Yale scientists are part of a new international experiment that challenges previous claims about the detection of non-luminous dark matter. Astrophysical evidence suggests that the universe contains a large amount of non-luminous dark matter, yet no definite signal of it has been observed despite concerted efforts by many experimental groups. One exception to this is the long-debated claim by the DArk MAtter (DAMA) collaboration, which has reported positive observations of dark matter in its sodium-iodide detector array. The new COSINE-100 experiment, based at an underground, dark-matter detector at the Yangyang Underground Laboratory in South Korea, has begun to explore DAMA's claim. It is the first experiment sensitive enough to test DAMA and use the same target material of sodium iodide.
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