Light dark matter search with DarkSide-50
D. Franco (for the DarkSide-50 Collaboration)

TL;DR
This paper reports new limits on light dark matter particles using the DarkSide-50 detector, extending sensitivity to lower masses and exploring interactions with electrons, including effects like the Migdal effect.
Contribution
It provides the latest experimental constraints on light dark matter interactions in the 1.2 to 3.6 GeV/c^2 mass range, including the first limits considering the Migdal effect.
Findings
Improved limits on spin-independent WIMP-nucleon interactions for light masses.
Extended sensitivity down to 40 MeV/c^2 using the Migdal effect.
Set new constraints on dark matter-electron interactions.
Abstract
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 GeV/c mass range. The sensitivity is extended down to 40 MeV/c 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.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Quantum, superfluid, helium dynamics
