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Particle and nuclear

Particle and nuclear

Heavy exotic antinucleus gives up no secrets about antimatter asymmetry

29 Aug 2024
Antihyperhydrogen-4
Heavy particle Artistic representation of antihyperhydrogen-4, which is an antimatter hypernucleus made of an antiproton, two antineutrons, and an antilambda particle. It has been created by colliding gold nuclei (left). (Courtesy: Institute of Modern Physics, China)
An antihyperhydrogen-4 nucleus – the heaviest antinucleus ever produced – has been observed in h

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