Axion particle spotted in solid-state crystal
(PHYSorg.com Physics)

Scientists at the Max Planck Institute for Chemical Physics of Solids in Dresden, Princeton University, the University of Illinois at Urbana-Champaign, and the University of the Chinese Academy of Sciences have spotted a famously elusive particle: The axion, first predicted 42 years ago as an elementary particle in extensions of the standard model of particle physics. The results of the experiments are published in Nature.