Search for sub-GeV dark matter via the Migdal effect with an EDELWEISS germanium detector with NbSi transition-edge sensors - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review D Année : 2022

Search for sub-GeV dark matter via the Migdal effect with an EDELWEISS germanium detector with NbSi transition-edge sensors

P. Camus
  • Fonction : Auteur
K. Eitel
  • Fonction : Auteur
D. Filosofov
  • Fonction : Auteur
M. Kleifges
  • Fonction : Auteur
S. Rozov
  • Fonction : Auteur
E. Yakushev
  • Fonction : Auteur
B.J. Kavanagh
  • Fonction : Auteur

Résumé

The EDELWEISS collaboration reports on the search for dark matter particle interactions via Migdal effect with masses between 32MeV·c-2 to 2GeV·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 4.46eVee (102.58 eV at 66 V) and an analysis threshold of 30eVee. 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 10-29cm2 and masses between 32 and 100MeV·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.
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Dates et versions

hal-03616955 , version 1 (23-08-2023)

Identifiants

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E. Armengaud, Q. Arnaud, C. Augier, A. Benoît, L. Bergé, et al.. Search for sub-GeV dark matter via the Migdal effect with an EDELWEISS germanium detector with NbSi transition-edge sensors. Physical Review D, 2022, 106 (6), pp.062004. ⟨10.1103/PhysRevD.106.062004⟩. ⟨hal-03616955⟩
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