Light dark matter search with DarkSide-50
Résumé
We present the latest results from the search for light dark matter particle interactions with the DarkSide-50 dual-phase liquid argon time projection chamber. This analysis, based on the ionization signal only, improves the existing limits for spin-independent WIMP-nucleon interactions in the $[1.2, 3.6]$ GeV/c$^2$ mass range. The sensitivity is extended down to 40 MeV/c$^2$ by assuming the Migdal effect, responsible for an additional ionization signal from the recoiling atom. Finally, we set new constraints to interactions of dark matter particles with electrons in the final state, namely WIMPs, galactic axions, dark photons, and sterile neutrinos.
Mots clés
dark matter: direct detection
dark matter: interaction
dark matter: mass
time projection chamber: liquid argon
neutrino: sterile
WIMP nucleon: interaction
particle: interaction
ionization
sensitivity
photon: hidden sector
WIMP: dark matter
axion: cosmic radiation
atom
galaxy
channel cross section: upper limit
experimental results
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