Combined Limits on WIMPs from the CDMS and EDELWEISS Experiments

Zafar U Ahmed,S W Leman, S Yellin,R Henningsyeomans, M Kiveni,D Filosofov,F Charlieux, R J Walker,Martin Huber, D Balakishiyeva,P C F Di Stefano, Philip W Coulter,S S Semikh,K M Sundqvist,F Dejongh,M De Jesus,Xf Navick,M Daal,L Dumoulin,S R Golwala,Harry Norman Nelson,D S Akerib,B Schmidt,X Defay,N Fourches,L Baudis,J Gironnet,Shuli Liu,V Kozlov,D Bauer,David O Caldwell,C Nones,E Olivieri,L Vagneron,V Kudryavtsev, L Berge,R Mahapatra,M Tarka,J Filippini, S Herv Mboxe,M Kos, J Fox,J Gascon,R Bunker,G Gerbier,G Chardin,B Paul,A Juillard,Y Ricci,M R Dragowsky, K A Mccarthy, S Fallows,P Wikus,P Loaiza,A Phipps,T Saab,W Rau, T Bruch,O Kamaev, H Kraus,D Holmgren,A Broniatowski,S Scorza,S Marnieros, J Blmer, B Cabrera, A Benoit,A S Torrentocoello,P Nadeau,A Reisetter,K Eitel,M A Verdier,J Domange,Michael Robinson,Y Dolgorouki,M Gros,L Hsu, S Arrenberg,P L Brink,H Kluck,R W Ogburn,N Mirabolfathi,J M Hall,E Yakushev,Jaehyeok Yoo,S A Hertel,Xuena Qiu,Josemir W A S Sander, D N Seitz,E Armengaud,C Augier,C Martinez, E Figueroafeliciano,B Serfass,V Sanglard,M Pyle, B Sadoulet, B A Young,V B Brudanin, G A Cox,V Mandic,B Censier,Jie Zhang,R W Schnee,S Rozov,L Pattavina,P Pari,J Cooley, M Fritts,C N Bailey, Sharon M Henry, P Cushman,M Chapellier,David Moore

PHYSICAL REVIEW D（2011）

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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 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(2), where this analysis is most sensitive, a cross section of 3: 3 x 10(-44) cm(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(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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关键词

cross section,bolometers,observational cosmology,dark matter

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