Phys.org -
28 Oct 2019 17:24

Very little is known about the exact nature of dark matter. Currently, some of the most promising dark matter candidates are extremely light bosonic particles such as axions, axion-like particles or even dark photons. "These can also be regarded as a classical field oscillating at a certain frequency. But we can't yet put a figure on this frequency--and therefore the mass of the particles," explains Professor Dmitry Budker. "That is why in the CASPEr research program, we are systematically inves...
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