Scientists studying the tracks of particles streaming from six billion collisions of atomic nuclei at the Relativistic Heavy Ion Collider (RHIC)--an "atom smasher" that recreates the conditions of the early universe--have discovered a new kind of antimatter nucleus, the heaviest ever detected. Composed of four antimatter particles--an antiproton, two antineutrons, and one antihyperon--these exotic antinuclei are known as antihyperhydrogen-4.
Scientists studying the tracks of particles streaming from six billion collisions of atomic nuclei at the Relativistic Heavy Ion Collider (RHIC)--an "atom smasher" that recreates the conditions of the early universe--have discovered a new kind of antimatter nucleus, the heaviest ever detected. Composed of four antimatter particles--an antiproton, two antineutrons, and one antihyperon--these exotic antinuclei are known as antihyperhydrogen-4.
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