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Sub-GeV Dark Matter Searches with EDELWEISS: New results and prospects

by H. Lattaud on behalf of the EDELWEISS collaboration

Submission summary

Authors (as Contributors): Hugues Lattaud
Submission information
Arxiv Link: https://arxiv.org/abs/2211.04176v1 (pdf)
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
Ontological classification
Academic field: Physics
Specialties:
  • Gravitation, Cosmology and Astroparticle Physics
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.

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Resubmission 2211.04176v1 on 9 November 2022

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