In 1997, the DAMA/NaI experiment observed a signal whose annual variability was suggestive of dark matter. Despite the follow-up DAMA/LIBRA experiment producing similar results, claims of direct dark matter detection drew skepticism from the physics community. To test the claims independently, sister experiments ANAIS-112 and COSINE-100 were constructed using the same basic design as DAMA/NaI and DAMA/LIBRA. In 2021, the first dataset from ANAIS-112 was found to contain no such variability, tentatively ruling out dark matter as the cause of the earlier observations (see Synopsis: Experiment Casts Doubt on Potential Dark Matter Find). Now a new study that combines data from ANAIS-112 and COSINE-100 has excluded the dark matter explanation with greater confidence [1].
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