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 ...

A snapshot of a computer simulation showing how energy density changes over time in the collision of a lead ion with a photon emitted by another lead ion. The world’s largest and most powerful ...

The study of these fast-moving particles provides significant clues about the early universe.

Scientists have spotted the heaviest antimatter nucleus ever detected lurking in a particle accelerator. The antimatter heavyweight, called antihyperhydrogen-4, is made up of an antiproton, two ...