Seitz S. Semikh B. Serfass K. M. Sundqvist M. Tarka A. S. Torrento-Coello 3 L. Vagneron 1 M.-A. Verdier 1 R. J. Walker 3 P. Wikus E. Yakushev S. Yellin J. Yoo B. A. Young J. Zhang
Abstract : 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.d 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 WIMP-nucleon cross-section. For a WIMP mass of 90 GeV/c^2, where this analysis is most sensitive, a cross-section of 3.3 x 10^{-44} cm^2 is excluded at 90% CL. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700 GeV/c^2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others.
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Submitted on : Wednesday, May 18, 2011 - 9:19:50 AM
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Z. Ahmed, D. S. Akerib, E. Armengaud, S. Arrenberg, C. Augier, et al.. Combined Limits on WIMPs from the CDMS and EDELWEISS Experiments. Physical Review D, American Physical Society, 2011, 84, pp.011102(R). ⟨10.1103/PhysRevD.84.011102⟩. ⟨in2p3-00593910⟩



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