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The DarkSide-50 experiment is aimed at searching for dark-matter weakly interacting particles (WIMPs) with a large mass (>50 GeV), where a critical fact is the possibility of separating the signal from the possible background. The recently accomplished analysis of the data collected for 532 operation days of the facility days demonstrated unique capabilities of suppressing the background in the detector. An additional analysis of the low-energy region of the spectrum of the ionization events demonstrated that the DarkSide-50 detector was sensitive to low masses (<10 GeV) of dark-matter particles.  These results add more confidence in that the observation of a positive signal in the second-generation facility, such as the projected DarkSide-20k experiment, will really mean observation of particles of a new nature.

For more detail, see here.