Dark matter hunt yields unexplained signal

Article Link: https://www.bbc.com/news/science-environment-53085260

Discussion posted by: David McNamara

An experiment searching for signs of elusive dark matter has detected an unexplained signal. Scientists working on the Xenon1T experiment have detected more activity within their detector than they would otherwise expect. This “excess of events” could point to the existence of a previously undetected dark matter particle called an axion. Dark matter comprises 85% of matter in the cosmos, but its nature is unknown. Whatever it is, it does not reflect or emit detectable light, hence the name. There are three potential explanations for the new signal from the Xenon1T experiment. Two require new physics to explain, while one of them is consistent with a hypothesised dark matter particle called a solar axion.