Observations that physicists have so far failed to replicate could be the result of misinterpreted data.
To catch dark matter, modules containing sodium-iodide crystals sit inside the COSINE-100 detector in South Korea. The experiment started running in 2016.Physicists have shown that an underground experiment in South Korea can ‘see’ dark matter streaming through Earth — or not, depending on how its data are sliced. The results cast further doubt on a decades-old claim that another experiment has been detecting the mysterious substance.
Even though most of the physics community had discounted the DAMA/LIBRA results as probably spurious, the question of why the Italian experiment was seeing a periodic up-and-down in its recorded events remained. Over the years, the collaboration has convincingly rebuffed a number of proposed explanations.
To subtract the background flashes, the DAMA/LIBRA team averaged them out over every year, which could have made the number of remaining events look like a sawtooth wave. And because real-life data points are noisy, it could be easy, Rossi and his colleagues wrote in their 2020 report, to confuse the fluctuations with the type of sine wave expected from dark matter.
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