Recent status of the Dark Matter search with Edelweiss

TL;DR

The Edelweiss experiment employs advanced Ge-bolometers to search for WIMP dark matter, extending analysis to low-mass WIMPs and setting new limits, with ongoing upgrades and future plans for larger-scale experiments.

Contribution

This paper reports the extension of Edelweiss's WIMP search to low-mass regions and discusses recent results, background studies, and future experimental developments.

Findings

New limits on low-mass WIMP-nucleon cross-section

Successful operation of 10 bolometers with muon veto

Progress on Edelweiss-III installation and future plans

Abstract

The Edelweiss experiment uses Ge-bolometers with an improved background rejection (interleaved electrode design) to search for WIMP dark matter. The setup is located in the underground laboratory, Laboratoire Souterrain de Modane (LSM, France). In 2009-2010 the collaboration successfully operated ten 400-g bolometers together with an active muon veto shielding. Published analysis of this measurement campaign was optimized for WIMP masses above 50 GeV. Recently, the analysis was extended to the low-mass WIMP region using a quality subset of the 2009-2010 data setting new limits on the spin-independent WIMP-nucleon scattering cross-section. We present the low-mass WIMP analysis, background investigations and the latest measurements with a subset of the forty 800-g detectors that will be installed for the Edelweiss-III. Ongoing installation works of the Edelweiss-III setup and further plans for a next generation experiment, EURECA, are discussed.