RECENT experiments 1,2 have shown that when metals are bombarded with energetic protons and ions, charged particles are emitted along with neutral particles. The present work was carried out to ...

When one snooker ball hits another, both spring away from each other in an elastic manner. In the case of two photons a similar process - the elastic collision - has never been observed. Physicists ...

New data from particle collisions at the Relativistic Heavy Ion Collider (RHIC), an "atom smasher" at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, reveals how the primordial ...