Antimeson -

Particle seen switching between matter and antimatter at CERN

Elara sat back, the blue light of the monitors reflecting in her eyes. The antimeson was gone, decayed into a spray of more stable particles, but its brief, flickering life had proven that the universe was slightly, beautifully broken. And in that crack, everything we know had found a place to grow. antimeson

Elara adjusted her glasses. On the screen, a neutral B-meson was doing something impossible. It wasn’t just decaying; it was . One moment it was matter, the next it was antimatter, flipping back and forth trillions of times per second. Particle seen switching between matter and antimatter at