DarkSide Releases First Dark Matter Results

The liquid-argon time projection chamber experiment DarkSide-50 has release the first results from their 50 kg dark matter detector. Using atmospheric argon rather than some highly purified source of argon, they are able to obtain the best current dark matter limit using argon as the target material. The result isn’t as strong as the current leading limits, which use xenon, but this was likely expected. Encouragingly, the DarkSide ended up with a background-free measurement, which bodes well for the continued use of argon-based dark matter detectors. DarkSide is currently operating in the Gran Sasso laboratory (LNGS) in Italy, a deep underground facility where many low-background particle physics experiments are performed.