Final results of the EDELWEISS-II WIMP search using a 4-kg array of cryogenic germanium detectors with interleaved electrodes

被引：157

作者：

Armengaud, E. ^{[1
]}

Augier, C. ^{[2
]}

Benoit, A. ^{[3
]}

Berge, L. ^{[4
]}

Bluemer, J. ^{[5
,6
]}

Broniatowski, A. ^{[4
]}

Brudanin, V. ^{[8
]}

Censier, B. ^{[2
]}

Chardin, G. ^{[4
]}

Chapellier, M. ^{[4
]}

Charlieux, F. ^{[2
]}

Coulter, P. ^{[10
]}

Cox, G. A. ^{[5
]}

Defay, X. ^{[4
]}

De Jesus, M. ^{[2
]}

Dolgorouki, Y. ^{[4
]}

Domange, J. ^{[1
,4
]}

Dumoulin, L. ^{[4
]}

Eitel, K. ^{[6
]}

Filosofov, D. ^{[8
]}

Fourches, N. ^{[1
]}

Gascon, J. ^{[2
]}

Gerbier, G. ^{[1
]}

Gironnet, J. ^{[2
]}

Gros, M. ^{[1
]}

Henry, S. ^{[10
]}

Herve, S. ^{[1
]}

Juillard, A. ^{[2
]}

Kluck, H. ^{[6
]}

Kozlov, V. ^{[6
]}

Kraus, H. ^{[10
]}

Kudryavtsev, V. A. ^{[11
]}

Loaiza, P. ^{[9
]}

Marnieros, S. ^{[4
]}

Navick, X. -F. ^{[1
]}

Nones, C. ^{[1
]}

Olivieri, E. ^{[4
]}

Pari, P. ^{[7
]}

Pattavina, L. ^{[2
]}

Paul, B. ^{[1
]}

Robinson, M. ^{[11
]}

Rozov, S. ^{[8
]}

Sanglard, V. ^{[2
]}

Schmidt, B. ^{[5
]}

Scorza, S. ^{[2
]}

Semikh, S. ^{[8
]}

Torrento-Coello, A. S. ^{[1
]}

Vagneron, L. ^{[2
]}

Verdier, M. -A. ^{[2
]}

Walker, R. J. ^{[1
]}

机构：

[1] CEA, Ctr Etud Saclay, IRFU, F-91191 Gif Sur Yvette, France

[2] Univ Lyon 1, CNRS, IPNL, IN2P3, F-69622 Villeurbanne, France

[3] CNRS Neel, F-38042 Grenoble 9, France

[4] Univ Paris 11, CSNSM, CNRS, IN2P3, F-91405 Orsay, France

[5] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[6] Karlsruhe Inst Technol, Inst Kernphys, D-76021 Karlsruhe, Germany

[7] CEA, Ctr Etud Saclay, IRAMIS, F-91191 Gif Sur Yvette, France

[8] JINR, Lab Nucl Problems, Dubna 141980, Moscow Region, Russia

[9] CEA, CNRS, Lab Souterrain Modane, F-73500 Modane, France

[10] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[11] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

PHYSICS LETTERS B | 2011年 / 702卷 / 05期

基金：

英国科学技术设施理事会; 俄罗斯基础研究基金会;

关键词：

Dark matter; Cryogenic Ge detectors; WIMP searches; DARK-MATTER;

D O I：

10.1016/j.physletb.2011.07.034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The EDELWEISS-II Collaboration has completed a direct search for WIMP dark matter with an array of ten 400-g cryogenic germanium detectors in operation at the Laboratoire Souterrain de Modane. The combined use of thermal phonon sensors and charge collection electrodes with an interleaved geometry enables the efficient rejection of gamma-induced radioactivity as well as near-surface interactions. A total effective exposure of 384 kg d has been achieved, mostly coming from fourteen months of continuous operation. Five nuclear recoil candidates are observed above 20 key, while the estimated background is 3.0 events. The result is interpreted in terms of limits on the cross-section of spin-independent interactions of WIMPs and nucleons. A cross-section of 4.4 x 10(-8) pb is excluded at 90%CL for a WIMP mass of 85 GeV. New constraints are also set on models where the WIMP-nucleon scattering is inelastic. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：329 / 335

页数：7

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