@article{10902/31476,
year = {2022},
url = {https://hdl.handle.net/10902/31476},
abstract = {The EDELWEISS collaboration reports on the search for dark matter particle interactions via Migdal effect with masses between 32 MeV · c−2 to 2 GeV · c−2 using a 200 g cryogenic Ge detector sensitive to simultaneously heat and ionization signals and operated underground at the Laboratoire Souterrain de Modane in France. The phonon signal was read out using a transition edge sensor made of a NbSi thin film. The detector was biased at 66 V in order to benefit from the Neganov-Trofimov-Luke amplification and resulting in a resolution on the energy of electron recoils of 4.46 eVee (102.58 eV at 66 V) and an analysis threshold of 30 eVee. The sensitivity is limited by a dominant background not associated to charge creation in the detector. The search constrains a new region of parameter space for cross sections down to 10−29 cm2 and masses between 32 and 100 MeV · c−2. The achieved low threshold with the NbSi sensor shows the relevance of its use for out-of-equilibrium phonon sensitive devices for low-mass dark matter searches.},
organization = {The EDELWEISS project is supported in part by the French Agence Nationale pour la Recherche (ANR) and the LabEx Lyon Institute of Origins (ANR-10-LABX 0066) of the Universit´e de Lyon within the program “Investissements d’Avenir” (ANR-11-IDEX-00007), by the P2IO LabEx (ANR-10-LABX-0038) in the framework “Investissements d’Avenir” (ANR-11-IDEX-0003-01) managed by the ANR (France), and the Russian Foundation for Basic Research (Grant No. 18-02- 00159). This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 838537. B. J. K. thanks the Spanish Agencia Estatal de Investigación (AEI, MICIU) for the support to the Unidad de Excelencia María de Maeztu Instituto de Física de Cantabria, Ref. MDM-2017-0765. We thank J. P. Lopez (IP2I) and the Physics Department of Universit´e Lyon 1 for their contribution to the radioactive sources.},
publisher = {American Physical Society},
publisher = {Physical Review D, 2022, 106(6), 062004},
title = {Search for sub-GeV dark matter via the Migdal effect with an EDELWEISS germanium detector with NbSi transition-edge sensors},
author = {Armengaud, E. and Arnaud, Q. and Augier, C. and Benoît, A. and Bergé, L. and Billard, J. and Broniatowski, A. and Camus, P. and Cazes, A. and Chapellier, M. and Charlieux, F. and Jésus, M. De and Dumoulin, L. and Eitel, K. and Filippini, J.-B. and Filosofov, D. and Gascon, J. and Giuliani, A. and Gros, M. and Kavanagh, Bradley James},
}