The magnetic moment of the muon—a tiny property of a tiny particle—has long puzzled physicists. Experiments and theory haven’t quite matched up, leaving open the thrilling possibility of discovering ...

Imagine two flashlights aimed at each other; do their beams collide? Nope! In everyday physics, light is too chill for drama.

They observe for the first time the decay of baryons, particles that make up the majority of the matter in the observable universe. After the Big Bang, matter and antimatter were created in equal ...

Scientists observe CP violation in baryons, a key clue in understanding why matter dominates the universe over antimatter.