... a tiny particle with no charge, a very low mass and a lifetime much shorter than a nanosecond, dubbed the "axion," has now been detected ...
J. Phys. G: Nuclear and Particle Physics 34 (2007), 129-138,
News article from PhysOrg,
Discussion at n-category Cafe
Как интересно. Посмотрим, что будет дальше.