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New particle resolves erratic sightings of axions Feb 9
Two pieces of experimental evidence that have been at odds over the existence of the "axion" -- an ultralight particle that could make up dark matter -- may now have been reconciled. Physicists in the US claim to have settled the discrepancy between the PVLAS and CAST experiments by considering the temperatures at which the axions would be produced (Phys. Rev. Lett. 98 050402).
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