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

By E. Armengaud, C. Augier, A. Benoit, L. Berg'e, J. Blumer, A. Broniatowski, V. Brudanin, B. Censier, G. Chardin, M. Chapellier and 41 more. 2011

227 citations recorded by the source corpus.

Abstract 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 γ-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 keV, 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 × 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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/726a48f712d212310a3dd94aa7923e5b10186b4a

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. T. Undagoitia
2. L. Baudis
3. L. Rauch
4. H. Ara'ujo
5. V. Chepel

Citations in the corpus

• Dark matter direct-detection experiments (2015, methodology): “d, enabling a rejection factor of more than 104 [174]. In the nal analysis of the EDELWEISS-II conguration, an array of ten 400g Ge detectors were operated and a total exposure of 384kgd was achieved[289]. A relatively high energy threshold of 20keV nrwas used in the analysis to avoid a reduced part”
• Direct dark matter detection: the next decade (2012, methodology): “In contrast, CDMS and EDELWEISS have reached sensitivities down to 3.3×10−44cm2 for a 90 GeV/c2 WIMP in a combined analysis with an effective exposure of 614 kg×days [51] and do not confirm these findings.”
• Colloquium: Annual modulation of dark matter (2013, unknown): “…2010), DEAP/CLEAN (Kos, 2010), DM-Ice (Cherwinka et al., 2012), DRIFT (Alner et al., 2005; Daw et al., 2012), EDELWEISS (Sanglard et al., 2005; Armengaud et al., 2011, 2012), EURECA (Kraus et al., 2011), KIMS (Kim et al., 2012), LUX (Hall et al., 2010), NAIAD (Alner et al., 2005), PandaX…”