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Sub-GeV Dark Matter Searches with EDELWEISS: New results and prospects
by H. Lattaud on behalf of the EDELWEISS collaboration
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Submission summary
| Authors (as registered SciPost users): | Hugues Lattaud |
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| Preprint Link: | https://arxiv.org/abs/2211.04176v1 (pdf) |
| Date accepted: | 2023-03-03 |
| Date submitted: | 2022-11-09 09:53 |
| Submitted by: | Lattaud, Hugues |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
The Edelweiss collaboration performs light Dark Matter (DM) particles searches with germanium bolometer collecting charge and phonon signals. Thanks to the Neganov-Trofimov-Luke (NTL) effect, a RMS resolution of 4.46 electron-hole pairs was obtained on a massive (200g) germanium detector instrumented with a NbSi Transition Edge Sensor (TES) operated underground at the Laboratoire Souterrain de Modane (LSM). This sensitivity made possible a search for WIMP using the Migdal effect down to 32 MeV/C² and exclude cross-sections down to 10e-29 cm². It is the first measurement in cryogenic germanium with such thermal sensor, proving the high relevance of this technology. Furthermore, such TES have shown sensitivity to out-of-equilibrium phonons, paving the way for EDELWEISS new experience CRYOSEL. This is an important step in the development of Ge detectors with improved performance in the context of the EDELWEISS-SubGeV program.
Published as SciPost Phys. Proc. 12, 012 (2023)