Latest results of the EDELWEISS-II experiment

Abstract

The EDELWEISS-II collaboration has performed a direct search for WIMP dark matter with an array of ten 400-g heat-and-ionization cryogenic detectors equipped with Inter-Digit electrodes for the rejection of near-surface events. Results from one year of continuous operation at the Laboratoire Souterrain de Modane will be presented. A sensitivity to the spin-independent WIMP-nucleon elastic cross-section of 4.4x10^{-8} pb was achieved using a 384 kgd effective exposure. We also interpret the results in the inelastic scattering scenario, excluding the DAMA allowed region for WIMP masses greater than 90 GeV for a mass splitting of 120 keV. The results obtained demonstrate the excellent background rejection capabilities of these simple and robust detectors in an actual WIMP search experiment. Some first results with 800-g detectors will be also presented together with the prospects for this experiment and the ton-scale EURECA project.