A search for low-mass WIMPs with EDELWEISS-II heat-and-ionization detectors

Abstract

We report on a search for low-energy (E < 20 keV) WIMP-induced nuclear recoils using data collected in 2009 - 2010 by EDELWEISS from four germanium detectors equipped with thermal sensors and an electrode design (ID) which allows to efficiently reject several sources of background. The data indicate no evidence for an exponential distribution of low-energy nuclear recoils that could be attributed to WIMP elastic scattering after an exposure of 113 kg.d. For WIMPs of mass 10 GeV, the observation of one event in the WIMP search region results in a 90% CL limit of 1.0x10^-5 pb on the spin-independent WIMP-nucleon scattering cross-section, which constrains the parameter space associated with the findings reported by the CoGeNT, DAMA and CRESST experiments.

PRD rapid communication accepted

References in corpus (5)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• First Dark Matter Results from the XENON100 Experiment
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Cited by in corpus (14)

• Dark Matter Results from 225 Live Days of XENON100 Data
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• Fitting the annual modulation in DAMA with neutrons from muons and neutrinos
• Light WIMP search in XMASS
• Quantifying the evidence for Dark Matter in CoGeNT data
• The Past and Future of Light Dark Matter Direct Detection
• Muon-induced neutrons do not explain the DAMA data
• Impact of Coherent Neutrino Nucleus Scattering on Direct Dark Matter Searches based on CaWO${}_4$ Crystals
• Sensitivity of alkali halide scintillating calorimeters with particle identification to investigate the DAMA dark matter detection claim
• Overview of Non-Liquid Noble Direct Detection Dark Matter Experiments
• Design and Calibration of the 34 GHz Yale Microwave Cavity Experiment
• Comparisons of annual modulations in MINOS with the event rate modulation in CoGeNT
• Particle background characterization and prediction for the NUCLEUS reactor CE$\nu$NS experiment
• Constraining Light Scalar Field with Torsion-Balance Gravity Experiments