Physicists Create Heaviest Antimatter Nucleus Yet

The discovery of antihyperhydrogen-4 offers new insights into matter-antimatter asymmetry in the universe.

Antihyperhydrogen-4 consists of an antiproton, two antineutrons, and an antihyperon.
Detected at the Relativistic Heavy Ion Collider, the antihyperhydrogen-4 nucleus decays rapidly.
Finding heavier antimatter particles helps in understanding why the universe is dominated by matter.
The discovery was confirmed by comparing decay products with known antimatter particles.
Research published in Nature underscores the importance of studying antimatter properties.