The elusive particle that physicists knew had to to exist, but took half a century to find. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The ...

Physicists have spent decades treating mass as something the universe simply hands to particles, a property encoded in equations rather than explained from first principles. A new proposal argues that ...

Once a surprise to physicists, these particles are useful tools inside and outside the realm of particle physics.

Scientists are on the trail of a mysterious five-particle structure that could challenge one of the biggest theories in physics: string theory. This rare particle—never seen before and predicted not ...