Scientists at the Relativistic Heavy Ion Collider have observed particles emerging directly from empty ...

Particle accelerators reveal the heart of nuclear matter by smashing together atoms at close to the speed of light. The high-energy collisions produce a shower of subatomic fragments that scientists ...

Collision physics is a research area within atomic, molecular, and optical physics that investigates the fundamental processes occurring when particles such as atoms, ions, electrons, or molecules ...

When fundamental particles are heavier or lighter than expected, physicists' understanding of the universe can tip into the ...