Science

Atom Smasher Unveils Record-Breaking Heaviest Antimatter Hypernucleus

Aug 21, 2024 1 min read

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Physicists from the STAR Collaboration have identified the heaviest antimatter nucleus ever detected, named antihyperhydrogen-4. This discovery was made by researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences and the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory in the United States. The new antimatter particle consists of one antiproton, two antineutrons, and one anti-Lambda hyperon.

The researchers utilized a large, house-sized particle detector to sift through billions of collision events to identify the unique decay products of antihyperhydrogen-4. They observed that the lifetime of the antihyperhydrogen-4 particle showed no significant difference compared to its matter counterpart, supporting the symmetry between matter and antimatter properties. This finding is a significant step forward in understanding the matter-antimatter symmetry and could help explain why the universe is predominantly composed of matter rather than antimatter. The study's results have been published in the journal Nature.

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