학술논문
Search for sub-GeV Dark Matter via Migdal effect with an EDELWEISS germanium detector with NbSi TES sensors
Document Type
Working Paper
Author
Armengaud, E.; Arnaud, Q.; Augier, C.; Benoît, A.; Bergé, L.; Billard, J.; Broniatowski, A.; Camus, P.; Caze, A.; Chapellier, M.; Charlieux, F.; De Jésus, M.; Dumoulin, L.; Eitel, K.; Filippini, J. B.; Filosofov, D.; Gascon, J.; Giuliani, A.; Gros, M.; Guy, E.; Jin, Y.; Juillard, A.; Kleifges, M.; Lattaud, H.; Marnieros, S.; Misiak, D.; Navick, X. F.; Nones, C.; Olivieri, E.; Oriol, C.; Pari, P.; Paul, B.; Poda, D.; Rozov, S.; Salagnac, T.; Sanglard, V.; Vagneron, L.; Yakushev, E.; Zolotarova, A.; Kavanagh, B. J.
Source
Phys. Rev. D 106, 062004 (2022)
Subject
Language
Abstract
The EDELWEISS collaboration reports on the search for Dark Matter (DM) particle interactions via Migdal effect with masses between $32$ MeV$\cdot$c$^{-2}$ to $2$ GeV$\cdot$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 $4.46$ eV$_{ee}$ (RMS) and an analysis threshold of $30$ eV$_{ee}$. 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 $10^{-29}$ cm$^2$ and masses between $32$ and $100$ MeV$\cdot$c$^{-2}$. The achieved low threshold with the NbSi sensor shows the relevance of its use for athermal-phonon sensitive devices for low-mass DM searches.
Comment: 10 pages, 9 figures
Comment: 10 pages, 9 figures